Comment

Comment by Robert Pelland on March 15, 2009 at 4:25pm

Chumphol, I to like the look's, and that is the reason I am doing every trailing surface in this way. If you look over the 701 plans, you will see that every trailing surface on the plane, wings, flaperons, elevator, etc, are all done by soft riveting two sheets together. As a side effect, it makes for a surface that is more often then not uneven, and most of the time, wavy from one end to the other.

As for the 750, every one of these same surfaces no longer is joinedwith rivets but rather a sheet that is folded over to create the trailing edge. This method guarantees that the edge will be absolutuly straight, without any waves, or bends of any kind.

I have not spoken to the designer, nor to any of the tech people at Zenith, but I am convinced this is the reason the change in desige was made.

As for the other parts on my 701, that will all be done ( including the main wings ) in this manner.

Robert

Comment by Robert Pelland on March 15, 2009 at 4:14pm

Thank you Elizabeth, I always love compliments, expecially when they come from beautiful women. :o)

Since this cut is on the top surface, I could not bring myself to attack it with the edge butchering snips. To remove the section I started by drilling out the corner holes in the correct place, and spent more then 1.5 hours with my trusty Ofla 800, and scored all the lines until the section ( both top & bottom ) almost fell out by itself. It's time consuming, but by being very careful, it can be done without damaging the surrounding surface.

Robert

Comment by Jonathan Porter on March 15, 2009 at 4:02pm

Looks good. When we cut out this shape we use two snips at the same time to rought cut, allowing the material to move up in the middle - it works great and avoids the tensions in the sheet. How did you cut yours?

Comment by Chumphol Sirinavin on March 15, 2009 at 12:34pm

The trailing edge looks much cleaner than other CH 701's. Very neat and clean look..

Comment by Robert Pelland on March 15, 2009 at 8:02am

I forgot to mention that this elevator is for my 701, and that it's construction does not follow the factory recommended procedure for this aircraft, but is closer to the assembly of the new CH-750. E-me off line for details.

Robert Pelland
The 701 & 750 Scratch

Comment by Mario Pratte on March 15, 2009 at 8:01am

veru beautiful Robert!