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Re: X-AIR CENTRAL X-air/Subaru

CAMERON O'HARA
 

Allan, If you would have a Free Video of the X-AIR could you please post one
to me.
Cameron O'Hara
1 A Noonan Court ,
Willetton,Perth
6155
Thank you . ps Michael Coates refered me too ask you !!

----- Original Message -----
From: "Allan Grigo" <allan@...>
To: <X-Air_Ultralight_Aircraft@...>
Sent: Thursday, 22 June 2000 7:08
Subject: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL X-air/Subaru


Hi, my name is Allan Grigo. I am the owner of an Xair, and am also
the agent in Western Australia.

To new builders - a couple of things to watch -

When aligning the front wheel with the rudder and drilling the bolt
hole for the front wheel assembly, drill one side first and insert
bolt, before drilling the other side. Don't try to drill the two
holes in one go, otherwise the holes will not line up with the
existing holes.

In relation to all aileron controlled pulleys and nuts under the
floor - make sure all nuts have ample Loctite and pulleys are free to
turn, because once the pod is installed these parts are not
accessible.


Finally - has any tried, or knows anybody who has fitted a 4 stroke
Subaru motor to an Xair. Would appreciate any comments, or knowledge
of this conversion.

Allan Grigo




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Re: X-AIR CENTRAL Re: Questions about the Xair F

Bill Magrini
 

开云体育

Hi Michael,
?
Thanks for helping.
?
The flaps were set by the former owner - Guy at Speedwing.? When in the up position, they are almost exactly even with the ailerons.? They are about 1/2 cm higher than the ailerons, which I set with the stick per your instructions.?
?
I flew the plane by myself this afternoon.? It was a perfect day for flying.??The plane flies great with only me in it and 10 gal of fuel.? I was able to cruise?from 50 to 65 mph (43? to 56 knots), depending on my power setting.? I could hold level flight down to about 5000 RPM (50 mph or 43 knots).? There was no adverse yaw.? It seems my problem was mainly with two heavy people in it.? Of course, I want to fly with two people at times.
?
I hope you are wrong about the Hirth having 5 HP less than book.? Since I get book RPM, I was assuming I was getting full HP, but Matt from Recreational Power (distributor for Hirth) says the engine will pick up a few HP as it breaks in.? Perhaps that is some of the problem.?
?
For your 582 engines:
  • Do you load it up to full gross weight?
  • How does it perform with two heavy people?
  • What prop do you use? Make, size, pitch?
  • What gear reduction do you use?
  • What is your cruise, stall, and climb speeds at full gross??
  • What is the 582's power settings at cruise and climb?
Thanks for your help.
?
Bill Magrini
Xair - Virginia/Maryland
?

-----Original Message-----
From: Michael Coates <xair@...>
To: Magrini, William J <william.magrini@...>; X-Air_Ultralight_Aircraft@... <X-Air_Ultralight_Aircraft@...>; Bertrand Cheval <randkar-ulm@...>
Date: Saturday, June 24, 2000 12:26 AM
Subject: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Re: Questions about the Xair F

>I really don't know ??,? there are too many variables here for me to work out.
>We don't have any fitted with Hirth engines so i don't know about the engine,
>the speeds are in MPH and we work in knots (even though Australia is Metric) and
>i have never used or seen a powerfin propeller.? I am going to try and convert
>all your figures and see what i get.
>
>I am also going to post this on the eGroup bulletin board for other owners
>worldwide to have a look at as there may also be another owner out there with
>the Hirth. Finally i have forwarded this to the factory in France, as they have
>more exposure to different configurations.
>
>A big question before we chase ourselves in circles is, how did you set up the
>flaps and ailerons, i have found the wrong flap setting in the "F" will upset it
>considerably !!, it needs to be set up properly to fly at it's best. The other
>thing i have heard about the Hirth's (and don't quote me it is third hand) is
>that the HP figures quoted are not close to the true achievable performance....
>take 5 HP of it ?? i would like to know the answer to that one also
>
>Thanks Michael
>
>"Magrini, William J" wrote:
>
>> Michael,
>> I am running a Hirth 2706 on an Xair-F
>> I have a Powerfin F prop with a 3.16 reduction.? My 68" 3 blade prop is set
>> at 14.5 degrees pitch to give me 6000 RPM at climb and about 6200 max RPM.
>> The plane weighs 256 kilos with 7 gal of fuel and full gross or 450 kilos,
>> with one 210 lb. pilot and a 215 lb. passenger.
>> I calculated the CG as follows:
>> Nose = 13.634 kilos
>> Right = 125 kilos
>> Left = 117.3? kilos
>> 13.334 x 146 = 1991/255.9 = 7.77 cm. Forward of datum.? So my nose is light
>> due to the light engine, but for some reason, my overall weight does not
>> seem light.?? Is that acceptable?
>> My 13 lb. 18 amp battery is behind the seat as far forward as possible. I
>> guess I could get a lighter battery or mount it behind the engine.
>> My speeds are alot higher than Xair specs show.? The plane climbs at about
>> 500 fpm, at about 50 to 55 mph which, I guess is okay for a hot day, and a
>> heavy load.? Cruise is about 60 to 65 mph indicated at 5800 to 6000 RPM.
>> The plane stalls much higher than the 30 mph indicated in the factory specs:
>> about 46-48, no flaps.? The trouble I'm having is that:
>> 1. The flight numbers are higher than indicated by the manufacturer.
>> 2. When I throttle back to 5500, I quickly drop speed to around 55 or so and
>> I loose altitude.? I need about 5800 RPM to maintain level flight, and about
>> 6000 RPM for a slight climb.
>> 3. The engine overheats if I maintain 5800 RPM or better. I mean really hot.
>> 550+ CHT
>> EGTs are O.K. at about 1100.? I have an air dam on the front cylinder (as
>> recommended by Hirth because the plane is in a tractor congiguration) and
>> both cylinders read the same.
>> I talked to Stuart at Powerfin and he says I need more pitch to the prop, in
>> order to be able to have more thrust at lower RPMs.? He says myt static
>> thrust is good, but cruise thrust is probably inadequate to overcome the
>> plane's drag at cruise speed - especially when the plane is fully loaded.
>> He says I'll have to cut the prop from 68" to 66" to allow for more pitch
>> and allow the engine to develop full power. The Hirth 2706 is rated at 65 hp
>> at 6200 RPM.? Maximum torque is at 5700 RPM.? So the engine runs at a lower
>> RPM than the Rotax 582.? I asked Stuart if he thought I needed a lower ratio
>> gear box (like 2.59) and he said he didn't think that would help.
>> Questions:
>>???????? How does this compare with your 2 seat performance on the Xair at
>> gross weight using a Rotax 582 engine?? I know you like the 618, but how
>> does the 582 perform at Gross?
>>???????? Do you think the prop is running too slow because of the 3.16 gear
>> ratio? What ratio do you run with the 582. What prop pitch.
>>???????? What are your recommendations?? (I can't afford a 618 right now.)
>
>
>------------------------------------------------------------------------
>CLICK HERE AND START SAVING ON LONG DISTANCE BILLS TODAY!
>
>------------------------------------------------------------------------
>
>
>
>
>
>


