I flew a new Bostonian at the Bong Eagles Indoor meet in Wisconsin on March 13 and I posted an album of pictures of it on this site, including some construction photos, today. The plane weighs 12 grams without rubber and has a pop bottle prop from the Beancraft Bonanza plans (Model Builder '86). It's a shorter conventional tailed version of the Bonanza. I also took a couple ribs out of the wing. As I mentioned in my earlier query about Bostonians, it weighed 5 grams before covering, adding gear and nose block.
The flying went OK for a short motor. It wouldn't climb with 3/32 inch Tan sport from FAI. It got up to about 20 feet with 1/8 inch ( an 11 inch loop with about 10 inch peg to prop hook and 800 turns). Flights were about 45 seconds. It balanced close to the spar without ballast, and flew level during mid run. I needed to shim the nose block a little to get it to climb. I might have been a little over generous with the down thrust originaly.
This is no where near what it takes to win at the Bong Eagles meets, so I probably need to add more lightness and maybe more rubber. I think I can make 60 seconds with a 14 inch loop. What's my next step?
I bushed the balsa wheels with some 1/16 inch O.D. brass tubing, but they still wobble. Would adding Teflon tubing to the ends of the 0.020 inch music wire gear help? The Patriot uses syringe needle tubing for a better fit.
Finally, I've got a normal flying Bostonian. It's not beating the time of my Markos Double Whammy, but that's another story.
Keep 'em flying
Joe
Received on Wed Mar 16 2011 - 14:54:16 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:46 CET