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Building Tips and technical articles. => 1/2 A building. => Topic started by: Paul Smith on April 09, 2020, 06:43:16 PM

Title: My new reed valve engine testor
Post by: Paul Smith on April 09, 2020, 06:43:16 PM

Check this out.  It's a tight-fitting collar designed to fit a reed valve .049 or .020 and be secured with only two c-clamps.

It's laminated from two layers of 1/8" plywood with a 1/16" plywood on the back with cutout for the ears.

So I can cycle five Babe Bees and five PeeWees through the fixture without messing with tiny screws every time.

Title: Re: My new reed valve engine testor
Post by: Paul Smith on April 09, 2020, 06:45:04 PM

Back view.

It's painted with 40-year-old K&B epoxy.

The eye bolt has been removed. It was just for painting.

Title: Re: My new reed valve engine testor
Post by: Dave Hull on April 11, 2020, 12:29:27 AM

Nice idea. Clean. Not sure the clamps are big enough to provide real safety margin for a Cox .049 though. So you should put the eyebolt back in and attach some 1" chain to it. Maybe wrap that around your truck bumper a few times, or better yet, through the tow hooks. That would pass OSHA as long as you have certs and load test on the chain.

McDivot

Title: Re: My new reed valve engine testor
Post by: john vlna on April 11, 2020, 01:37:47 PM

Neat idea Paul, should save some time

Title: Re: My new reed valve engine testor
Post by: Tim Wescott on April 11, 2020, 05:29:05 PM

Nifty!

You could run 1/4-20 carriage bolts through the assembly from the back, and put the plywood piece on with wing nuts.  If you wanted to get fancy.

Title: Re: My new reed valve engine testor
Post by: 944_Jim on April 12, 2020, 10:33:35 AM

Awesome! I may copy this just so I don't fight lots of littles screws.

Thanks for sharing.

Title: Re: My new reed valve engine testor
Post by: david beazley on April 13, 2020, 11:30:37 AM

Here's a link to one I built out of some aluminum, very similar concept
https://stunthanger.com/smf/12-a-building/reedy-test-stand/msg300103/#msg300103

Title: Re: My new reed valve engine testor
Post by: Dane Martin on May 07, 2020, 08:19:52 AM

Quote from: Dave Hull on April 11, 2020, 12:29:27 AM

Nice idea. Clean. Not sure the clamps are big enough to provide real safety margin for a Cox .049 though. So you should put the eyebolt back in and attach some 1" chain to it. Maybe wrap that around your truck bumper a few times, or better yet, through the tow hooks. That would pass OSHA as long as you have certs and load test on the chain.

McDivot

This is why I like you Dave. Always safety minded and considerate....