Re: Questions about the Xair F

Michael Coates
 

I really don't know ??, there are too many variables here for me to work out.
We don't have any fitted with Hirth engines so i don't know about the engine,
the speeds are in MPH and we work in knots (even though Australia is Metric) and
i have never used or seen a powerfin propeller. I am going to try and convert
all your figures and see what i get.

I am also going to post this on the eGroup bulletin board for other owners
worldwide to have a look at as there may also be another owner out there with
the Hirth. Finally i have forwarded this to the factory in France, as they have
more exposure to different configurations.

A big question before we chase ourselves in circles is, how did you set up the
flaps and ailerons, i have found the wrong flap setting in the "F" will upset it
considerably !!, it needs to be set up properly to fly at it's best. The other
thing i have heard about the Hirth's (and don't quote me it is third hand) is
that the HP figures quoted are not close to the true achievable performance....
take 5 HP of it ?? i would like to know the answer to that one also

Thanks Michael

"Magrini, William J" wrote:

Michael,
I am running a Hirth 2706 on an Xair-F
I have a Powerfin F prop with a 3.16 reduction. My 68" 3 blade prop is set
at 14.5 degrees pitch to give me 6000 RPM at climb and about 6200 max RPM.
The plane weighs 256 kilos with 7 gal of fuel and full gross or 450 kilos,
with one 210 lb. pilot and a 215 lb. passenger.
I calculated the CG as follows:
Nose = 13.634 kilos
Right = 125 kilos
Left = 117.3 kilos
13.334 x 146 = 1991/255.9 = 7.77 cm. Forward of datum. So my nose is light
due to the light engine, but for some reason, my overall weight does not
seem light. Is that acceptable?
My 13 lb. 18 amp battery is behind the seat as far forward as possible. I
guess I could get a lighter battery or mount it behind the engine.
My speeds are alot higher than Xair specs show. The plane climbs at about
500 fpm, at about 50 to 55 mph which, I guess is okay for a hot day, and a
heavy load. Cruise is about 60 to 65 mph indicated at 5800 to 6000 RPM.
The plane stalls much higher than the 30 mph indicated in the factory specs:
about 46-48, no flaps. The trouble I'm having is that:
1. The flight numbers are higher than indicated by the manufacturer.
2. When I throttle back to 5500, I quickly drop speed to around 55 or so and
I loose altitude. I need about 5800 RPM to maintain level flight, and about
6000 RPM for a slight climb.
3. The engine overheats if I maintain 5800 RPM or better. I mean really hot.
550+ CHT
EGTs are O.K. at about 1100. I have an air dam on the front cylinder (as
recommended by Hirth because the plane is in a tractor congiguration) and
both cylinders read the same.
I talked to Stuart at Powerfin and he says I need more pitch to the prop, in
order to be able to have more thrust at lower RPMs. He says myt static
thrust is good, but cruise thrust is probably inadequate to overcome the
plane's drag at cruise speed - especially when the plane is fully loaded.
He says I'll have to cut the prop from 68" to 66" to allow for more pitch
and allow the engine to develop full power. The Hirth 2706 is rated at 65 hp
at 6200 RPM. Maximum torque is at 5700 RPM. So the engine runs at a lower
RPM than the Rotax 582. I asked Stuart if he thought I needed a lower ratio
gear box (like 2.59) and he said he didn't think that would help.
Questions:
How does this compare with your 2 seat performance on the Xair at
gross weight using a Rotax 582 engine? I know you like the 618, but how
does the 582 perform at Gross?
Do you think the prop is running too slow because of the 3.16 gear
ratio? What ratio do you run with the 582. What prop pitch.
What are your recommendations? (I can't afford a 618 right now.)


