stunthanger.com

Building Tips and technical articles. => Building techniques => Topic started by: Ty Marcucci on May 09, 2012, 06:22:03 PM

Title: Built in dihedral on tubes
Post by: Ty Marcucci on May 09, 2012, 06:22:03 PM
This is a first for me. I have built on tubes/rods before, but never with dihedral. I am building a Profile Bearcat, huge one, and the wing has dihedral. Using the same method used by Al Rabe for his planes.
Title: Re: Built in dihedral on tubes
Post by: Tim Wescott on May 09, 2012, 06:24:35 PM
Looks like it should work -- what's the tube material?
Title: Re: Built in dihedral on tubes
Post by: Avaiojet on May 09, 2012, 06:59:40 PM
Ty,

Nice!

How big is big?

Charles
Title: Re: Built in dihedral on tubes
Post by: Avaiojet on May 11, 2012, 11:05:31 AM
Ty,

You build neat, or do you clean up for the photos?

Power?

58" is not small.

The F8F isn't my favorite Warbird, but as the aircraft Al Williams used, it's close to the top of my list.

Great airplane and here's a nice scheme. It would be my first pick for a F8F.

Charles
Title: Re: Built in dihedral on tubes
Post by: Gene O'Keefe on May 11, 2012, 01:17:49 PM
I like the "raised" canopy....gives me ideas for future models. Thx !
Title: Re: Built in dihedral on tubes
Post by: Randy Powell on May 11, 2012, 05:36:20 PM
Pat Johnston has used this method forever. Pretty easy if you have laser cut ribs.
Title: Re: Built in dihedral on tubes
Post by: Bill Little on May 11, 2012, 06:00:24 PM
Aaron cut the ribs and punched the jig holes, himself, for a Classic Legal Rabe Bearcat.  Since then I have gotten laser cut ribs from Kyle for a Rabe Mustang II.  It really works well if everything is lined up correctly.

BIG Bear
RNMM/AMM
Title: Re: Built in dihedral on tubes
Post by: Randy Powell on May 12, 2012, 09:08:50 PM
Well, it can be done. Al did it for a lot of planes. But it ain't easy.
Title: Re: Built in dihedral on tubes
Post by: Mike Keville on May 12, 2012, 10:05:48 PM
. . . Great airplane and here's a nice scheme. It would be my first pick for a F8F.

Charles

It's already been done, many years ago, by Keith Trostle.....and quite successfully, as evidenced by his many wins in local, regional and national (Classic) events with the Al Williams paint scheme.
Title: Re: Built in dihedral on tubes
Post by: Avaiojet on May 13, 2012, 11:14:58 AM
You got that right. The tubes tend to be in the way at times. But talk about a straight wing. Only foam, lost foam or kept foam are as straight, but not as much "fun".  H^^ D>K

TY,

I never built a straight wing in my life. Even when I was cutting foam.  n~

Charles
Title: Re: Built in dihedral on tubes
Post by: Dan Bregar on May 14, 2012, 05:30:08 PM
Cheezz, TY. Why don't you quit layin around and build somethin !   LL~  Man, you are prolific aren't you.  I'm jealous.  I'm doing good if I build two airplanes a year. You are somethin else. Must be the Geretol.  LL~
Title: Re: Built in dihedral on tubes
Post by: Avaiojet on May 16, 2012, 06:23:06 PM
It's already been done, many years ago, by Keith Trostle.....and quite successfully, as evidenced by his many wins in local, regional and national (Classic) events with the Al Williams paint scheme.

Mike,

My favorite paint scheme on the F3F-1 actually the G22 flown by Al Williams. I have the fuselage framed up from an old Aristo Craft kit. I had Polks also but sold that eons ago. :-(

Well, not really framed up, but started.

If I had money I would commission you to paint the G22 for me. You do good work. Do you trade paintings for graphics? Didn't think so.  n~

Ty, I sure hope you pick that scheme.

Charles

Title: Re: Built in dihedral on tubes
Post by: EddyR on June 28, 2012, 10:17:06 AM
Ty     I have seen several of those profile Bearcats fly and the heavy ones fly the best. One at 70 ounces flew very well. The lightest one at 55 ounces was more like a glider. That big flat profile needs the weight to push through the wind. Use a strong 60 on it. If you use the ST/60 you don't need the motor on the inside to get it to run correct . Have the head fins removed and the heat will stay in the motor and it will run in a strong four cycle. The motor will not over heat. #^
Ed