Thread: Gallery Just Jimmie Allen models
View Single Post
Old Sep 04, 2012, 10:04 AM
Pat Daily is offline
Find More Posts by Pat Daily
Registered User
Pat Daily's Avatar
United States, VA, Chesterfield
Joined Mar 2001
5,583 Posts

My Jimmy Allen Parasol (or Pursuit) weighs about 69 grams empty and I am currently flying it with a 9 inch Paulonia wood prop and about 10 ft of 1/4 inch rubber (4 stranded and fairly tightly braided motor--i.e., 400 turns before braiding) which weighs about 20 grams or about 22% rubber of the flying weight. I have not yet wound it up all the way, but I almost lost it with 1400 winds in it.

Earlier I was using a 3/16 motor of similar length with an 8 inch plastic Peck prop. It flew nicely but with a gentler climb.

Remember, roughly 1/4 inch rubber weighs 2 grams per foot, 3/16 is 1.5 grams per foot, and 1/8 is 1 gram per foot.

I am trying to get to the 25%or higher percent rubber as a total of the flying weight.

One other thing--I covered the fuselage sides and bottom with airspan -- it is much tougher than japanese tissue and has held up for 10 years. The rest of the plane is covered in tissue with a coat of thinned Sig litecoat dope and then airbrushed with acrylic colors.

Also don't forget about 5 degrees of down thrust and about 3 degrees of right thrust as a starting point. You may have to adjust later. Test glide it with about 100 winds--it should be a flat glide --if not add nose weight until it is a nice flat descending glide.
Pat Daily is offline Find More Posts by Pat Daily
Last edited by Pat Daily; Sep 04, 2012 at 10:11 AM.
Reply With Quote