Re: Xair

 

Talk to Ron Johnson at Advanced Ultralights. He runs the F-30 on a
Flightstar and loves it. The engine is rated at 80 hp at 5500 RPM
and has a 1200 hr TBO and 3 year crank warranty.

Fuel consumption is supposed to be 4.5 GPH versus 3.7 GPH for the
912. The weight is 129 lbs. with all the accessories. That is
almost the same as the 582. But you need a high pitch wide blade
prop of about 72" to absorb the power. The engine is much cheaper at
$5775. You probably don't need that much power unless you fly at
full gross or at high altitudes. I have a Hirth 2706 and I will be
very interested in how it performs.


--- In X-Air_Ultralight_Aircraft@..., coult@i... wrote:
Would anyone consider it a good idea or possible to fit a Hirth
F30,
2 stroke, 4 cylinder 80 HP engine to an Xair? Would the fuel
consumption be much higher than a Rotax 582 or could the gearing be
set up to have the engine running at a lower RPM considering the
higher HP?

Regards

Coulter.


Re: X-AIR CENTRAL Re: Questions about the Xair F

Michael Coates
 

?

Bill Magrini wrote:

?Hi Michael,?Thanks for helping.?The flaps were set by the former owner - Guy at Speedwing.? When in the up position, they are almost exactly even with the ailerons.? They are about 1/2 cm higher than the ailerons, which I set with the stick per your instructions. We align the flaps level with the underside of the wing - using planks of wood or similar to do the job.?I flew the plane by myself this afternoon.? It was a perfect day for flying.? The plane flies great with only me in it and 10 gal of fuel.? I was able to cruise from 50 to 65 mph (43? to 56 knots) It should be going faster, is the ASI accurate ??, can you check it with a GPS ?, depending on my power setting.? I could hold level flight down to about 5000 RPM (50 mph or 43 knots) 5000 rpm on the Rotax will do just over 50 on ours.? There was no adverse yaw.? It seems my problem was mainly with two heavy people in it.? Of course, I want to fly with two people at times.?I hope you are wrong about the Hirth having 5 HP less than book.? Since I get book RPM, I was assuming I was getting full HP, Is your tacho accurate ???? it may say your getting full rpm but it may be much less - therefore much less horsepower.... can you get a lend of a digital tacho for comparison. There is something major wrong and i dont know what ?? we just have to eliminate the obvious first but Matt from Recreational Power (distributor for Hirth) says the engine will pick up a few HP as it breaks in.? Perhaps that is some of the problem.?For your 582 engines:
  • Do you load it up to full gross weight? We fly ours at 490kgs in Australia
  • How does it perform with two heavy people? Very well - 582 900 feet/min at 450kgs
  • What prop do you use? Make, size, pitch? Brolga three blade 68" diameter 17 degrees
  • What gear reduction do you use? Rotax e box 3:1 ratio
  • What is your cruise, stall, and climb speeds at full gross?? Cruise 55 to 65, stall 25ish depends on heat etc.. climb ? they like to climb out hands free at 50 knots but you can pull them back to 35 but i like to let them fly
  • What is the 582's power settings at cruise and climb? We gear climb full power 6500 rpm cruise 5200 to 5400 for 55 to 60 knots - all day long
Thanks for your help.?Bill MagriniXair - Virginia/Maryland?-----Original Message-----
From: Michael Coates <xair@...>
To: Magrini, William J <william.magrini@...>; X-Air_Ultralight_Aircraft@... <X-Air_Ultralight_Aircraft@...>; Bertrand Cheval <randkar-ulm@...>
Date: Saturday, June 24, 2000 12:26 AM
Subject: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Re: Questions about the Xair F
?>I really don't know ??,? there are too many variables here for me to work out.
>We don't have any fitted with Hirth engines so i don't know about the engine,
>the speeds are in MPH and we work in knots (even though Australia is Metric) and
>i have never used or seen a powerfin propeller.? I am going to try and convert
>all your figures and see what i get.
>
>I am also going to post this on the eGroup bulletin board for other owners
>worldwide to have a look at as there may also be another owner out there with
>the Hirth. Finally i have forwarded this to the factory in France, as they have
>more exposure to different configurations.
>
>A big question before we chase ourselves in circles is, how did you set up the
>flaps and ailerons, i have found the wrong flap setting in the "F" will upset it
>considerably !!, it needs to be set up properly to fly at it's best. The other
>thing i have heard about the Hirth's (and don't quote me it is third hand) is
>that the HP figures quoted are not close to the true achievable performance....
>take 5 HP of it ?? i would like to know the answer to that one also
>
>Thanks Michael
>
>"Magrini, William J" wrote:
>
>> Michael,
>> I am running a Hirth 2706 on an Xair-F
>> I have a Powerfin F prop with a 3.16 reduction.? My 68" 3 blade prop is set
>> at 14.5 degrees pitch to give me 6000 RPM at climb and about 6200 max RPM.
>> The plane weighs 256 kilos with 7 gal of fuel and full gross or 450 kilos,
>> with one 210 lb. pilot and a 215 lb. passenger.
>> I calculated the CG as follows:
>> Nose = 13.634 kilos
>> Right = 125 kilos
>> Left = 117.3? kilos
>> 13.334 x 146 = 1991/255.9 = 7.77 cm. Forward of datum.? So my nose is light
>> due to the light engine, but for some reason, my overall weight does not
>> seem light.?? Is that acceptable?
>> My 13 lb. 18 amp battery is behind the seat as far forward as possible. I
>> guess I could get a lighter battery or mount it behind the engine.
>> My speeds are alot higher than Xair specs show.? The plane climbs at about
>> 500 fpm, at about 50 to 55 mph which, I guess is okay for a hot day, and a
>> heavy load.? Cruise is about 60 to 65 mph indicated at 5800 to 6000 RPM.
>> The plane stalls much higher than the 30 mph indicated in the factory specs:
>> about 46-48, no flaps.? The trouble I'm having is that:
>> 1. The flight numbers are higher than indicated by the manufacturer.
>> 2. When I throttle back to 5500, I quickly drop speed to around 55 or so and
>> I loose altitude.? I need about 5800 RPM to maintain level flight, and about
>> 6000 RPM for a slight climb.
>> 3. The engine overheats if I maintain 5800 RPM or better. I mean really hot.
>> 550+ CHT
>> EGTs are O.K. at about 1100.? I have an air dam on the front cylinder (as
>> recommended by Hirth because the plane is in a tractor congiguration) and
>> both cylinders read the same.
>> I talked to Stuart at Powerfin and he says I need more pitch to the prop, in
>> order to be able to have more thrust at lower RPMs.? He says myt static
>> thrust is good, but cruise thrust is probably inadequate to overcome the
>> plane's drag at cruise speed - especially when the plane is fully loaded.
>> He says I'll have to cut the prop from 68" to 66" to allow for more pitch
>> and allow the engine to develop full power. The Hirth 2706 is rated at 65 hp
>> at 6200 RPM.? Maximum torque is at 5700 RPM.? So the engine runs at a lower
>> RPM than the Rotax 582.? I asked Stuart if he thought I needed a lower ratio
>> gear box (like 2.59) and he said he didn't think that would help.
>> Questions:
>>???????? How does this compare with your 2 seat performance on the Xair at
>> gross weight using a Rotax 582 engine?? I know you like the 618, but how
>> does the 582 perform at Gross?
>>???????? Do you think the prop is running too slow because of the 3.16 gear
>> ratio? What ratio do you run with the 582. What prop pitch.
>>???????? What are your recommendations?? (I can't afford a 618 right now.)
>
>
>------------------------------------------------------------------------
>CLICK HERE AND START SAVING ON LONG DISTANCE BILLS TODAY!
>
>------------------------------------------------------------------------
>
>
>
>
>
>
?
?


