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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
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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 |
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:
Thanks for your help.
?
Bill Magrini
Xair - Virginia/Maryland
? -----Original Message----- >I really don't
know ??,? there are too many variables here for me to work out.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 >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.
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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, |
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 HirthF30, 2 stroke, 4 cylinder 80 HP engine to an Xair? Would the fuel |
Re: X-AIR CENTRAL Re: Questions about the Xair F
Michael Coates
?
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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: |
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.
|
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
?
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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. |
Re: X-AIR CENTRAL Re: Questions about the Xair F
Bill Magrini
开云体育?
|
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
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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----- |
Fw: 2si 690L-70 report
Richard Stubbs
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----- Original Message -----
From: Richard Stubbs <richard@...> To: <misasa@...> Sent: 26 June 2000 09:08 Subject: 2si 690L-70 report Hi everyoneprior to being hosted officially at www.icon.co.za/~sergiol/xair. |
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
|
Re: X-AIR CENTRAL Fw: 2si 690L-70 report
Bill Magrini
When will you fit the engine on the Xair?
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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 working on.prior |
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
?
?
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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?
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-----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: |
Re: X-AIR CENTRAL AFRICAN RELEASE!!!!!!!
Tony Stiller
If you are having trouble accessing the web site listed below, try:
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cheers Tony At 09:13 PM 6/30/00 +0200, you wrote:
Hi All |
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 |
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