Wing bolts
 

I would like to do away withe the rubber bands that hold the wing in place in my Telemaster 40. Do you suggest two wing bolts or four? If the answer is two - do you locate them in the center of the wing or towards the leading edge? Thank for your suggestions.

RE: Wing bolts
 

The accepted, usual manner is to use 2- 1/4x20 nylon bolts close to tr. edge of wing; and a 1/4 inch pc.of dowel centered in leading edge that slides into a 1/4 inch hole in fuselage former. This former must be reinforced with 1/8 inch plywood in that area where hole is drilled. Definitely a better way than rubber bands.Perhaps you can find someone that has this for you to check it out, or cosult some plans.

RE: Wing bolts
 

Ditto to TedMO. If you can't use the dowels in the front then go with a 4 bold system. 2 near the EE and 2 near the TE.

RE: Wing bolts
 

Forgot to mention that you must also reinforce the area at tr. edge were the bolts will go through.

RE: Wing bolts
 

Boy!!!! how could you forget that. But, I did too

RE: Wing bolts
 

Thanks for the quick replies - it all makes perfect sense. Can I just glue a piece of ply to the frame where the bolt receiver will mount or does there need to be something more substantial than that?

RE: Wing bolts
 

For the bolt plates I normally use 1/4 inch birch ply (from the LHS) not lite ply or 3ply soft wood. The Birch ply is 5 or seven ply.

It is epoxied at the aft trailing edge area and secured to the sides of the wing saddle and the back cabin area spreader. No T nuts are used, instead using the proper pilot drill for a quarter/20 tap drill through the wing and the birch plate below. When both are drilled the 1/420 tap is used to thread the holes in the birch ply and now thin CA is dripped on the new threads. The holes are opened up in the wing to 1/4 inch or just over.

I recently compled this installation on my six engine telemaster and on a gentlemans stock senior Telemaster. For the Six Pack I choose to use double front pins and the stock big Telly I used a forward and aft bolt plates for four bolts. The single front pin will work just fine on your smaller airplane.

John

RE: Wing bolts
 

Chris: Since you don't seem to know how to do this I strongly suggest you contact someone that has that kind of wing bolt set up. There are a variety of ways to accomplish this but would require a very lengthy explanation here. There are several advantages to bolts as well as rubber bands. Main one with rubber bands is that in a crash the rubber bands will possibly break or shift enough to reduce the damage to wing. Hopefully you will be able to contact someone at your field, or club that can help you here. Unfortunetly this is one of the problems associated with ARF's. They lack instructions in regard to building methods.