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Our plane has flown! Small problem though...
XAir Main
Hi Guys,
I flew my plane today! All was well except that I'm getting high EGTs. I'm running a 68" GSC wood prop with 16 degrees of pitch and a Hirth 2706. Both plugs are brown and not wet. The needle is a 15K2 and the main jets are 160s. I'm getting 1300 degrees on the EGTs at 6100 RPM and it settles to about 1200 at cruise (4200 RPM) and 400 on the CHTs either way (I did see the back cylinder go to 500 once). We've tried 170 main jets hoping to run it richer to get the EGTs down but it made no difference on a second circuit. Judging by the plugs we are running just fine. The engine seems to running very well with no indication of wanting to quit (I know go ahead and laugh, I know Murphy's Law very well thank you!) I'm using the Mikuni pump and I also have an electric pump but have not found that it makes a difference. We are wondering at this point if the location of the EGT probes is causing a high reading. I welded the bosses about 80 MM from the head gasket (verified with pictures taken of other Hirths at Sun N Fun). My assistant tells me that the further away from the engine the probes are the higher the reading because the fuel is still burning on exhaust. I've looked at a 503 and 582 and the probes are much closer (more like 30 mm) to the head. We are thinking about hooking up an EIS with their probes to see if they are reading properly. I'm using Westach gauges and probes. Anyone have any suggestions otherwise? -- Trevor Page X-Air Ontario Dealer tpage@... ____________________________ Free Email/SMTP/POP, , Hosting yourname@... |
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Re: X-AIR CENTRAL Our plane has flown! Small problem though...
Tony Stiller
Gooday Trevor
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Good to have the plane in the air isn't it, now is the time to take in that feeling and enjoy flying. Cant help with the EGT, sorry. cheers Tony At 03:56 PM 7/2/00 -0400, you wrote:
Hi Guys, |
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Re: X-AIR CENTRAL Xair Web Site
Tony Stiller
All the best with your new site and happy flying
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cheers Tony Stiller 10 Caryota Street Nambour?? Q?? 4560 Tel: +61 7 54417051 Fax: +61 7 54763335 Mobile: 0427 766827 At 04:36 AM 7/3/00 +0000, you wrote: Come see my website at |
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Re: X-AIR CENTRAL Xair Web Site
Bill Magrini
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Re: X-AIR CENTRAL Re: ETG Probes & their positioning
Xair Ontario
Thanks Richard,
I know I have the probe bosses in the right place as I've measured them from factory units along with photographs as proof. I've just been informed the engine will run hot for the first 25 hours or so because of the Nicasil coating. 1300 degrees is not to be passed but 1200 is normal at first. I'm still going to hook up an E.I.S. to see if they read the EGTs any different. -- Trevor Page X-Air Ontario Dealer tpage@... From: "Richard Stubbs" <richard@...> ____________________________ Free Email/SMTP/POP, , Hosting yourname@... |
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Re: X-AIR CENTRAL Re: Xair Web Site
Gday again.... just a quick note: when adding links etc put in the full
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address, like This will make the address a link by adding the and you can go directly to it by mouse click, the other way you need to type it all in and any mistakes will stop your customer / enquiry from finding it. One other thing.... when replying to a message delete all the advertising from the bottom, otherwise we end up with messages with four or five adds on the bottom, this not only takes up space but it also takes longer to download our messages. Hope this helps Thanks Michael magriniw@... wrote: I just noticed my website doesn't load because of an inadvertent |
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Re: ETG Probes & their positioning
Richard Stubbs
Hello Trevor
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As a general rule of thum, the position of your EGT probes needs to be 100mm from the piston skirt. Establish the distance using a vernier from the piston skirt to the end of your exhaust port and then add the difference along your exhaust manifold to make up the 100mm not forgetting to include the thickness of your gaskets. I don't know the Hirth motor although it's success here in South Africa was short lived. I would like to suggest that you contact the manufacturers of the "Hornet" fixed wing (the one that resembles a Challenger) as this company has used the Hirth engine as standard fare for many years and would seem happy with the product. Best of luck Richard Stubbs. -----Original Message-----
