RV7driver,


I have one of Jeff's QF III's and it is sweet. The spar buildup was one of the most interesting in the 39 years I have been in RC. I did mount a Kraft 61 and it did take some finesse, as the original KF had you replace the backplate of the engine with a flat plate that then was mounted to the firewall. I did not do it that way. I used a pair of old Sig aluminum T mounts cut down and I had to make recesses in firewall for the backplate screws to keep the spinner from being way out in front of the nose. Even then I had to add a couple 1/4" blocks to the front of the nose ring to fair things in to the spinner. Most modern 61's and the Kraft are longer backplate to the front of the thrust washer than the older Super Tigre's like the Blue Head and the original OS and Enya 61's.

I think the AX 55 would be an excellent choice.

Here is a link to my build article: http://www.fancyflying.150m.com/qwic_fly_iii_build.htm

I have a lot of detail pictures on the things I found interesting, harder to do or not explained well for some of us that never built an original.

Marty