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Author Topic: flaps inboard vs outboard  (Read 711 times)
Ty Marcucci
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« on: January 26, 2008, 04:40:15 PM »

Queston?  What would happen if the inboard flap was 1/4 inch wider than the outboard flap as well as about one inch longer???  n1  I have a good reason for asking this, it may be the answer to a consistant problem.  y1
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Andrew Hathaway
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« Reply #1 on: January 26, 2008, 05:04:00 PM »

Isn't that how the early Veco Chief was configured? 
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Ty Marcucci
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« Reply #2 on: January 26, 2008, 05:10:46 PM »

Are you looking over my shoulder? Layingdown Yep, I just noticed it or it finally leaped out and bit me tonight. I was cleaning it up and kept wondering why it flew so strange. Then I noticed the flaps. I don't remember questioning the set up when I built it, but now it just looks so wrong.   n1
« Last Edit: March 19, 2017, 04:36:37 PM by Ty Marcucci » Logged

Ty Marcucci
EddyR
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« Reply #3 on: January 26, 2008, 05:33:37 PM »

My plans for the 52 Nobler that was in the magazine are like that also
Ed
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South of Cocord NC -25 miles from the Huntersville field
Andrew Hathaway
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« Reply #4 on: January 26, 2008, 05:35:50 PM »

I've got one that was built from an original kit and stuffed in someones attic years ago.  It ended up on ebay where I bought it for the Fox 35 in the nose.  When I rebuilt it I figured the differential flaps were a bad idea.  If I had to guess I would imagine the idea for the mismatched flaps is the same idea behind the differential flaps on the Veco Thunderbird.  Both look like built in trim problems to me, but then maybe I'm missing out.

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Brett Buck
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« Reply #5 on: January 26, 2008, 10:13:14 PM »

Queston?  What would happen if the inboard flap was 1/4 inch wider than the outboard flap as well as about one inch longer???  n1  I have a good reason for asking this, it may be the answer to a consistant problem.  y1

   Something bad - specifically a tendency to wildly roll away from you on every corner.

    Brett
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Jim Pollock
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« Reply #6 on: January 27, 2008, 08:30:44 AM »

Ty,

Reversing the flaps and adding more tip weight would probably come pretty close to fixing the wild rolling to the outside on corners.  That was a way to increase line tension back in the 50's and was taken to the max by Bob
when he introduced the differential flaps on the Thunderbird II.

Jim Pollock   Hoff
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Bill Little
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« Reply #7 on: February 01, 2008, 03:35:59 PM »

Ty,

Reversing the flaps and adding more tip weight would probably come pretty close to fixing the wild rolling to the outside on corners.  That was a way to increase line tension back in the 50's and was taken to the max by Bob
when he introduced the differential flaps on the Thunderbird II.

Jim Pollock   Hoff

And I'm sure many of remember that Tom Dixon had the differential flaps REVERSED on his last T-Bird.  He flw that one real nice!

Does anyone sometime get the feeling we often deal with something akin to paralysis by analysis when we deal with our airplanes??? Stir the pot Layingdown Layingdown Layingdown  Hoff
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Eric Viglione
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« Reply #8 on: February 02, 2008, 01:26:23 PM »

I remembered the old Palmer article, and dug it out of good ol' Dec 1959 for you. I'll post pics below; I hope are easy to see on your screens. He admits a potential negative effect in theory at the end of the article, yet states he does not experience it at normal stunt speeds...Also mentions neg effects of the larger flap that motivated the experiment. It's an interesting read for 1959! Hey Tye, if nothing else, this also shows an inverted engine Tbird in a 1959 article for that other post of yours in the Classic forum.
EricV
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Terry Bolin
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« Reply #9 on: February 03, 2008, 07:37:29 AM »

Very good information! Thanks for the articles. Kind of funny this came up, I was visiting with Allen Brickhaus just yesterday about this very subject. ( I am building a Chief and noticed the difference in flaps). Allen also explained that the inside wing flys slower speed so a flap differential helps to balance that speed difference. I also found this present in some modern stunt ships I have waiting to be built. I'm not a designer so it's good to be able to find out why things are not mirrored. Helps me to under stand trimming problems.
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Ty Marcucci
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« Reply #10 on: March 19, 2017, 04:37:40 PM »

My plans for the 52 Nobler that was in the magazine are like that also
Ed

Yep, and it was just a modified Chief according to GMA..
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Ty Marcucci

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