Re: X-AIR CENTRAL Re: Questions about the Xair F

Bill Magrini
 

开云体育

Thanks Michael,
?
Your stall is 25 knots?? That is pretty much book.? Mine is way higher.? I hope we can figure this out.? If it were my ASI, then the top speeds would be high too. right?? If my?revmeter (tach) was reading really low. then my engine wouldn't start getting hot at 5800 rpm.? But I should check them out.?
?
I have a digital light tach that I tried.? It registered 1100 to 1700 RPM when I was showing 3000 on my engine tach.? I thought the digital tach was wrong.
?
This is frustrating.

-----Original Message-----
From: Michael Coates <xair@...>
To: X-Air_Ultralight_Aircraft@... <X-Air_Ultralight_Aircraft@...>
Date: Saturday, June 24, 2000 8:17 AM
Subject: Re: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Re: Questions about the Xair F

?

Bill Magrini wrote:

?Hi Michael,?Thanks for helping.?The flaps were set by the former owner - Guy at Speedwing.? When in the up position, they are almost exactly even with the ailerons.? They are about 1/2 cm higher than the ailerons, which I set with the stick per your instructions. We align the flaps level with the underside of the wing - using planks of wood or similar to do the job.?I flew the plane by myself this afternoon.? It was a perfect day for flying.? The plane flies great with only me in it and 10 gal of fuel.? I was able to cruise from 50 to 65 mph (43? to 56 knots) It should be going faster, is the ASI accurate ??, can you check it with a GPS ?, depending on my power setting.? I could hold level flight down to about 5000 RPM (50 mph or 43 knots) 5000 rpm on the Rotax will do just over 50 on ours.? There was no adverse yaw.? It seems my problem was mainly with two heavy people in it.? Of course, I want to fly with two people at times.?I hope you are wrong about the Hirth having 5 HP less than book.? Since I get book RPM, I was assuming I was getting full HP, Is your tacho accurate ???? it may say your getting full rpm but it may be much less - therefore much less horsepower.... can you get a lend of a digital tacho for comparison. There is something major wrong and i dont know what ?? we just have to eliminate the obvious first but Matt from Recreational Power (distributor for Hirth) says the engine will pick up a few HP as it breaks in.? Perhaps that is some of the problem.?For your 582 engines:
  • Do you load it up to full gross weight? We fly ours at 490kgs in Australia
  • How does it perform with two heavy people? Very well - 582 900 feet/min at 450kgs
  • What prop do you use? Make, size, pitch? Brolga three blade 68" diameter 17 degrees
  • What gear reduction do you use? Rotax e box 3:1 ratio
  • What is your cruise, stall, and climb speeds at full gross?? Cruise 55 to 65, stall 25ish depends on heat etc.. climb ? they like to climb out hands free at 50 knots but you can pull them back to 35 but i like to let them fly
  • What is the 582's power settings at cruise and climb? We gear climb full power 6500 rpm cruise 5200 to 5400 for 55 to 60 knots - all day long
Thanks for your help.?Bill MagriniXair - Virginia/Maryland?-----Original Message-----
From: Michael Coates <xair@...>
To: Magrini, William J <william.magrini@...>; X-Air_Ultralight_Aircraft@... <X-Air_Ultralight_Aircraft@...>; Bertrand Cheval <randkar-ulm@...>
Date: Saturday, June 24, 2000 12:26 AM
Subject: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Re: Questions about the Xair F
?>I really don't know ??,? there are too many variables here for me to work out.
>We don't have any fitted with Hirth engines so i don't know about the engine,
>the speeds are in MPH and we work in knots (even though Australia is Metric) and
>i have never used or seen a powerfin propeller.? I am going to try and convert
>all your figures and see what i get.
>
>I am also going to post this on the eGroup bulletin board for other owners
>worldwide to have a look at as there may also be another owner out there with