From: XAir Main <tpage@...> To: X-Air_Ultralight_Aircraft@... <X-Air_Ultralight_Aircraft@...> Date: Sunday, July 02, 2000 09:56 Subject: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Our plane has flown! Smallproblem though... Hi Guys, I flew my plane today! All was well except that I'm getting high EGTs. I'm running a 68" GSC wood prop with 16 degrees of pitch and a Hirth 2706. Both plugs are brown and not wet. The needle is a 15K2 and the main jets are 160s. I'm getting 1300 degrees on the EGTs at 6100 RPM and it settles to about 1200 at cruise (4200 RPM) and 400 on the CHTs either way (I did see the back cylinder go to 500 once). We've tried 170 main jets hoping to run it richer to get the EGTs down but it made no difference on a second circuit. Judging by the plugs we are running just fine. The engine seems to running very well with no indication of wanting to quit (I know go ahead and laugh, I know Murphy's Law very well thank you!) I'm using the Mikuni pump and I also have an electric pump but have not found that it makes a difference. We are wondering at this point if the location of the EGT probes is causing a high reading. I welded the bosses about 80 MM from the head gasket (verified with pictures taken of other Hirths at Sun N Fun). My assistant tells me that the further away from the engine the probes are the higher the reading because the fuel is still burning on exhaust. I've looked at a 503 and 582 and the probes are much closer (more like 30 mm) to the head. We are thinking about hooking up an EIS with their probes to see if they are reading properly. I'm using Westach gauges and probes. Anyone have any suggestions otherwise? -- Trevor Page X-Air Ontario Dealer tpage@... ____________________________ Free Email/SMTP/POP, , Hosting yourname@... ------------------------------------------------------------------------ Explore the popular High-End Room - Go To Where The Smart People Shop-uBid.com ------------------------------------------------------------------------ |
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How to set up the Ailerons
Michael Coates
Setting up the Ailerons is a very important part of trimming the
aircraft for balanced flight, we use the following method for quick set-up and find the aircraft flies perfectly. The attached pictures will compliment the text. Firstly this is a two person job.... forget it by yourself. Tie the control stick in the central position of the cockpit, tie it so it cant move when you pull on the ailerons further in the process. Place a straight edge or similar under each wing wedged up against the leading edge and trailing edge main tubes, the best position to do this adjustment is where the main struts attach to the wing, it is possible to tie them in position with some electricians tape or similar, the factory suggest aligning each aileron so they touch each straight edge but i have found through experiment that they are best if raised about 10 mm above the height of the straight edge. By raising the ailerons a little the plane flies better in the turns and does not suffer from the yaw problems that seem to happen in the standard position; i may be wrong but i think the plane flies faster with the ailerons lifted, something to do with reflex ??. To align the ailerons properly start with the ailerons in the right position and attach the bottom wires only, adjust the bottom wire with the turnbuckle to remove the slack, when you are satisfied with the position and tension you can then connect the top wires to the ailerons and adjust the turnbuckles to take out all the slack from the cables. Remove the string from the stick and remove the straight edges from under each wing and give the controls a good workout to check for proper operation, once satisfied position the stick centrally and replace the straight edges and check everything again, when your happy lock the turnbuckles and safety wire with a standard figure eight method. If the cables are to tight the controls will be stiff and notchy, to loose and they will be sloppy in flight, remember to use good quality silicone spray on the ends of the aileron and also on the two 'bearings' to reduce friction, finally do not over tighten the cap end bolts in the outboard ends of the wings because this will cause a lot of friction, and remember to safety wire them so they don't fall out. Any questions please send me an Email. Thanks Michael Coates X-Air Australia. |
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X-Air Weight and Balance Pictures
Michael Coates
It's very important to get the aircraft perfectly balanced for the best
performance, most of the aircraft in Australia that run Rotax 618's are at the nose heavy end of the acceptable range, some of the lighter engines like the 503's are at about the mid mark. I loaded a plane up to be at the aft end of the limits and found it to be very hard to fly so i would recommend from experience to keep it up the nose end. The weight and balance calcs are very simple with the information supplied with your kit, where most people come unstuck is in the actual methods used in weighing the aircraft, obviously the more accurate the better, but i have found a GOOD pair of bathroom scales does the job. By GOOD i mean an expensive pair that will read up to 135 kg's, most scales only go to 110 kg's and are not acceptable for this job as some of the weights are up to 120 kgs. The most important thing when weighing the aircraft is to keep the