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  #11  
Old 05-24-2022, 11:03 PM
KenB's Avatar
KenB KenB is offline
 
Join Date: Sep 2018
Location: Longmont, CO
Posts: 30
Default

Quote:
Originally Posted by N804RV View Post
To reduce drag and help prevent water intrusion.

Perhaps. Still I'm not seeing how a hole on the underside (as opposed to the top) of the wings creates any perceptible drag. And water is more likely to drip down than drip up.

Cheers, Ken
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  #12  
Old 05-25-2022, 06:51 AM
fixnflyguy fixnflyguy is offline
 
Join Date: Jan 2006
Location: Winston-Salem, N.C.
Posts: 1,654
Default Get the Cleveland tool ones..

I have the slick ones from Cleveland tool also, and they are usually stashed in my on board gig bag that also has short loops of robust small gauge rope attached to them. That way, when you end up at an airport with big fat frayed ropes that don't fit through small rings, you can still tie off to the nice small rope loops. If you align these nice fittings with the large diameter holes in line with the airstream, the drag is nill anyway, and they can be left in all the time (Minus the mentioned loops), barely visible to most.
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  #13  
Old 05-25-2022, 10:47 AM
jcbarker jcbarker is offline
 
Join Date: May 2005
Posts: 225
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Hey everyone:

The idea was to have a decent looking tie down fitting that you wouldn't need to remove. Extra drag? Yes. Measurable? Don't think so.
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Oceanside, OR
-8 Built 2010 Sold 2016
-14a QB ordered Aug 2021
-picked up emp kit May 2022
-Fuse complete 12/20/22
-Attaching emp fairings 12/26/22
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  #14  
Old 05-25-2022, 11:20 AM
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Bill Boyd Bill Boyd is offline
 
Join Date: Sep 2006
Location: Landing field "12VA"
Posts: 1,965
Default Will they double as jack points?

Something to consider.

I have the tall HF bottle jack thingie with a scooped-out ram end, and use acorn nuts on threaded shafts as jack points - these look like they might do double-duty.

I just used my jack last week to perform a pre-paint job W&B, and if paint goes on as hoped this weekend, will be able to answer the age-old question about how much a paint job adds to the empty weight of an RV-10 and how it shifts the empty CG.
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  #15  
Old 05-25-2022, 12:29 PM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 2,010
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Note too that on every RV I've seen, that there is about a 1/8" gap between the bottom skin and the threaded tiedown bracket that's bolted to the spar. If you tighten the tiedown ring under the wing too much, you end up with a large ugly dimple in the skin.
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  #16  
Old 05-25-2022, 12:33 PM
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RV8JD RV8JD is offline
 
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Quote:
Originally Posted by jcbarker View Post
Hey everyone:

The idea was to have a decent looking tie down fitting that you wouldn't need to remove. Extra drag? Yes. Measurable? Don't think so.
Should have said so in your first post.

Anyway, here is a fairing set designed to be used with the Cleaveland tie down rings I linked in my Post #4. Easy on and off.

https://www.rvplasticparts.com/produ...wn-fairing-set


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Last edited by RV8JD : 05-25-2022 at 12:35 PM.
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  #17  
Old 05-25-2022, 03:11 PM
jcbarker jcbarker is offline
 
Join Date: May 2005
Posts: 225
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Nicely done Carl!
Do you know what the diameter of the large hole is in the stainless fitting?
Also: Cleaveland says they are out of stock.
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-8 Built 2010 Sold 2016
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-Fuse complete 12/20/22
-Attaching emp fairings 12/26/22
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  #18  
Old 05-25-2022, 03:55 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
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I'm always bemused when people spend time and money and often add weight redesigning something that works nicely as-is.

The Cleaveland tie down ring is fine if you use a carabiner with it. With rope, the sharp edge will considerably weaken the rope under load. Rope is sensitive to stress concentrations just like aluminum is.

Dave
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  #19  
Old 05-25-2022, 05:31 PM
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Roadjunkie1 Roadjunkie1 is online now
 
Join Date: Jun 2017
Location: Erie, Colorado
Posts: 413
Default Tiedown ring drag; hole drag; Whaaaaaaat??

Quote:
Originally Posted by David Paule View Post
I'm always bemused when people spend time and money and often add weight redesigning something that works nicely as-is.

The Cleaveland tie down ring is fine if you use a carabiner with it. With rope, the sharp edge will considerably weaken the rope under load. Rope is sensitive to stress concentrations just like aluminum is.

Dave
Agreed and agreed. My (stock Van's) tie down rings are in my tool bag along with my control locks (VERY small and simple) and chocks. It takes me probably 10 seconds each to screw the rings in. I would imagine an unfilled hole causes some drag but would likely be measured in picograms of resistance.
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  #20  
Old 05-26-2022, 08:18 AM
Scott Hersha Scott Hersha is offline
 
Join Date: Jan 2005
Location: Cincinnati, OH
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Quote:
Originally Posted by KenB View Post
I know this probably sounds super ignorant on my part. But what is the reason for covering up or filling the holes when the tie down rings are removed?
Mud daubers love it up in there - so go ahead and leave it open. Give a bug(s) a home.
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RV6/2001 built 2000/sold 2005
RV8 Fastback/2008 built/sold 2015
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