>the Hirth. Finally i have forwarded this to the factory in France, as they have
>more exposure to different configurations.
>
>A big question before we chase ourselves in circles is, how did you set up the
>flaps and ailerons, i have found the wrong flap setting in the "F" will upset it
>considerably !!, it needs to be set up properly to fly at it's best. The other
>thing i have heard about the Hirth's (and don't quote me it is third hand) is
>that the HP figures quoted are not close to the true achievable performance....
>take 5 HP of it ?? i would like to know the answer to that one also
>
>Thanks Michael
>
>"Magrini, William J" wrote:
>
>> Michael,
>> I am running a Hirth 2706 on an Xair-F
>> I have a Powerfin F prop with a 3.16 reduction.? My 68" 3 blade prop is set
>> at 14.5 degrees pitch to give me 6000 RPM at climb and about 6200 max RPM.
>> The plane weighs 256 kilos with 7 gal of fuel and full gross or 450 kilos,
>> with one 210 lb. pilot and a 215 lb. passenger.
>> I calculated the CG as follows:
>> Nose = 13.634 kilos
>> Right = 125 kilos
>> Left = 117.3? kilos
>> 13.334 x 146 = 1991/255.9 = 7.77 cm. Forward of datum.? So my nose is light
>> due to the light engine, but for some reason, my overall weight does not
>> seem light.?? Is that acceptable?
>> My 13 lb. 18 amp battery is behind the seat as far forward as possible. I
>> guess I could get a lighter battery or mount it behind the engine.
>> My speeds are alot higher than Xair specs show.? The plane climbs at about
>> 500 fpm, at about 50 to 55 mph which, I guess is okay for a hot day, and a
>> heavy load.? Cruise is about 60 to 65 mph indicated at 5800 to 6000 RPM.
>> The plane stalls much higher than the 30 mph indicated in the factory specs:
>> about 46-48, no flaps.? The trouble I'm having is that:
>> 1. The flight numbers are higher than indicated by the manufacturer.
>> 2. When I throttle back to 5500, I quickly drop speed to around 55 or so and
>> I loose altitude.? I need about 5800 RPM to maintain level flight, and about
>> 6000 RPM for a slight climb.
>> 3. The engine overheats if I maintain 5800 RPM or better. I mean really hot.
>> 550+ CHT
>> EGTs are O.K. at about 1100.? I have an air dam on the front cylinder (as
>> recommended by Hirth because the plane is in a tractor congiguration) and
>> both cylinders read the same.
>> I talked to Stuart at Powerfin and he says I need more pitch to the prop, in
>> order to be able to have more thrust at lower RPMs.? He says myt static
>> thrust is good, but cruise thrust is probably inadequate to overcome the
>> plane's drag at cruise speed - especially when the plane is fully loaded.
>> He says I'll have to cut the prop from 68" to 66" to allow for more pitch
>> and allow the engine to develop full power. The Hirth 2706 is rated at 65 hp
>> at 6200 RPM.? Maximum torque is at 5700 RPM.? So the engine runs at a lower
>> RPM than the Rotax 582.? I asked Stuart if he thought I needed a lower ratio
>> gear box (like 2.59) and he said he didn't think that would help.
>> Questions:
>>???????? How does this compare with your 2 seat performance on the Xair at
>> gross weight using a Rotax 582 engine?? I know you like the 618, but how
>> does the 582 perform at Gross?
>>???????? Do you think the prop is running too slow because of the 3.16 gear
>> ratio? What ratio do you run with the 582. What prop pitch.
>>???????? What are your recommendations?? (I can't afford a 618 right now.)
>
>
>------------------------------------------------------------------------
>CLICK HERE AND START SAVING ON LONG DISTANCE BILLS TODAY!
>
>------------------------------------------------------------------------
>
>
>
>
>
>
?
?


world-aircraft-news

 

Hi all,

There is a new egroup for fans of any aircraft from 747's to F15's .
It is brand new so
we need loads of members to cover the world of aircraft. Please join
at
www.egroups.com/group/world-aircraft-news
If you need help please email me at : graham1@...

