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Building Tips and technical articles. => Building techniques => Topic started by: Tim Wescott on August 29, 2012, 03:08:02 PM
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So, Randy Powell gives me this nice Sig Banshee that his kid built. I look at it, figure I'm not going to change a thing on it -- just slap on an engine, and tank, and go.
@#$%. Turns out it's covered in tissue, and my shop just isn't tissue friendly. Or maybe I'm ham-handed. At any rate I managed to punch two holes in it before it dawned on me that I either need to seriously revamp my airplane holding fixtures in the shop, or I need to recover the wing. So it's getting Monocoat,
While I have the wing stripped I may as well put in adjustable leadouts (and a weight box -- but that's boring). Since I had to adapt the existing leadouts, what I did was a bit oddball -- but I think it'll work out well. Here's the core working parts -- as you can see, there'll be a slot for the leadouts, and another one for adjustment. It won't be as snazzy as the usual arrangement -- but I think it'll work well, without having taken a lot of my effort or time to make.
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Tim,
Somehow, I know you wouldn't just fly it. It was covered in silkspan, but it was very old silkspan at this point and pretty fragile. You could cut the pushrod and add flaps, too as long as you're at it. It was built without flaps because I envisioned that he may get splatted a lot and it would be easier to rebuild without flaps, but we know that won't happen with you. Same reason the fuse is so heavy and reinforced.
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It sure looks too thin and dense to be anything but tissue -- but I'll take your word for it.
I thought about cutting it up and putting on flaps, but decided that'd be too much work. But then, that was before I decided to strip the wing.
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That's very clever, Tim! y1
Bob Hunt
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I agree with Bob, in fact, I may adapt that design to my current build I like it so well.
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Here it is with all the surrounding stuff for covering to stick to. It just needs carving, now.
If I'd been smart I would have made the two rails that define the access to the screw by pasting two bits of 3/16 (or maybe 1/8) material together with 3/16" spacers.
But I'm stupid, so I put the rails in first, then thought about how I wanted the covering to look, cursed, and fit some pieces in. Fortunately the opening opens up toward the outside, instead of the reverse.
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And ready to cover. I really love chisels for doing this sort of carving: you can reach into places that x-Acto knives won't go, and if you're careful you can put a Really Sharp edge on 'em.
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Here is the tip that I designed for the Goldberg Shoestring. You could have simply cut the tip piece to allow for the leadouts and fitted 1/16" ply both sides.
I think the original idea came from Tom Morris years ago.
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I would have done something like that for new construction. But the plane came to me with perfectly good leadouts, just fixed in place. What you see here was done with the tubes already on the leadouts, without disturbing the existing controls beyond making them adjustable.
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The only shortcoming that I can see is the need for two slots, one for the adjuster and one for the lead-outs themselves, whereas the conventional ones share the same slot for both functions.
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With another 100 engineering hours and 20 more shop hours, Tim could have come up with a design that would have only one slot. I'm sure this'll work just fine. S?P Steve
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Tim,, well thought out,, and clean solution to a problem,, I likeit,, now cover it up quick before you get carried away on some other thing,, LOL,,
are you going to salem?
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now cover it up quick before you get carried away on some other thing,, LOL,,
I'm trying to get carried away with a Fancherized Twister, but I keep distracting myself.
are you going to salem?
Almost maybe 100% certainly, if my work schedule cooperates. I have a couple of trips coming up, the dates for which have not been set, that may screw me up.
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The leadout system is clever.
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I did something similar, but different, on my Wombat biplane. The leadout guide sticks up out of the lower wing. I will have to look at it again, as I don't remember exactly what I did. It has separate adjustments for up and down and back and forth. I'll go look at it again and maybe post a picture.
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simple answer
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Tim, great idea! I am trying to figure , do you now need a slot at the wingtip for the leadouts to slide and a slot on top of the wingtip to get to the adjuster?
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Tim, great idea! I am trying to figure , do you now need a slot at the wingtip for the leadouts to slide and a slot on top of the wingtip to get to the adjuster?
