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  #11  
Old 06-30-2021, 01:29 AM
ppakotze ppakotze is offline
 
Join Date: May 2011
Location: Cape Town
Posts: 17
Default Cowl retaining pin alternative solution

Here is an alternative solution, we added this about 100hrs in on our RV7 as the cowl pins would also migrate during flight.
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  #12  
Old 06-30-2021, 10:33 AM
abwaldal@gmail.com abwaldal@gmail.com is offline
 
Join Date: Jan 2017
Location: Battle Ground WA
Posts: 299
Default My pins can't walk

My solution on a flying plane I bought. Reason for the pop rivets. Same as the one I built.
Easy fool proof and quick.
Art
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  #13  
Old 06-30-2021, 06:39 PM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 3,420
Default no separate retainer piece

- pins are hooked at the ends to interlock.
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Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 900+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com

Last edited by Steve Melton : 06-30-2021 at 06:46 PM.
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  #14  
Old 06-30-2021, 07:29 PM
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bullojm1 bullojm1 is offline
 
Join Date: Feb 2006
Location: Baltimore, MD
Posts: 1,047
Default

My take on a pin retainer (pin was trimmed after pic was taken). 800+ hours and no issues. Very low profile.

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  #15  
Old 07-04-2021, 05:14 AM
mbauer mbauer is offline
 
Join Date: Nov 2015
Location: Nikiski, AK
Posts: 460
Default Nite Ize Gear Ties

My cowl pins have finger loops on the end.

Recently I made a tool to pull and push them in place. Simplifies installing them. 10-seconds max each pin. Used to take longer, best part is my arm doesn't get stuck in the opening for the oil fill anymore when installing them.

The next issue was how to secure? Original answer took about an hour to hook both finger loops. It was a fishing lure snap wire assembly.

Took forever and a day in the small confined space to hook both finger loops. Couldn't see them; had to do everything by feel. Accidently only hook one, now add time to try and get the thing un-snapped, before trying to get both again.

A month ago I found a product called Nite Ize Gear Ties. The 6" version takes 30-seconds to secure these loops.

Bend into a hook shape, insert through both loops and twist a couple of wraps and you're done. Here is a photo of some 6" long black ones, pack of six, purchased yesterday from HDepot:
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Rubber coated twist ties. The rubber coating protects from arcing out any electrical issues. Can't believe how well these work.

You can order direct from Nite Ize. I bought the bright yellow ones at first, now ordering the bright orange versions. Easy to verify secure on pre-flight inspections. The black ones above won't be as easy to see.

Might even work instead of zip ties to secure loose wires/cables FWF. These bend easy but feel durable. Designed to be used over and over.

Best regards,
Mike Bauer
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Last edited by mbauer : 07-04-2021 at 05:51 AM. Reason: typo-added photo
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  #16  
Old 08-25-2021, 06:25 AM
dfvk8n61 dfvk8n61 is offline
 
Join Date: Jan 2008
Location: Cocoa Beach, FL
Posts: 14
Default One more entry

Thanks to original builder. Works great.
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  #17  
Old 08-25-2021, 05:53 PM
ArlingtonRV ArlingtonRV is offline
 
Join Date: Feb 2005
Location: Marysville, WA
Posts: 568
Default

I can't take credit for these as I didn't make them, nor did the original builder. The guy who did the maintenance for the guy I bought it from came up with these. Really slick idea.

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Arlington, WA
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  #18  
Old 08-26-2021, 06:32 AM
Avengerboss Avengerboss is offline
 
Join Date: Dec 2008
Location: Ramona, Calif.
Posts: 364
Default Cowl pins

Iíve been moving those internally installed pins to the outside like the RV10 cowl pins are done. So much nicer and easier to remove and install. Iíve done this on 7s and 8s.
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  #19  
Old 08-26-2021, 07:00 AM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 3,420
Default upper cowl pin - self retaining

or something like this... you get the idea. compact and no extra pieces. 8 yrs operation and no issues.



or more like this. install and pull them together to lock. they naturally want to migrate together during operation so they stay locked.

heat the wire red before you bend it.

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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 900+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com

Last edited by Steve Melton : 08-26-2021 at 09:26 AM.
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  #20  
Old 08-26-2021, 09:40 PM
jliltd jliltd is offline
 
Join Date: Sep 2013
Location: Rancho San Lorenzo
Posts: 1,158
Default

Quote:
Originally Posted by ArlingtonRV View Post
I can't take credit for these as I didn't make them, nor did the original builder. The guy who did the maintenance for the guy I bought it from came up with these. Really slick idea.

That's how mine are. It works great and is easy to release by feel.
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