Please join even if you will only check your email on the web .

Thanks in Advance
Graham Smith ( the owner )
Apologies if youve read this email already !


Re: X-AIR CENTRAL Re: Questions about the Xair F

Michael Coates
 

?

Bill Magrini wrote:

?Thanks Michael,?Your stall is 25 knots?? That is pretty much book.? Mine is way higher.? I hope we can figure this out.? If it were my ASI, then the top speeds would be high too. right? Not really..... i have seen an ASI where someone blew into the end of it only read correct from about 35 to 50 knots over that it would go up to 90 knots and under 35 it would show about 15, so it can happen? If my revmeter (tach) was reading really low. then my engine wouldn't start getting hot at 5800 rpm.? But I should check them out. Your engine should run at max revs without overheating for a considerable period of time eg? our 503's air cooled will run for over 1 hour flat out 5600 rpm without any problems, just to try and keep up with the 618's / 582's.?I have a digital light tach that I tried.? It registered 1100 to 1700 RPM when I was showing 3000 on my engine tach.? I thought the digital tach was wrong. All i can suggest is eliminate the obvious first, replace / borrow a new tacho and check it out first because overreving the engine will cause it to destruct, once that's right check the ASI. Use a GPS and fly four legs, say a big square, go North for say 2 minutes and check your ASI against your ground speed then turn East and do the same, after completing the four legs average the ground speed and you have your average taking into consideration the wind direction by flying all four directions. Do this three times once at say 40 knots and them at 50 and again at 60 and it will tell you if its out an a particular range. Otherwise send it to an instrument tech and get him to check it.

Finally - where is your ASI pickup located this is also very important.

Thanks Michael


Re: X-AIR CENTRAL Re: Questions about the Xair F

Bill Magrini
 

开云体育

?
-----Original Message-----
From: Michael Coates <xair@...>
To: X-Air_Ultralight_Aircraft@... <X-Air_Ultralight_Aircraft@...>
Date: Saturday, June 24, 2000 11:06 PM
Subject: Re: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Re: Questions about the Xair F

?

Bill Magrini wrote:

?Thanks Michael,?Your stall is 25 knots?? That is pretty much book.? Mine is way higher.? I hope we can figure this out.? If it were my ASI, then the top speeds would be high too. right? Not really..... i have seen an ASI where someone blew into the end of it only read correct from about 35 to 50 knots over that it would go up to 90 knots and under 35 it would show about 15, so it can happen? Does blowing ruin an ASI?? How hard do you have to blow?to ruin one??
?
If my revmeter (tach) was reading really low. then my engine wouldn't start getting hot at 5800 rpm.? But I should check them out. Your engine should run at max revs without overheating for a considerable period of time eg? our 503's air cooled will run for over 1 hour flat out 5600 rpm without any problems, just to try and keep up with the 618's / 582's.? I too can fly around all day at 5500 RPM.? My engine doesn't start getting hot until I leave it at 5800 RPM.? It will? go to redline at 6000 RPM.?
?
I have a digital light tach that I tried.? It registered 1100 to 1700 RPM when I was showing 3000 on my engine tach.? I thought the digital tach was wrong. All i can suggest is eliminate the obvious first, replace / borrow a new tacho and check it out first because overreving the engine will cause it to destruct, once that's right check the ASI. Use a GPS and fly four legs, say a big square, go North for say 2 minutes and check your ASI against your ground speed then turn East and do the same, after completing the four legs average the ground speed and you have your average taking into consideration the wind direction by flying all four directions. Do this three times once at say 40 knots and them at 50 and again at 60 and it will tell you if its out an a particular range. Otherwise send it to an instrument tech and get him to check it.? I flew tonight.? I was able to maintain altitude, just barely at 5000 RPM indicating 50 mph.? (She started feeling a bit mushy.??It likes 5200 RPM better.)? On the ground the wind was calm, but at 1000 ft, I could feel?a qyartering tailwind.? GPS indicated 50 and ASI indicated 48 to 55 MPH.? On the trip back, there was a quartering?headwind. (with?a considerable?crab angle)? The GPS indicated 43 mph and the ASI indicated 55 mph at 5200 RPM.?

Finally - where is your ASI pickup located this is also very important.

My pickup is on the left wing.? It is not exactly parallel with my flightpath. It is pointed up about 15 degrees.

