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flat framed construction

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thread-bump for Bernie

Post  roddie on Mon Nov 21, 2016 8:26 pm

Hey ya'll. I hope some of you had a chance to go-over this thread. Bernie (Cox International) is willing to publish this concept in their quarterly e-magazine.

Richard (RKflyer) applied the concept.. to a couple of builds in this thread. I think you'd agree that they look great!

Just another point to make.. Two Cents  There are lots of sheet-wing (flat-wing..) 1/2A (as well as 1/4A..) airplane designs out there to build. Framing that wing can save on balsa. It also affords the application of a spar. Multiple clean-fitting frame pieces, make a flat-wing (frame) less-resistant to warping.. because of multiple grain-direction between the pieces. My flat-wing panels were all covered with TF Mono-Kote.. which is still drum-tight after 25 years. I can't speak for other covering-methods. This construction-method wouldn't warrant a doped rubbed-out finish any more than any little solid sheet-wing build would. It does provide for a different-approach to just butting two sheets of balsa together.. and trimming the perimeter to form the wing-profile. I installed a 1/8" x 1/2" stub-spar made from dark hardwood (walnut possibly) in my Rare Bear's wing. It was basically the leading-edge of the wing. I needed a scale/wing-mounted landing gear. This required making separate right and left gear-blocks.. also from hardwood.



The blocks were mounted to the bottom of that hardwood spar, to absorb the shock of a hard landing. I used to have a "one-method" approach to attaching 1/2A landing-gear. It was a single inverted "V-bent" music-wire gear, running-through the front of the wing-slot in the fuse.. and anchored by straps with screws through the ply fuse-doublers. That's the age-old approach to gear-installation on a c/l profile model.. that has gear.  Laughing  Plenty of flyers don't want landing-gear on their model. That's fine. A hard strip-wood spar in their wing will provide rigidity.. and could also serve as the ultimate bellcrank-mount.
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Re: flat framed construction

Post  RknRusty on Tue Nov 22, 2016 3:05 am

You may discover you can actually make rolling landings without the usual 1/2A nose-over if the grass is reasonably smooth. I'll be interested to see how that works.
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Re: flat framed construction

Post  gcb on Tue Nov 22, 2016 7:05 am

RknRusty wrote:You may discover you can actually make rolling landings without the usual 1/2A nose-over if the grass is reasonably smooth. I'll be interested to see how that works.
Rusty

What...and abandon the traditional "bounce 'n flip" landings made famous by "hollow logs" being flown over grass? Very Happy Very Happy Cool

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Re: flat framed construction

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