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Author Topic: flaps inboard vs outboard  (Read 884 times)

Offline Ty Marcucci

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flaps inboard vs outboard
« 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
Ty Marcucci


Offline Andrew Hathaway

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Re: flaps inboard vs outboard
« Reply #1 on: January 26, 2008, 05:04:00 PM »
Isn't that how the early Veco Chief was configured? 

Offline EddyR

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Re: flaps inboard vs outboard
« Reply #2 on: January 26, 2008, 05:33:37 PM »
My plans for the 52 Nobler that was in the magazine are like that also
Ed
South of Cocord NC -25 miles from the Huntersville field

Offline Andrew Hathaway

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Re: flaps inboard vs outboard
« Reply #3 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.


Online Brett Buck

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Re: flaps inboard vs outboard
« Reply #4 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

Offline Jim Pollock

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Re: flaps inboard vs outboard
« Reply #5 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   H^^

Offline Bill Little

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Re: flaps inboard vs outboard
« Reply #6 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   H^^

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??? S?P LL~ LL~ LL~  H^^
Big Bear <><

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Trying to get by

Online Eric Viglione

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Re: flaps inboard vs outboard
« Reply #7 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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Offline Terry Bolin

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Re: flaps inboard vs outboard
« Reply #8 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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