Again, thanks loads for your help, Michael





Re: X-AIR CENTRAL Re: Questions about the Xair F

Ted Clement
 

Bill, a heads up on the Hirth: A local guy here in North Carolina has been
running the 65 hp one with fuel injection since last year on his Rans S12,
now has around 125 hours on it and I heard today that the crankshaft went
up! Hirth seems to be unable to overcome persistant problems, and no matter
what the company says about how good they are now, be CAREFUL. Not trying
to scare anyone, but I personally don't think they are anywhere near the
reliability of the tried and true Rotax. Its too bad as it is a good
looking engine, lighter than comparable Rotax, and his put out the power;
the Rans with 2 people got off the ground in a hurry. Maybe someday
someone will come up with an afordable 4-stroke.

____________________________________________________________________________
___

At 12:43 AM 6/25/00 +0000, you wrote:
-----Original Message-----
From: <xair@...>
To:
X-Air_Ultralight_Aircraft@...<X-Air_Ultralight_Aircraft@...>
Date: Saturday, June 24, 2000 11:06 PM
Subject: Re: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Re: Questions
about the Xair F

Bill Magrini wrote: Thanks Michael, If it were my
ASI, then the top speeds would be high too. right? Not really..... i have
seen an ASI where someone blew into the end of it only read correct
from about 35 to 50 knots over that it would go up to 90 knots and
under 35 it would show about 15, so it can happen But
I should check them out. our 503's air cooled will run for over
1 hour flat out 5600 rpm without any problems, just to try and keep up
with the 618's / 582's. I thought the digital tach
was wrong. All i can suggest is eliminate the obvious first, replace /
borrow a new tacho and check it out first because overreving the
engine will cause it to destruct, once that's right check the ASI. Use
a GPS and fly four legs, say a big square, go North for say 2 minutes
and check your ASI against your ground speed then turn East and do the
same, after completing the four legs average the ground speed and you
have your average taking into consideration the wind direction by
flying all four directions. Do this three times once at say 40 knots
and them at 50 and again at 60 and it will tell you if its out an a
particular range. Otherwise send it to an instrument tech and get him
to check it. Finally - where is your ASI pickup
located this is also very important. It is not exactly
parallel with my flightpath. It is pointed up about 15 degrees.
Again, thanks loads for your help, Michael










Fw: 2si 690L-70 report

Richard Stubbs
 

----- Original Message -----
From: Richard Stubbs <richard@...>
To: <misasa@...>
Sent: 26 June 2000 09:08
Subject: 2si 690L-70 report


Hi everyone

Please find attached a report on the 2SI 690L-70 motor we are busy working
on.
I will be happy to answer any questions. Our new website can be viewed
prior
to being hosted officially at www.icon.co.za/~sergiol/xair.

Best regards now

Richard Stubbs.


Re: X-AIR CENTRAL Re: Questions about the Xair F

Peter Stuy
 

开云体育

G'day Bill,
?
I have doors on my XAIR and find that the cabin pressure is definiteliy lower that outside pressure. This affects my ASI reading and altimeter readins, as I do not have a static line. Do you?
I did the same? Pitot tube tilted up. But that means that as you put thte nose down for higher speeds, the ASI will over read more, than with the nose up at low speeds. If not done yet, do fit a static pickup and dine to your instruments.
?
Cheers,
?
Peter Stuy


Re: X-AIR CENTRAL Re: Questions about the Xair F

Bill Magrini
 

开云体育

Thanks Peter.
?
I have doors, but I like to fly with them off so I do not have the doors fitted now.? Also no static line.
?
Cheers,
?
Bill

-----Original Message-----
From: Peter Stuy <pstuy@...>
To: X-Air_Ultralight_Aircraft@... <X-Air_Ultralight_Aircraft@...>
Date: Tuesday, June 27, 2000 12:40 AM
Subject: Re: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Re: Questions about the Xair F

G'day Bill,
?
I have doors on my XAIR and find that the cabin pressure is definiteliy lower that outside pressure. This affects my ASI reading and altimeter readins, as I do not have a static line. Do you?
I did the same? Pitot tube tilted up. But that means that as you put thte nose down for higher speeds, the ASI will over read more, than with the nose up at low speeds. If not done yet, do fit a static pickup and dine to your instruments.
?
Cheers,
?
Peter Stuy




Re: X-AIR CENTRAL Fw: 2si 690L-70 report

Bill Magrini
 

When will you fit the engine on the Xair?

Bill

-----Original Message-----
From: Richard Stubbs <richard@...>
To: X-Air_Ultralight_Aircraft@...
<X-Air_Ultralight_Aircraft@...>
Date: Monday, June 26, 2000 6:34 AM
Subject: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Fw: 2si 690L-70 report




----- Original Message -----
From: Richard Stubbs <richard@...>
To: <misasa@...>
Sent: 26 June 2000 09:08
Subject: 2si 690L-70 report


Hi everyone

Please find attached a report on the 2SI 690L-70 motor we are busy
working
on.
I will be happy to answer any questions. Our new website can be viewed
prior
to being hosted officially at www.icon.co.za/~sergiol/xair.

