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chris_sinfield(at)yahoo.c
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 Posted: Mon Jan 16, 2006 3:46 pm Post subject: has anyone dimpled their XL? |
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Hi All
Has anyone dimpled their XL kit?? IS it worth it and would you get any extra speed out of it due to the clean flying surfaces..
Eddie Steve has stated to dimple his tail and is about to start the wings.. It looks Good without the raised heads but he said it takes twice as long.. So the Q is ... Is it worth it just for the looks? or is there better performance...?? would it make a difference to the flying? test flight ?
I was thinking of doing the wings and tail with dimpled rivets and the fuse normally..
Chris..
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Larry McFarland
Joined: 10 Jan 2006
Posts: 36
Location: East Moline, Illinois
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| Posted: Mon Jan 16, 2006 4:22 pm Post subject: has anyone dimpled their XL? |
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Chris,
You might just see another 2 mph airspeed, but I doubt it's worth the
work you propose to get it.
Larry McFarland
do not archive
Chris sinfield wrote:
| Quote: |
Hi All
Has anyone dimpled their XL kit?? IS it worth it and would you get any extra speed out of it due to the clean flying surfaces..
|
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Larry McFarland - 601HDS - Stratus |
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zodierocket(at)hsfx.ca
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| Posted: Mon Jan 16, 2006 4:23 pm Post subject: has anyone dimpled their XL? |
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The effect of flat riveting over domed heads is 1/4 mph gain on speeds
below 200mph. IS the time worth it on an XL ? I doubt it, but if you
want to do it for looks then knock yourself out.
Mark Townsend Alma, Ontario
Zodiac 601XL C-GOXL, CH701 just started
www.ch601.org / www.ch701.com / www.Osprey2.com
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Gig Giacona
Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA
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| Posted: Tue Jan 17, 2006 8:14 am Post subject: Re: has anyone dimpled their XL? |
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Doesn't some of the strength come from the domed shape of the rivet?
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W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR |
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daveaustin2(at)sprint.ca
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| Posted: Tue Jan 17, 2006 8:31 am Post subject: has anyone dimpled their XL? |
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As a test to speed production of Spitfires in WW2 they stuck split peas over
every rivet on the plane. Lost about 4 mph at 400 mph. That was too much
to give an Me 109.
Dave Austin 601HDS - 912, Spitfire Mk VIII
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jhstarn(at)verizon.net
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| Posted: Tue Jan 17, 2006 9:50 am Post subject: has anyone dimpled their XL? |
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So that's why Spitfires are green, Boy the things ya learn from the list.
8*) KABONG
Do Not Archive
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d.goddard(at)ns.sympatico
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| Posted: Tue Jan 17, 2006 1:29 pm Post subject: has anyone dimpled their XL? |
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mijniljj(at)yahoo.com
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| Posted: Tue Jan 17, 2006 2:19 pm Post subject: has anyone dimpled their XL? |
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It doesn't have a laminar flow airfoil either so i
don't think it would make a dimes worth of difference,
may lower the landing speed because of the vortices.
jim
--- "Dave G." <d.goddard(at)ns.sympatico.ca> wrote:
[quote]
<d.goddard(at)ns.sympatico.ca>
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jhstarn(at)verizon.net
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| Posted: Tue Jan 17, 2006 3:24 pm Post subject: has anyone dimpled their XL? |
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Saw a TV program the other night on Spitfires. Top speed was not the pilots
main concern. Turning and stall speed in a vertical climb was the name of
the game. They had two "Aces" on. An ME 109 & Spitfire were involved, 109
behind & both turning. 109 was gaining the advantage so the Spitfire pilot
pulled straight up in a vertical climb, the 109 followed & rolled to watch
the Spitfire. They were at about the same level looking at each other. The
first one to stall & fall off would have the other on its tail. It would
seem that the smoother the wing, the less air separation & lower stall.
Flush vs round head ? ?. The 109 stalled first, Spitfire did a modified
"hammerhead" & shot down the 109. KABONG Do No Archive
Subject: Re: RE: has anyone dimpled their XL?
[quote]
It doesn't have a laminar flow airfoil either so i
don't think it would make a dimes worth of difference,
may lower the landing speed because of the vortices.
jim
--- "Dave G." <d.goddard(at)ns.sympatico.ca> wrote:
>
> <d.goddard(at)ns.sympatico.ca>
> ---
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