RE: Sig Hog Bipe build
I've got a Fox 74 in mine w/ 13x6 zinger. It tachs 10,900 rpm with 0% nitro. Fly 3/4 throttle all day. Might just take it vertical if I leaned it out. Had a ST75 in a four star, its not as powerful as the Fox and about 4 oz heavier. The ST 75 will be great in your bipe. I love this plane and you will too wether you put in a 60 or the 75. Definetly move the gear up but I would think an inch is too much. I'd try 1/4 to 1/2" I've heard some thoughts that the landing gear area is a little weak moving it up gets it further from the bulkhead that adds strength. With gear on orginal postion the plane likes to nose over on a grass feild taxi. I tried moving gear up 1/4" by drilling new holes in the gear. handling is improved but gear was shaky, ended up moving it back. I have to take off with full up elevator. The big 16 oz tank compounds the problem a smaller tank would help but I like to fly.