Scale BUSA Super Cub

[dhal22]

Very interesting! I’ve seen several envelopes sewn for full scale but I noticed something interesting on the drawing posted on the other thread.

I’ve taken a screenshot of that drawing and attached here. Seems that one side of the fabric is wrapped around the center stinger and the other side is glued to it, then covered with a tape.

I'm leaning to this approach..

 

[WMcNabb]

I'm leaning to this approach..

Take a read through the blogs of this model and see if they inspire any ideas…

Bob Benjamin Top Flite Stinson #22 - Fuselage covering w/ Stits

Bob Benjamin Top Flite Stinson - All entries

 

[TonyHallo]

I'd do the envelope method, Chip from F&M recommended it to me many years ago.

 

[dhal22]

The boot cowl section is 5 pieces, one on the bottom, two on each side that over lap on top since the front support wires meet at the center of the plane. The full scale is split at the top as well. The Cub may be different since there is inverted from the Super Cub.

View attachment 121878View attachment 121879View attachment 121881

Tony, where do I find the aluminum panels layout? I can't find anything.

 

[TonyHallo]

Check this out. Looks like it is two pieces split topp and bottom.

 

[TonyHallo]

Looking at photos of Cubs, they don't appear to have the additional aluminum panel bethid the boot cowl. Doubled sided carpet tape is used to hold panels in place as the screws are only going into balsa.

 

[dhal22]

I had previously covered the bottom of the fuselage so it is time for the envelope. A large piece of fabric is draped over the fuselage and pinned in place to mark the center stringer with a pencil. This is pinned to a another piece of similar sized fabric and sewed together on the line. Excess fabric is trimmed and then turned inside out finally fitted to the fuselage. The fabric is first glued to the center stringer and fin, then glued around the perimeter finally shrunk providing a very pleasing curvature at the fin.
I did make one prototype, on the first seam I didn't notice the bottom fabric had folded over and was sewn in three places, I able the salvage the top fabric but the bottom one got a little cut in it so it was replace.

View attachment 121764View attachment 121765View attachment 121766

Going to visit my mom next weekend. It just occurred to me that it would be a GREAT time to use her sewing machine skills……. I need to get a move on this idea……

 

[TonyHallo]

The method does produced a very nice fuselage to fin transisition.