need help please,i have a db models ,double rotor autogyro
from the 1970 s I loaned the plans ,and never got them back
ive been trying to get it flying again but its been a long time
since I last flew it .I cant remember where the cg was suposed
to be.I would be gratefull for any information.[]
thanks kenny,

Hi. Can you post a pic of it?

I have the RCM&E magazine dated November 1987 which has the article on the DB Gyrace. The CG is about 25% of the way back from the LE of the wing - no more!
Colin

Thanks thtoyman.Icant post pictures,I havent got that far
with computors yet.
Thanks Colin.I will try 25%. from what i can remember
it was very criticle of the cg.The gyro had a small wing\
about 25 ins span. The rotors 4 blade 24 ins dia.
The rotors are at each end of the wing,on the leading edge.
It also has a T tail.
thank you , kenny.

Aditionaly
I had been told by someone That it should balance at the rotor
shaft, but that does not work,It flys like its nose heavy.
3 feet off the ground with lots of up elevator.Give it more up and
it mushes into the ground.Ill try 25% and see.

tintrax


HI . Any way you can post it here?

Here is the best I can manage. Note that this is David Boddington`s `Gyrace`, not the plane referred to above, but same principles guess - & same designer. Fold in magazine page does not help the scanning either, the CG is shown by a small triangle about 1/4 way back from the LE.
Hope this helps.

Thanks. It does help alot.

Larry,
It's right where I told you it was.

Good Luck,
Jim

Hi Jim. Just re checking. I lost where I wrote it down at. Keep a eye open for the US mail. any day now. Thanks

Looks good,will try the old one and a new lighter version.
this weekend .
thankyou .kenny.

cg is 73mm back and throw 15mm on ele and 20 mm on rudder with blades turning in to the middle

just incase any one new looks at this post

but great to fly