Yes, you need two slots -- that's the downside. I put the adjustment slot on the bottom side of the wing -- all the pictures are of the thing sitting upside down in a cradle.
The reason I did it this way is that it's easier to retrofit onto an existing wing.
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.25" hole is all you need here.
Retro fit to a 50 year old wing. I try not to throw anything out.
Added rib on the foolish wingtips gives me 3.5" of added lifting area with an honest airfoil.
Lightening holes.
Cute balsa plug goes in adjusting hole while flying. Keeps out dirt and air. ;D
Last photo is like 50 years ago.
Charles
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Looks like a lot of parts to me... ::)
W.
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So Tim, how's the world's most labor intensive ready to fly Banshee doing?
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So Tim, how's the world's most labor intensive ready to fly Banshee doing?
Shelved for the moment, in favor of the world's most labor intensive kit-built Twister. It was to be a quickie before I started the Twisted Sister, but I got stalled out when my Monocoat turned out to be bad. So to keep my bench busy, I started the Twister, and that's now occupying the spot.
I shoulda just put tape on it and flown it...
At some point I'll come to a stop on the Twister and make progress on the Banshee again. If nothing else, I want to use it as a test bed for the Twister tank -- I want to use a metal one so I can paint it, but only if it works guud.
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Shelved for the moment, in favor of the world's most labor intensive kit-built Twister. It was to be a quickie before I started the Twisted Sister, but I got stalled out when my Monocoat turned out to be bad. So to keep my bench busy, I started the Twister, and that's now occupying the spot.
I shoulda just put tape on it and flown it...
At some point I'll come to a stop on the Twister and make progress on the Banshee again. If nothing else, I want to use it as a test bed for the Twister tank -- I want to use a metal one so I can paint it, but only if it works guud.
Randy & Tim,
Harumph, harumph...!
The "most-labor-intensive..." line is original with me, as is "Pukey Profile" and some others. I must insist that full credit be given in all cases. Stiff fines, severe ridicule and strongly worded letters might otherwise come into play.
As to the original topic in this thread do keep my name away from such an assemblage of parts. Please.
Dan
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C'mon. Imitation is the sincerest form of flattery.
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Come to think of it, while "Pukey Profile" belongs to you without question, I suspect that the "most labor intensive" tag is obvious enough to have been in use somewhere before you were driving.
But if you want, I'll claim the Twister project as "most overwrought" instead. With over 25 separate pieces of wood in a fuselage that came with 5 in kit form, it counts as overwrought, yes?
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Dan is just being prissy. But ignore him and he'll only get worse. ;D (smiley face just for Dan)
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Dan is just being prissy. But ignore him and he'll only get worse. ;D (smiley face just for Dan)
Sigh. My comments were a joke! I am thinking it would be a lot easier all the way 'round if youse guys would elevate your appreciation of humor, 'cos there is no way I will reduce myself to using those faggoty smiley things!
As to who got there first my application of phrase in question was to an ARF Flite Streak. And so TWMLARFFS (The World's Most Labor-intensive ARF Flite Streak) was, again, nothing more than a silly joke. (See a pattern here?)
Not only did the model exist for a time the name was exceedingly accurate. While there might be one or two ARF Flite Streak hop-up tips not incorporated into that model I cannot think of one at the moment. And there were mods made which I have not seen from anyone else.
All in all a really stupid project even if the model flew well.
Dan
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DAn,
Lighten up, Man. Oh wait, you already did. Your naming conventions are famous!
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Hey ease up on Dan. People are just going to have to learn he is who he is and will always be I hope.
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DAn,
Lighten up, Man. Oh wait, you already did. Your naming conventions are famous!
Yeah, and I didn't even mention my model which Wild Bill designed and called the Bare Cat. While it would be nice to post a picture of it, if I were to do so one and all would agree that Phlying Fallic Cymbal is an exceedingly appropriate name, clearly better than Bill's.
Dan
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Ya just had to go there.