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Post  TLAnderson on Sat Oct 26, 2019 7:32 pm

A long established hobby shop in Duluth, MN is going out of business. The owner is 79 years old, and has had enough, I guess. I stopped in there today for a last look around, and saw this hanging from the ceiling.

Unidentified 1/2A Combat Plane Combat10

Unidentified 1/2A Combat Plane Combat11

Unidentified 1/2A Combat Plane Combat12

Unidentified 1/2A Combat Plane Combat13


I asked the owner what he wanted for it. He said $30.00. I bought it. The engine was stuck, but a couple of shots of Ballistol in the exhaust port loosened it right up. Now it pops nicely when the prop is flipped.

The wingspan is 24". Chord is 5-3/4" The prop is a wood 6" Top Flite. Pitch unknown.

So, a few of questions.

What is it? How old is it? Is the engine a Black Widow? Do I dare fly it? Would you trust those string lead outs? I'd really hate to cut into the wing to replace the lead outs. The plane could be 50 years old. Will it fall apart if I try to fly it?

The engine has a metal back plate. I'm guessing 1960's? The plane looks like it was never flown. It's clean. No fuel stains or oil soaked wood.

Any information on the plane will be appreciated.
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Post  Marleysky on Sat Oct 26, 2019 9:48 pm

I’ll take the easy ones:
Yes, it is a Black Widow!
Yes, It must not have ever been flown, or fueled!
The tank is not positioned properly to allow  vents to work correctly. It might last 1/2 a tank if the pickup tube is at the bottom of the tank. Should rotate the NV and vents to the vertical position and the pickup tube to the 8 o’clock position.
Yes, I dare you to fly it. it will only “Fall Apart” upon a unplaned landing.
Yes, I would trust the old strings! You can replace them after the second crash.
Hey I don’t know its name, but it’s to square to be a Big Otto, very close to the Lil Satan, looks to be a quick, easy build with the diamond shaped airfoil. Very nicely finished and painted! The PO was a good builder. You got a great deal on a cool plane, for less than the cost of the engine!!
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Post  aspeed on Sat Oct 26, 2019 10:04 pm

Looks like a George that I had made from magazine plans.  I think it may have been from the 70s because I was in high school then. I made another similar one with a stabilator too with the same diamond airfoil and a TD .049. The motor has a newer cylinder than from that time. https://www.vintagemodelplans.com/collections/model-combat-airplanes-plans/products/full-size-printed-plan-building-notes-half-a-combat-george-wingspan-22-inch-engine-1-2a  It looks quite similar to the other one I made which name escapes me. Kind of remember a school shop teacher getting the kids to make them in a school in Peralta. Wherever that is.
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Post  NEW222 on Sun Oct 27, 2019 1:38 am

Unless the builder re-designed the horizontal stab, I do not think it is a 'George'. The 'George' has a one piece flying stab, whereas the OP's plane has a horizontal stab and elevator. Also, the wingtips on the unknown airplane are straight/squared, the 'George' has tapered wingtips.
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Post  aspeed on Sun Oct 27, 2019 9:19 am

I would have to dig through magazines for two days to find the article to get the name. The diamond airfoil was a great design feature with the leading edge at 45 degrees. It could be easily built on a board. I made it with a stabilator but likely took some artistic license.  Just can't remember the name.  It was 45 years ago.  I remember flying it all summer with over 45 degrees up and down, and doing squares and lots of eights and my own version of a clover leaf.  Then I had to rebuild the tail and gave it much less up and down.  It was so much faster on the turns that I could not do the same flying, so I sold it to a flying buddy.  He got a couple flights on it and destroyed it. Had a wedge tank. At any rate it will be a fun cheap date.
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Post  NEW222 on Sun Oct 27, 2019 10:10 am

I like the diamond airfoils. Easy to cut out ribs, as one can use a straightedge. I have only built one, the 1/2a Circlemaster I believe it is.
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Post  TLAnderson on Sun Oct 27, 2019 2:08 pm

Thanks for the replies. I took the engine off and rotated the tank so the vents are vertical. Also set the pickup tube to about 8:00. The engine mount is too narrow vertically to rotate the back plate to set the needle upright. The needle is more protected in the horizontal position anyway.

What are the groups thoughts on spraying the the plane with a coat of polyurethane to better protect the covering from oil soaking?

The pushrod seems to drag on the plastic ferrule where the rod exits the wing. This seems to limit the down travel on the elevator. Should I be concerned enough to do something about that?
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Post  aspeed on Sun Oct 27, 2019 2:14 pm

If you think there is a couple coats of dope or whatever, on it, I would not add any more weight. Trimming the plastic ferrule may be a good idea. I spent 3 hrs. looking through old magazines and found the one I made.  It really looks like this.  5 1/2" chord, 22 1/2" span, same elevator, the differences are minor which makes me think it is this one even still.  The wingtips have a shallow triangle and the motor mount is sideways to that.  The name is the "Snip" from Model Airplane News April 1974.  There were full size plans in the mag. for the "short kit"
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Post  TLAnderson on Sun Oct 27, 2019 5:06 pm

aspeed wrote:If you think there is a couple coats of dope or whatever, on it, I would not add any more weight. Trimming the plastic ferrule may be a good idea.  I spent 3 hrs. looking through old magazines and found the one I made.  It really looks like this.  5 1/2" chord, 22 1/2" span, same elevator, the differences are minor which makes me think it is this one even still.  The wingtips have a shallow triangle and the motor mount is sideways to that.  The name is the "Snip" from Model Airplane News April 1974.  There were full size plans in the mag. for the "short kit"

It does look alot like the Lil Snip, minus the wing tips and beam mount. Thanks. Thumbs Up

Unidentified 1/2A Combat Plane A10496771-203-1

Unidentified 1/2A Combat Plane Lil-sn10

Unidentified 1/2A Combat Plane Lil-sn11
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Post  ticomareado on Sun Oct 27, 2019 6:34 pm

The tank vents do need to be vertical however the NV can (and should) be left where it is. Then get best position for fuel P/U.
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Post  aspeed on Sun Oct 27, 2019 7:00 pm

In this copy there are two options for mounts.  i'll try and load it in the plan section too.  It is really easy to make if someone is interested, and maybe I can find it easier than on my computer.
Unidentified 1/2A Combat Plane 12_a_c10
Unidentified 1/2A Combat Plane 12a_pe10
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Post  TLAnderson on Sun Oct 27, 2019 7:32 pm

Mystery solved. Beer Cheers  Thanks. The plans should come in handy if (when) I crash it. Pumpkin
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