Re: Joe's Basic Bostonian

From: joemargbartek <j.bartek_at_sbcglobal.net>
Date: Thu, 22 Nov 2012 03:45:07 -0000

Had a good time at Racine, WI, on Sunday at the Bong Eagles' Indoor Meet (Category II). Had a decent outing with my Bostonian, getting two flights of about a minute each. It weighs 14 grams with rubbber, which is heavy for indoor rules. I put 1080 turns into an 11" loop (2.1 grams) of 1/8" Tan Sport rubber driving the 6" diameter home made prop with soda bottle blades to get 60 seconds. I solved the ROG problem by adding Peck wheels which didn't wobble. I'm adding an in flight picture to my photo album.

Tony Telford won the meet averaging 80 seconds with a nifty looking (vertical box) yellow ship. Picture is on the Bong Eagles site.

Joe

--- In Indoor_Construction_at_yahoogroups.com, "joemargbartek" <j.bartek@...> wrote:
>
> 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 Nov 21 2012 - 19:45:09 CET