wheels level, i use some wood placed under the two wheels not being weighed, remember to chock the plane because when she rolls of the wood it gets a good run up and can move up to two metres. With the other two wheels chocked place the scales under the third wheel and take the reading, please use a jack as shown in the attached pictures, if you roll the wheel up onto the scales they will probably bend in the middle and be useless, same goes for lowering the wheel onto the scales take it easy, if you just drop the wheel down you will end up with bent set of scales. To spread the load a bit better i use a piece of 6 mm think aluminium about 300 by 300 mm to spread the load and i find this works well. Remember to make sure wood is under the other two wheels or the balance and weights will be out considerably. Hop this helps, thanks Michael X-Air Australia. |
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Re: X-AIR CENTRAL Our plane has flown! Small problem though...
Bill Magrini
开云体育Hi Trevor,
?
Your main jets?are lower than mine.?
Mine are 180, I think.? That's what the book said, and I did not confirm it
as you have to take things apart to see it.? My needle is also 15K2, and my
needle jet is 2.78.? Why is your main jet so low?? Why would it not be
to factory specs?? Did you order and install a lower number (leaner)
jet?? Why?? The old settings show a 170 main jet being used, but I
would imagine you have a newer model engine and settings.? I would
definitely run at least the 170 jets.? But talk to Matt at Recreational
Power (a Hirth Distributor) and ask him about your EGT problem.? His number
is 1-800-583-3306.?
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Good luck,
?
Bill
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? -----Original Message----- >Hi
Guys,From: XAir Main <tpage@...> To: X-Air_Ultralight_Aircraft@... <X-Air_Ultralight_Aircraft@...> Date: Sunday, July 02, 2000 7:55 PM Subject: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Our plane has flown! Small problem though... > >I flew my plane today! > >All was well except that I'm getting high EGTs. I'm running a 68" GSC wood >prop with 16 degrees of pitch and a Hirth 2706. >Both plugs are brown and not wet. The needle is a 15K2 and the main jets are >160s. I'm getting 1300 degrees on the EGTs at 6100 RPM and it settles to >about 1200 at cruise (4200 RPM) and 400 on the CHTs either way (I did see >the back cylinder go to 500 once). We've tried 170 main jets hoping to run >it richer to get the EGTs down but it made no difference on a second >circuit. Judging by the plugs we are running just fine. The engine seems to >running very well with no indication of wanting to quit (I know go ahead and >laugh, I know Murphy's Law very well thank you!) > >I'm using the Mikuni pump and I also have an electric pump but have not >found that it makes a difference. We are wondering at this point if the >location of the EGT probes is causing a high reading. I welded the bosses >about 80 MM from the head gasket (verified with pictures taken of other >Hirths at Sun N Fun). My assistant tells me that the further away from the >engine the probes are the higher the reading because the fuel is still >burning on exhaust. I've looked at a 503 and 582 and the probes are much >closer (more like 30 mm) to the head. > >We are thinking about hooking up an EIS with their probes to see if they are >reading properly. I'm using Westach gauges and probes. >Anyone have any suggestions otherwise? > >-- >Trevor Page >X-Air Ontario Dealer >tpage@... > > > >____________________________ >Free Email/SMTP/POP, , Hosting yourname@... > >------------------------------------------------------------------------ >Explore the popular High-End Room - >Go To Where The Smart People Shop-uBid.com > >------------------------------------------------------------------------ > > > > > > |
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Re: X-AIR CENTRAL How to set up the Ailerons
Bill Magrini
Michael,
According to aircraft theory, if you raise both ailerons from neutral, you will increase both cruise and stall speeds. If you lower them, you will decrease them both. So you're right: If theory holds true, the plane should fly faster. I don't have a clue about why the plane would tend to yaw less. But the Xair manual said if you go positive, the plane will fly tail heavy, and if negative, the plane flies nose heavy. I understand your plane is on the nose heavy side, so the up aileron configuration, may counteract that somewhat. Of course this is only conjecture on my part as I don't really know. I do enough reading to make me dangerous. I just thought I'd throw my 2 cents in. By the way, your pic shows your aileron to be a finger width raised from the straight edge. I don't have near that much. I only have about 1/4 of an inch. Should I add more? Regards, Bill P.S. Here are some more pics of my Xair F. The first is my ailerons and flaps, (I have no idea where the stick was when i took the pic.) The second shows the Hirth setup. |
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Re: X-AIR CENTRAL Joining the wings together - good tip
Bill Magrini
开云体育Michael,
?
