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General control line discussion => Open Forum => Topic started by: Brian Massey on November 19, 2014, 03:10:39 PM
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I'm starting a new Trophy Trainer and the plans call for 3/4 inch offset for the wing. Would making the wing symmetrical void it being classic legal? And how would the change effect performance?
Thanks,
Brian
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In my opinion, whatever the rules say it wouldn't be in the spirit of classic stunt. OT says you can't make any changes that impact the aerodynamics; I suspect that the classic rules say the same.
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Why would you want to change it? The original layout flies great as-is. Tom Warden knew what he was doing.
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Why would you want to change it? The original layout flies great as-is. Tom Warden knew what he was doing.
Yes, it does fly great. But most stunters now seem to have done away with the asymmetrical wing. I've heard pros and cons both ways, so I'm just thinking of trying it. An no, I would not try to defeat the spirit of Classic Legal. If I do build it that way, I would let everyone know and not try to fudge.
Brian
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I agree completely with Mike K. about this change...It's totally unnecessary to make the wings symmetrical. That said I seriously doubt if anyone would care a whit if you were to do it.
Areodynamically I would personally not make the wings symmetrical but might consider making the outboard wing just a bit longer so that the total assymetry was about 5/8 inch. That would make it closer to the actual speed differential between the two wings. Again it really isn't necessary to do that, I've seen several of these things fly at VSC and they seem to fly very well as designed!
The rules for changing things are a little bit more specific for OT than Classic. At least that's very true for VSC and most other contests I've attended. No one takes a ruler to anything. If you were to do something really obvious like moving the landing gear from the wing to the fuselage or something obvious ...like extending the rear of the fuselage by 5 inches someone would probably notice but I doubt that a 1/2 inch more or less of wing span would ever be noticed...or that anyone would care!
Randy Cuberly
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I agree completely with Mike K. about this change...It's totally unnecessary to make the wings symmetrical. That said I seriously doubt if anyone would care a whit if you were to do it.
Areodynamically I would personally not make the wings symmetrical but might consider making the outboard wing just a bit longer so that the total assymetry was about 5/8 inch. That would make it closer to the actual speed differential between the two wings. Again it really isn't necessary to do that, I've seen several of these things fly at VSC and they seem to fly very well as designed!
The rules for changing things are a little bit more specific for OT than Classic. At least that's very true for VSC and most other contests I've attended. No one takes a ruler to anything. If you were to do something really obvious like moving the landing gear from the wing to the fuselage or something obvious ...like extending the rear of the fuselage by 5 inches someone would probably notice but I doubt that a 1/2 inch more or less of wing span would ever be noticed...or that anyone would care!
Randy Cuberly
Randy,
The outboard wing LONGER? I'd make the inboard wing longer...
Bill
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...Than it is... Not than the inboard.
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I'm pretty sure he meant to type INboard.
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...Than it is... Not than the inboard.
Thank you John. I guess I wasn't very specific about that but that is exactly what I meant. In other words it is making the outboard wing 1/8 inch longer than the plans show it to be for a total assymetry of 5/8 inch with the longest wing being the inboard.
Bill may have just been poking me...He's like that and a long time good friend!
Randy Cuberly
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Thank you John. I guess I wasn't very specific about that but that is exactly what I meant. In other words it is making the outboard wing 1/8 inch longer than the plans show it to be for a total assymetry of 5/8 inch with the longest wing being the inboard.
Bill may have just been poking me...He's like that and a long time good friend!
Randy Cuberly
Hey, you don't often give me a shot like that Randy...gotta take advantage while I can! See you at VSC if not sooner (like the SW Regionals.)
Bill
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Hey, you don't often give me a shot like that Randy...gotta take advantage while I can! See you at VSC if not sooner (like the SW Regionals.)
Bill
Yeah, make the Regionals and drag some of those other guys there with you!!
Randy C.
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Unlike OTS, there's nothing in the Classic rules that gives the CD authority to DQ a model for modifications of any kind. Changing from wing gear to fuselage gear is common enough, I doubt anybody would get too excited about it. Since nobody uses the "Authenticity" (is that the right word?) Points, any transgressions usually show up in a reduction of Appearance Points, if the AP judges are on their toes. y1 Steve
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I'm starting a new Trophy Trainer and the plans call for 3/4 inch offset for the wing. Would making the wing symmetrical void it being classic legal? And how would the change effect performance?
I wouldn't deduct any Fidelity Points for that. But 3/4" is about right, I wouldn't change that for performance reasons.
Brett
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Hey, you don't often give me a shot like that Randy...gotta take advantage while I can! See you at VSC if not sooner (like the SW Regionals.)
Everybody ought to go to the SWR, it has always been a great contest and at least every time so far, the weather has been very good.
Brett
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I wouldn't deduct any Fidelity Points for that. But 3/4" is about right, I wouldn't change that for performance reasons.
Brett
Thanks, that's what I wanted to know. I'll build per the plans; the new plans that is. I have a set of Tom's original plans he gave me many years ago, and there are many changes, mostly more modern building techniques etc.
Brian