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F22 origin?

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F22 origin?

Old 06-28-2020, 08:51 PM
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Thai-fly
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Default F22 origin?

I inherited an F22 sometime ago but I have no information on its origin or any manuals to confirm possible flying characteristics, control throws and the CG. Can any one help? Dimensions and construction detail is contained in a post below.


Last edited by Thai-fly; 06-29-2020 at 04:23 PM. Reason: Additional information
Old 06-29-2020, 08:31 AM
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Auburn02
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I'd say your best bet to finding that answer will be to provide construction composition and dimensions.
Old 06-29-2020, 08:39 AM
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Thai-fly
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Good point. Will do.
Wing span is 1.44 meters
Overall length is 2.0 meters
Turbine is 8.5 kg (Jets Munt)
The model is all fiberglass, and appears to have been painted in the mound.
Based on the internal construction which has foam cored carbon fiber bulkheads my guess is that this was a kit designed to be finished by the customer. (I could be wrong here?)
No working airlerons or rudders. Control surface is elevons.

Last edited by Thai-fly; 06-29-2020 at 04:22 PM.
Old 06-30-2020, 12:44 AM
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jimibar
 
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It is an F22 from Cristen Diffusion :
Christen Diffusion - Votre spécialiste Jet R/C

That was my first jet, it flies really well. If you have questions, let me know.
Old 06-30-2020, 02:31 AM
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Thai-fly
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Thank you for the information and link. Do you recall what the CG was and approx control deflections. Also interested in the landing phase. No flaps but did you mix in some flap or does it fly slow enough not to need them.
thanks again!
Old 06-30-2020, 05:20 AM
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Hey TF,

Just for confirmation, the tanks are 2 plasma bags in each wings ? No kevlar or fiber tanks, is it correct ?
No flaps for the landing, the plane is slow enough for a nice landing.
For the CG, I'll get the manual for you, I sold the plane to a friend and he has the manual, I'll do you a copy.

Just something to keep in mind, don't do the maiden with a lot of cross wind, the F22 has huge rudder surface and without rudder control it can be tricky to manage.
Old 06-30-2020, 05:33 AM
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Thai-fly
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Yes, tanks are two plasma bags. One in each wing. Thanks for your help and advice. At this time of year we do have an annoying cross wind at our flying site. A copy of the manual would be awesome. Many thanks. Your help very much appreciated.
Old 07-05-2020, 11:51 PM
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Originally Posted by Thai-fly View Post
Yes, tanks are two plasma bags. One in each wing. Thanks for your help and advice. At this time of year we do have an annoying cross wind at our flying site. A copy of the manual would be awesome. Many thanks. Your help very much appreciated.
Hey TF,

Ok here are the setup details :

-Elevator throws : +/-40mm
-Ailerons (tailerons) : +/-25mm

Elevons are in neutral position when aligned with the horizontal plan of the wings.
CG : tanks FULL and landing gear extended : 130mm at the back of the front hatch

With a 90 type motor, fill tanks with 2.5 liters
With a 140 or 160 size, fill tanks with 3 liters

Attached is the manual in french.
Let me know if I can help.

Regards,

Jim

Old 07-06-2020, 01:51 AM
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Thai-fly
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Excellent, thank you Jim.

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