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  #1  
Old 11-19-2021, 05:58 PM
HFS HFS is offline
 
Join Date: Aug 2009
Location: Lemoore, CA
Posts: 409
Default Cowling "Puter Oner" For My Rocket

After 20 years of putting the lower cowling on my Rocket by myself, I have finally gotten to the age of not being sure I could do it any more without the possibility of doing some unrecoverable damage - hence the need for a "Puter Oner".

I've been thinking about it for a while, and thought I had a pretty good working "idea" to start from.

Below is what came out of the shop - the bare frame looks like a simulator for roping Texas longhorns!

The other two pics show the cowling positioned under the motor - in a horizontal position; and, then with the "scissor" lift advanced - the rear of the cowl sits on the top of the gearleg fairings, which act as a support at that point, making the rotation up & under the spinner much easier physically.

The scissoring aspect is advanced either by a manual crank handle, for precise placement, or by cordless drill for a faster advance. Either way works - their use just depends on the need for speed or precision.

There is a manual "foot" brake at the front of the frame to give a bit of stability after the initial placement under the motor - otherwise, with 4 casters it's like skating on ice. I elected not to use brakes on the casters because I didn't know if I'd be able to access them at the critical time of placement. Where the foot "pad" is now, I can just reach down to set it.

YMMV - HFS
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  #2  
Old 11-19-2021, 06:30 PM
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DanH DanH is offline
 
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Very clever! My compliments sir.
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  #3  
Old 11-19-2021, 06:58 PM
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wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 4,862
Default Cowl carriage

That's a great idea!
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Larry Larson
Estes Park, CO
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Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved (3,000+ hours)
Empennage, wings, fuse, finishing kit done. Working FWF
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I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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  #4  
Old 11-19-2021, 07:11 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 6,381
Default

Elegant mechanism! Well done.

I made a crude Rube Goldberg holder for (-7) my floor jack but it is not easily adjusted vertically. I need a better method.

Question, so, you pivot the cowl about the lower aft edge near the FW? And it will pass the aft side of the spinner?

I would love to do that to clear the protruding gear fairings. Honestly, never tried it cuz did not think it would fit.

Also, would an Acme 1/2 10 TPI work better for the jack?
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Last edited by BillL : 11-19-2021 at 07:27 PM.
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  #5  
Old 11-19-2021, 07:21 PM
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PaulvS PaulvS is offline
 
Join Date: Aug 2019
Location: Western Australia
Posts: 835
Default Beauty

That looks really good, a clever design and fabricated very nicely. Now, what color are you going to paint her (too beautiful to be "it"!)?
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  #6  
Old 11-19-2021, 07:23 PM
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Ironflight Ironflight is offline
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Location: Dayton, NV
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Very, very cool - much nicer than my long-time method of supporting the cowling on a knee with that foot off the floor, while standing one-legged on the other foot!

Will have to consider this as the calendar advances……
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  #7  
Old 11-19-2021, 07:58 PM
Kyle Boatright Kyle Boatright is offline
 
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Location: Atlanta, GA
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Very nice. I use a crude arrangement of a piece of foam rubber sitting on top of an oil case, which rests on a plastic toolbox. It works, but...yeah.
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  #8  
Old 11-19-2021, 08:45 PM
Zero4Zulu Zero4Zulu is offline
 
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Location: Scio,Oregon
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I made this contraption. I made clips that hook into the side piano hinges and used Dacron fishing line to wrap around the inside PVC pipe to real up the line and raise the cowel. Also incorporated thumb screws to lock down the PVC pipe so it would stay up after raising the cowel. It works pretty swell…

Darn picture is upside down… how do I fix that?
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Last edited by Zero4Zulu : 11-20-2021 at 08:27 PM.
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  #9  
Old 11-19-2021, 10:21 PM
Mikeyb Mikeyb is offline
 
Join Date: Nov 2018
Location: Pasadena ca
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Upside down or not I got the idea and am gonna try it. Thanks
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  #10  
Old 11-19-2021, 10:51 PM
JDA_BTR JDA_BTR is offline
 
Join Date: Dec 2013
Location: Colorado Springs, CO
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I'd like a pic of how you get that pipe on top then rig the cowling to it before it is lifted up?
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