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lusc10(at)sbcglobal.net
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 Posted: Wed Feb 18, 2009 8:33 pm Post subject: new guy questions |
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Has anybody built a CH 601 or 650 out of 2024 t3? Also has anybody dimpled skins to get a flush outside skin. I hear that the sonex has a dimpled skin option. Thank you for time.
Randy
PS anybody have clecos? Looks like I will need a lot.
[quote][b]
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larry(at)macsmachine.com
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| Posted: Thu Feb 19, 2009 6:16 am Post subject: new guy questions |
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Randy,
2024-T3 will corrode at a much higher rate and not offer much more
strength for the 601. Dimpling the skins has been done, but the thin
original wing skins would look very
rippled after having the skins dimpled. As example, a 601 modified in
Mexico had this and ended up with a lot of body filler on all the rivet
rows and elsewhere.
6061 is an ideal material that will serve better, make the job easier
and won't cost so much to build. Dimpling won't make the 601 measurably
faster either.
Larry McFarland 601HDS at www.macsmachine.com
Randall Tait wrote:
| Quote: | Has anybody built a CH 601 or 650 out of 2024 t3? Also has anybody
dimpled skins to get a flush outside skin. I hear that the sonex has
a dimpled skin option. Thank you for time.
Randy
PS anybody have clecos? Looks like I will need a lot.
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mcjon77
Joined: 17 May 2008
Posts: 55
Location: Chicago
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| Posted: Thu Feb 19, 2009 11:09 am Post subject: Re: new guy questions |
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The "dimpled skin option" for the Sonex is merely using all flush rivets for the entire fuselage and wing rather than just the leading edge. There is debate as to whether it adds any significant speed increase at all. I haven't heard anyone say that it would add more than 1 or 2 mph to the cruise. One person even suggested that without filling the flush rivets there might not be any speed increase, because you are simply exchanging a small hill for a small crater.
The Sonex folks that do use flush riveting do it mostly for looks. A Polished, flush riveted Sonex tends to look better in photos, although up close and in person, IMHO, it is a toss up. I haven't decided whether or not to fllush rivet my entire airplane. I am going to look at a few more examples of a flush riveted Sonex before I decide.
Get a hold of "speed with economy" by Kent Paser. He details numerous speed mods he did to his Mustang II and documented the results. There are a lot of other speed mods that can be done. However, be very wary about making your plane TOO fast and exceeding VNE and increasing the potential for a structural failure. Hope this helps.
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Jon McDonald
Building Sonex #1287
Next up CH 701  |
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eddies
Joined: 20 Jun 2006
Posts: 40
Location: Australia
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| Posted: Thu Feb 19, 2009 12:12 pm Post subject: Re: new guy questions |
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I dimpled my wings and airframe in the 601XL except for the major structural areas such as the longerons in the fuselage. The finished result is very good, no distortion of the skins etc.
As far as speed increase goes there is no benefit that I can tell.
You can have a look at the various photo's here;
http://www.mykitlog.com/eddieseve
Keep in mind that doing this results in lots of extra work and an extended build time.
Cheers
Eddie
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leinad
Joined: 19 Sep 2006
Posts: 283
Location: Central Virginia
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| Posted: Thu Feb 19, 2009 4:52 pm Post subject: Re: new guy questions |
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Randy,
I've dimpled my skins. I didn't really like the idea of the Zenith flush rivets pulled into a raised head, though I'm sure they are fine. I have to disagree with the idea that dimpling somehow distorts the skin. I haven't had that problem at all. I did the majority of the dimpling with a home made riveting tool. I'm plans building, so once I've done all the work of laying out, cutting, drilling and deburring the part, the little bit of extra time dimpling is no big deal. I didn't really do mine for any performance gain as I believe that would be negligible. I did it for looks. I like the idea of washing a smooth surface.
You're right about the clecos, there's no such thing as too many. To see the hand made riveting tool check out my website at http://daniel.dempseyfamily.us/zodiac/index.html
Dan
| Quote: | "lusc10(at)sbcglobal.net"]Has anybody built a CH 601 or 650 out of 2024 t3? Also has anybody dimpled skins to get a flush outside skin. I hear that the sonex has a dimpled skin option. Thank you for time.
Randy
PS anybody have clecos? Looks like I will need a lot.
|
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| This picture shows some of the flush rivets. |
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_________________
Scratch building XL with Corvair Engine |
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Afterfxllc(at)aol.com
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| Posted: Thu Feb 19, 2009 8:11 pm Post subject: new guy questions |
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2024 t3 is what Van's uses and I had asked Zenith at one time if I could use that instead of 6061 and they said it would be fine for the skins.
Jeff
"lusc10(at)sbcglobal.net"]Has anybody built a CH 601 or 650 out of 2024 t3? Also has anybody dimpled skins to get a flush outside skin. I hear that the sonex has a dimpled skin option. Thank you for time.
A Good Credit Score is 7001267884/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID%3D62%26bcd%3DfebemailfooterNO62"> See yours in just 2 easy steps!
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