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20cc hovered mine just fine and pulled it out of a hover but nothing ballistic. That being said the Sbach65 I had was one of my favorite slabs I ever owned.
 
stronglite said:
Hey bro's
Hope y'all surviving covid lockdown by making slabs! I bought some used Sbach wings and elevators and decided to build a 65" profile Sbach fuse (thanks BALSABRO for the plans, what a champion!)
Hopefully the ailerons being part of the airfoil of the wings I bought counteracts the 236in² less wing area of the wings in plans with flat ailerons.
I was planning to use a OS GT33 gasser, but thats way too powerful right, is 20cc enough to hover?
Couple of issues to fix, but mostly finished!
Cheers guys
Sam
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I have this plane with an is 22Gt (supposed to be more power than the DLE) will pull out but just barely. Not bro power by any measure.
 
Construction

I am going to stick with the wing joiner block system, despite the earlier problems with the Sb45. Now that we have everything worked out I am sure this way is better than the wing tube method. Transferring the fuse load to the wing directly at the wing spars has to be better than transferring it through a tube and 2 or 3 plywood ribs.

I have decided to go with a fuse width of 5/8". A 5/8" tube is almost the same strength as 2 1/2" tubes and lighter as well, and a 3/4" tube would be way more than is needed for a 65 size plane.

I am constantly surprised at how few scratch builders there are here especially since our planes have such a high mortality rate. One would think that with the high cost of kits and arfs in the larger sizes that many would do it for the cost savings alone. I ordered more than enough wood from Clay at The Balsa Store to build two Sb65's and the cost was only about $80.00.

The only difference between a scratch built and a kit is a few parts to cut out, on all the Sbachs I have tried to keep the amount of cut parts to a minimum,

To cut out a kit all you really need is two power tools, a scroll saw and a small 8" drill press. They do not have to be anything special, you can probably get both of them on sale from Harbor Freight for about $120. With 65 size kits costing over $150 one could almost save enough on one scratch build to pay for the tools.
Plans for the SBACH profile
pete@therundels.com
 
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