PMag Cooling Shroud
 

Someone in another thread mentioned printing a cooling shroud for Pmags. Here is what I installed on mine:



Printed from Nylon - wasn't one of my easiest print jobs, but it does work. I've been using mine for about 6 months now.

Don

Amazing what the printers can do.

Did you record board temperature before and after?

Interested in selling those, Don? I would like to have a pair.

Ron B

That's a great idea!

Can you make it like these? That way you won't have to flex the plastic as much to snap them on.
It might be worth adding something that allows the ends to be held tight, possibly by safety wire

I second Bill's request. Simple design!

Ron B

I chose to feed the cooling air from the end because I think the air will mainly flow through only one branch if it is centered, and I wouldn’t know for certain if air was going both ways (with apologies to Schroedenger :) )

Certainly it’s easy to model and print a centerfeed version.

As for testing, I haven’t done any since it was recommended by the manufacturer. I believe the onboard logging in the PMag can record temperatures, but I’m not aware of how. Plane is down until spring, but I’d certainly report back if it’s simple to access.

Email me if you’re interested in a pair of these...
rv6wallet
GML
dotcom

My metal ones feed from the center and seem to work.
The P-mags record a max temp but it is from the beginning of time. So if you have already hit max temp, it won't be overwritten. The max temp is typically set on a hot day, you shut down for fuel, and start-up without the engine cooling.

There is a current temp on the P-mags, which our EIC32 logs and writes to a .CSV file.

Don,

Check your PM's.

Yes please, I?ll take two. With a black cowling I?ll do anything to keep the temps down.

Please let us know how to get a pair. Thanks

I would also like a couple of these if they fit the current 114 mags, although I question how much good they?ll do without any data. It seems that the most temperature critical time for emags is after engine shut down, especially on warm days. The only thing I can think of to combat this inner cowl heat rise is to open the oil door after shut down. Keeping the cowl temps below 200* in flight shouldn?t be too difficult (although I would like to make sure with your shroud), but after shut down, when temps can elevate might be a challenge.