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General control line discussion => Open Forum => Topic started by: Wynn Robins on March 29, 2012, 05:25:53 PM
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OK - I just found a free flight plan for the XP-67 Moonbat - an I want to turn it into a stunt plane - looks too cool not to try at least..... anyone want to help?
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You're a scary person, Wynn. Very scary. LL~
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Are you thinking electric or IC? From the top view the thing reminds me of my beloved F9F with twin recips! Should be able to accomplish LOTS of lift throughout the nacelles and fillets. Go for it!!
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Help how? With encouragement? Go Wynn!
With advise? In my humble opinion, you're going to have to make some serious compromises to reconcile flaps and that wing planform. I'd be seriously tempted to keep the planform, and make the thing flapless. Otherwise, increase the wing chord and span and shorten the nacelles to no longer than the end of the flaps. Even then you'll have swept-forward flaps which I have no experience with, but which I've seen comments indicating that they're not all that cool in the wind.
Oh -- and thicken the airfoil, of course. At least it's got a honkin' big tail already.
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Well Brother Wynn, you have bit off quite a project there. I agree with Tim, I don't have a clue as to how I would go about handling flaps. Lots of area to stabilize turning and having the plane stop turning, a very wide fuselage section from plan view. Not exactly sure how that would work.
But, otherwise, I would love to see you tackle it and cure the potential problems! Electric or IC would both work as far as that goes, but with those nacelles you would have a lot of area to hide batteries, etc..
BIG Bear
RNMM/AMM
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Wynn,
Do you have plans or just that view?
Charles
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Id be taking a proven twin design like windys twin, and making the appropriate asthetic chages to make it into this beast.
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Id be taking a proven twin design like windys twin, and making the appropriate asthetic chages to make it into this beast.
Windy's F7F would be a starting point, I guess. But how to get those plans, I don't have a clue.
BIG Bear
RNMM/AMM
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Its really only the asthetics that need changing, thats the key to any multiengine stunt project. - make it look like but design it like..
Bob Hunts Twin Im sure he has plans for.
There are plenty of good performing Twins out there : Gordon Delaney has a great one.. errr.. two, I mean one.
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Did someone say F7F?
I would have interest in a F7F. n~
Charles
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it will be electric for sure - yes I have a free flight plan - as mentioned-
I would love to get my hands on Windys plans - but like Bill said.... HOW??
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Wynn: Back in the 1950's in WAM a guy name Jack Barlow flew a XP-67 in scale it was a winner and had 2 K&B 29's I started one but never finish , instead I built a F7F for C/L Scale I think with todays power plants I would go Electric this would keep the smooth lines of the wings and necceles ... #^ #^ #^
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Electric?
I don't know about that.
You may think so, but you don't have a great deal of lifting wing area.
Charles
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Don't need no stinking flaps. Save a lot of trouble.
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I've considered this one before and agree that it would make a super cool model. It would be a LOT of work to figure out and design though.
Personally, I don't feel like any "standard" twin engine aircraft planforms are close enough to this design to offer a viable starting point. If I were to attack this one, I think I would imagine a top view of one of the flying "Stop Sign" or "Saucer" C/L models seen over the years (because they are simply a flying airfoil) and then "pull" and "stretch" that shape here and there like Silly Putty to get yourself in the ballpark with the overall shape. I would shoot for exact scale outlines while increasing the "wing" and stab/elevator outlines a bit. The model would then be built unlike any "normal" airplane, you would want to build as much of the overall structure as possible using airfoiled rib shapes front to rear. In a sense, think of building the earlier mentioned "Stop Sign" with small wings added to increase the span along with adding other necessary details. Lot's of work and head-scratching, but done right it would be very cool. y1
...and even cooler yet if it was nitro. VD~ ;D
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Make it electric, contra rotating motors, and use if for "Electric Speed" 8)
G