trying2fly
If anyone has an idea of where the CG is on the Tomhe F-22 please let me know..These jets are so finicky on the CG that even if you know where it should be, they frequently need to be adjusted after their maiden flights(provided there is enough left to adjust)! If anyone knows please advise by letting me know how far it is from the motor mount forward. Thanx so much!! Ps The pin I stuck in the top....forward of the motor mount is where I was considering the CG placement???F-22 Profile  CG 001.JPG  F-22 Profile  CG 002.JPG  F-22 Profile  CG 003.JPG 
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JTiger
I haven't built that particular plane but to me it looks like your pin may be a little far back. If I were to take a guess I'd go for the seam just in front of your pin or a little farther forward than it. That's about where I put it when I built an RCP F-22v1 and it worked pretty well.
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Airforce101
If the plans don't say where cg should be, then find some tall grass and chuck it! (In more official terms, it is called a glide test...)
My avatar is what I look like after a "landing"...
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Airforce101
Oh and yeah, I would say that pin is too far back. I would say halfway between the two tabs (so just forward of the seam in your wingplate) would be a good start. It's kind of an educated guess, biassed to being a little noseheavy, which is better than tailheavy...
My avatar is what I look like after a "landing"...
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FlyteTime
I looked it up for you and found info on the cg at rc.tomhe.net/f-22 Under the table of contents, click on data and it shows what you need. It says 3.25 inches back from the front of the main wing.

rc.tomhe.net/f-22
I'd rather have a bottle in front of me than a frontal lobotomy.
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trying2fly
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I looked it up for you and found info on the cg at rc.tomhe.net/f-22 Under the table of contents, click on data and it shows what you need. It says 3.25 inches back from the front of the main wing.

rc.tomhe.net/f-22

You are absolutely tops!!!thank you
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trying2fly
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If the plans don't say where cg should be, then find some tall grass and chuck it! (In more official terms, it is called a glide test...)

I am going to take your advice and do this regardless of where I start with the CG....great idea chas
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trying2fly
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I looked it up for you and found info on the cg at rc.tomhe.net/f-22 Under the table of contents, click on data and it shows what you need. It says 3.25 inches back from the front of the main wing.

rc.tomhe.net/f-22

I read it so rapidly that I went on to the next line.....I took it as "8.25cm(3.25 inches) back from the front of the main wing propeller slot. If I had any sense at all I would not have added "propeller slot". You told me correctly and I thank you...I know it is frustrating to give sound advice and treat it like I have. Thanx again!!
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FlyteTime
No worries at all my friend. That's what this forum is all about, good peeps helping good peeps! Please let us know how it works out for you.
I'd rather have a bottle in front of me than a frontal lobotomy.
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Gvdh
This is mine... built with corro. Deviated from the plan to adopt for corro. My latest version even incorporates "technology" learned here on RCP like toe-in fins and fixed leading edge flaps!
Very good flyer. Even when tail heavy the are very controllable with the thrust vectoring.
Scratch building with anything that works!
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Wildthing
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This is mine... built with corro. Deviated from the plan to adopt for corro. My latest version even incorporates "technology" learned here on RCP like toe-in fins and fixed leading edge flaps!
Very good flyer. Even when tail heavy the are very controllable with the thrust vectoring.

That looks really good being out of corro
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