Can you fly the Xair without the fuselage
cloth?? How does it fly?? Is there more or less
drag?
?
Thanks,
?
Bill
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? -----Original Message----- >Another
quick tip when joining the two wings together.....? route theFrom: Michael Coates <xair@...> To: X-Air_Ultralight_Aircraft@... <X-Air_Ultralight_Aircraft@...> Date: Tuesday, July 04, 2000 10:31 PM Subject: [X-Air_Ultralight_Aircraft] X-AIR CENTRAL Joining the wings together - good tip >straps as normal and use small clips to hold the straps in place. > >When tensioning the wing pull up each strap and slowly work your way >around each tightening each strap a little bit at a time, if you try and >tighten the strap in just one go you will not get enough tension on the >fabric, so remember just a little bit at a time and you will get a >wrinkle free wing surface. > >The clips make it really easy, if possible you will need 8 clips, once >tight remove a clip and finish with a secure knot. > >Thanks Michael? X-Air Australia > > >------------------------------------------------------------------------ >Was the salesman clueless? Productopia has the answers. > >------------------------------------------------------------------------ > > > > > |
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Re: X-AIR CENTRAL Can the plane fly without the fastback
Peter Stuy
开云体育Don't do it: the cover
also serves as a part of the fin. And without it you might not have enough fin
and end up back to front.
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Peter
Stuy |
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Re: X-AIR CENTRAL Our plane has flown! Small problem though...
Xair Ontario
Thanks BIll, Matt said to run 180s as well so I will change them. The engine came with 160s nad came from Vancouver which has a higher elevation. Perhaps it was setup to run there?
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Anyhow, today is very nice out but a bit windy right now. I'm hoping it calms down to give it a try tonight! -- Trevor Page X-Air Ontario Dealer tpage@... http://www.xair-ontario.com
Hi Trevor, |
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Joining the wings together - good tip
Another quick tip when joining the two wings together..... route the
straps as normal and use small clips to hold the straps in place. When tensioning the wing pull up each strap and slowly work your way around each tightening each strap a little bit at a time, if you try and tighten the strap in just one go you will not get enough tension on the fabric, so remember just a little bit at a time and you will get a wrinkle free wing surface. The clips make it really easy, if possible you will need 8 clips, once tight remove a clip and finish with a secure knot. Thanks Michael X-Air Australia |
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Speedwing's new site
Xair Ontario
For those who thought I was too busy with my site, I've finished the new
site for Speedwing Aircraft (North American XAir Importer/Distributor) You can visit it at: Please update your bookmarks! -- Trevor Page X-Air Ontario Dealer tpage@... ____________________________ Free Email/SMTP/POP, , Hosting yourname@... |
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X-Air news group
开云体育Good day,
I am interested in joining your news group as I
am looking at purchasing
an X-Air in South Africa
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I look forward to hearing from you.
?
Regards
Rodney Caruana |
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