RCU Forums - View Single Post - PT40 wing advice
View Single Post
Old 04-15-2003 | 01:12 AM
  #3  
CafeenMan
Senior Member
 
Joined: Jan 2003
Posts: 4,734
Likes: 0
Received 0 Likes on 0 Posts
From: Spring Hill, FL
Default PT40 wing advice

WhiteKnuckles - The idea that rubber bands will prevent damage in a crash is not true for the most part. If the wing gets twisted the fuselage will be damaged regardless of attachment method.

The real reason to use rubber bands is because many beginning builders have problems drilling the holes for wing bolts accurately. It's hard to go wrong with dowels and rubber bands.

But like bdphil said, they're messy, a continual expense and mess up the covering. Additionally the rubber band mounting method weighs more than using nylon bolts, but the difference is probably only a few grams.

My vote is that if you think you can successfully drill and tap for the bolts then go with that method.

A couple of tips:

1) Before you do anything get the wing on straight and level. Make a couple reference marks on the wing and fuselage.

2) Measure the exact center of the blocks in the fuselage for the bolts. Transfer those marks to the wing. Actually, you want to be centered back and forth, but slightly to the rear of center because of the way the bolts enter the blocks.

3) Drill the wing (3/16" bit for 1/4" bolts) with the drill perpendicular to where the bolt head will contact the wing. That means the bolt will go into the block at an angle.

4) Seek experienced help to step you through it in person before you attempt it on your own.