I just got an old astro hog, that probalby has not been flown in 15 years. It currently has one servo in the center of the wing driving the ailerons. Is it worth it to try to modify that? The wing currently is attached with rubber bands, should I try to fix that, and if not what size rubber bands and how many? I stretched a couple 64's on there, but they seem very tight. should I use stadard servos on the rudder and elevators? I am thinking about changing the engine from an old 45 to a webra 61.

Thanks

Jon

Installing two servos in the wing means you will have to remove covering to route wires. As for wing attachment, SIG has #67 (#68?) bands available. What .45 is currently installed? IMO, the Webra is overkill but you can always throttle back. Is it the current SIG or is it a Berkeley? Check out the vintage forum here for some Astro Hog threads.

My Astro Hog was 20 years old when I got it.
It has a single servo for the ailerons and it is plenty.

If the hinges are CA type make sure to check them extensively before each flight and never forget to do it.
I was lucky, when one of the ailerons fell off I had asked one of the instructors to fly the plane and evaluate it to make suggestions on CG, control throws, and general capabilities.
He was knife edging and one of the ailerons popped off, he calmaly landed the plane and upon further inspection every remaining hinge had failed or was about to.
I was lucky the elevator did not fall off because it could have, not a lot that anyone can do without an elevator.

Thanks for the help, after doing mnore research with the links that you sent, I believe that I have an old Berekely plane, I know that I have to make a new rudder and rehinge the elevator for sure.

Thanks

I don't believe Sig's Astro Hog ever had a wing held on with rubberbands. I have had 3 Sig Astro Hog's with doped finishes.Nothing flies like a Hog. They are alot of fun. I built the last one with half of the diehedial and a larger rudder. It will hold continuous knifedge powered with a YS91. FUN airplane. Enjoy!!

The first Astro- Hogs were designed for 2 channel radios and the wing was held on with rubber bands that was the reason for all the diheldral. The orignal had 31/2 inches per wing.Smitty