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Speed,Combat,Scale,Racing => Rat Racing and Team Racing => Topic started by: Bill Heher on February 10, 2011, 11:31:29 PM
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Well I made a dumb move on the Super Fly the other night. Sleep deprived from too much work, and trying to make some progress on the fusealage- I accidently swapped the nose doublers - one with engine cut-out ended up on the IB side. This results in my having to invert the fuse to get the engine on the OB side. Thankfully the wing is symetrical so it still fits the cut out with the Leadouts coming out the correct end!
I had already glued the basswood top and bottom caps on the fuse- with the top one stopping at the stab leading edge. I had used the stab mount area as my reference line when laying out the wing cutout, so I kind of need to mount the stab there to keep the incidence between wing / stab correct.
Soooo- what problems might I encounter if I mount the stab on the bottom of the fuse, and put some plywood tip plate / sub rudders on the ends of the stab with imbedded wire to act as the tail skids.
I can beef up the stab / elevator with glass / epoxy and add some triangle stock at the mount to increase strength. Checking CG of bare airframe w/o tank, gear, finish shows it is nose heavy, so the extra weight of beefing up stab should pose no issue.
I think structurally it will be OK, but dont know how it might affect the flying qualities.
All thoughts, ideas, theories, conjecture, jabs, jibes and comments are appreciated.
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couple more pics
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Hi Bill,
I would cut out the doubler to fit the engine and then I would make a 1/8 aluminum plate on the inboard side to cover the booboo. It will also make the engine mount stronger at the same time.
Al
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It wouldn't even need to be aluminum. An 1/8" ply plate would be at least as strong as stock, and maybe a little easier to deal with.
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Hey Bill, No need to have your world, or the fuselage turned upside down, we've all done this before!
Just cut out the outboard doubler so that the engine will fit, and add a full depth cheek cowl on the inboard side to firm up the front end as per the plans. make sure the cheek cowl covers 25% of the wing chord. This will strengthen the wing joint as well.
Cheers, Les
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Do as Les says. But if you are just flying for sport the way you have your stab/elevator may work for a while. Other wise it may be getting knocked off every time the pilot lands and/or when the pit man catches it. H^^
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Talk about a Dooohh! moment; sometimes the obvious escapes me. Make a cutout on the correct side. Sheees- I can hardly believe I had to be told that.
Thanks for the reality check guys- sometimes I can't see the tree 'cause I'm worried about getting lost in the forest.
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Cutting a splice say 2 in long over the spar and flipping the back half over'd do it .
just a cut at an angle , same Ea side . So youve a front and a back fuselage untill
there fitted. Glue on both faces to get total adheshion .Keep a window open ! ? mw~
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Talk about a Dooohh! moment; sometimes the obvious escapes me. Make a cutout on the correct side. Sheees- I can hardly believe I had to be told that.
Thanks for the reality check guys- sometimes I can't see the tree 'cause I'm worried about getting lost in the forest.
We,ve all done that at one time or another. Wait til you put the controls in the wrong wing. Never let my brother forget that one. H^^
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Doc- if i ever put the controls in the wrong wing i will finish the plane and give it to Leo Mehl -he flies the wrong way around!