Best regards now

Richard Stubbs.
------------------------------------------------------------------------
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Re: X-AIR CENTRAL Fw: 2si 690L-70 report

Al's Partybox
 

开云体育

Hi Richard,
Allan From Western Australia you said a lot cheaper than ROTAX will? i sell my 582 ( 100 Hrs ) on a X-AIR
What will it cost in Australia???/////////
Keep A the good work..
Allan Grigo
?
?

----- Original Message -----
Sent: Monday, 26 June 2000 3:09 PM
Subject: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Fw: 2si 690L-70 report



----- Original Message -----
From: Richard Stubbs <richard@...>
To: <misasa@...>
Sent: 26 June 2000 09:08
Subject: 2si 690L-70 report


> Hi everyone
>
> Please find attached a report on the 2SI 690L-70 motor we are busy working
> on.
> I will be happy to answer any questions. Our new website can be viewed
prior
> to being hosted officially at www.icon.co.za/~sergiol/xair.
>
> Best regards now
>
> Richard Stubbs.
>




Re: X-AIR CENTRAL Re: Questions about the Xair F

Joel K.
 

My experience with the Hirth 2706 corroborates yours:
if you assume that a 582 produces 65 true BHP, I would
rate the 2706 at 59-60 only.
Regards.
Joel

__________________________________________________
Do You Yahoo!?
Get Yahoo! Mail - Free email you can access from anywhere!


Re: X-AIR CENTRAL Re: Questions about the Xair F

Bill Magrini
 

So what's your recommendation, change to the 582?

-----Original Message-----
From: Joel K. <k_joel@...>
To: X-Air_Ultralight_Aircraft@...
<X-Air_Ultralight_Aircraft@...>
Date: Tuesday, June 27, 2000 3:07 PM
Subject: Re: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Re: Questions about
the Xair F


My experience with the Hirth 2706 corroborates yours:
if you assume that a 582 produces 65 true BHP, I would
rate the 2706 at 59-60 only.
Regards.
Joel

__________________________________________________
Do You Yahoo!?
Get Yahoo! Mail - Free email you can access from anywhere!


------------------------------------------------------------------------
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------------------------------------------------------------------------






Re: X-AIR CENTRAL AFRICAN RELEASE!!!!!!!

Tony Stiller
 

If you are having trouble accessing the web site listed below, try:

cheers
Tony

At 09:13 PM 6/30/00 +0200, you wrote:
Hi All

Some time ago I advised Michael Coates of a very comprehensive locally
produced instrument that I was busy testing on my X-Air. I'm very pleased to
report that the designer Phillip Van Heen is now satisfied that he has
ironed out all the pre-release bugs on his Skydat GX1 system. It's now ready
for distribution. Lets be honest, the "electrics component" involved in the
build process still creates the biggest stumbling block towards finishing
your X-Air in anything close to 100hrs and is the least satisfying. Why?
Because if you do it well, none of it should be evident! Only you will ever
appreciate what it took in time, effort and detail to ensure that every wire
was beautifully soldered, crimped, insulated and where possible - hidden! I
don't doubt for a moment that the more conventional amoung us might prefer
round guages that resemble Microsoft Simulator but surely, if you wanted to
pilot a Boeing dashboard, why fly 'Microlights'. This system is it!
Affordable (+/- $ 1000 US complete), lightweight, trick, easy to install and
very comprehensive. I rest my case. .

My best regards now


Richard Stubbs.
-----Original Message-----
From: Bill Magrini <magriniw@...>
To: X-Air_Ultralight_Aircraft@...
<X-Air_Ultralight_Aircraft@...>
Date: Tuesday, June 27, 2000 04:42
Subject: Re: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Fw: 2si 690L-70
report


When will you fit the engine on the Xair?

Bill

-----Original Message-----
From: Richard Stubbs <richard@...>
To: X-Air_Ultralight_Aircraft@...
<X-Air_Ultralight_Aircraft@...>
Date: Monday, June 26, 2000 6:34 AM
Subject: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Fw: 2si 690L-70 report




----- Original Message -----
From: Richard Stubbs <richard@...>
To: <misasa@...>
Sent: 26 June 2000 09:08
Subject: 2si 690L-70 report


Hi everyone

Please find attached a report on the 2SI 690L-70 motor we are busy
working
on.
I will be happy to answer any questions. Our new website can be viewed
prior
to being hosted officially at www.icon.co.za/~sergiol/xair.

Best regards now

Richard Stubbs.
------------------------------------------------------------------------
Get a NextCard Visa, in 30 seconds!
1. Fill in the brief application
2. Receive approval decision within 30 seconds
3. Get rates as low as 2.9% Intro or 9.9% Fixed APR

------------------------------------------------------------------------





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Aerial Mount

Michael Coates
 

The Aerial is best positioned in a central location away from the tail
and the engine, we use a simple 90 degree stainless steel bracket off
the rear wing mounting bolt, the bracket is held in place with a pop
rivet to stop it rotating in flight because of the wind.

This position provides an excellent ground plane and the radio's perform
really well.

Thanks Michael X-Air Australia


Battery Mount close up

Michael Coates
 

I was asked for another photo of the battery carrier in place on the
aircraft, this one is held in with 6 cable ties rated at 54 kgs each.

With a 300 kg total rating it would take a 30 G impact to break them.

Thanks Michael Coates X-Air Australia