A-10 ESC COOLING. ( OR WHAT ARE THOSE SCOOPS? )

by Eyedoc | August 16, 2019 | (2) Posted in How To

Hi again everyone. This is a follow-up to my article A-10 FIXED LANDING GEAR. A SOLUTION. By installing fixed gear to the FT A-10 there is a lot of real estate (i.e. room)  created in the nacelles behind the motors. Many discussions have lead me to believe that there is concern out there about the ESCs being buried in the wings and potential heat related issues. I cannot say that I’ve actually heard of any occurrences but it did get me thinking. Now that all that room is available in the nacelles why not locate the ESCs in the nacelles and create a forced-air flow-thru ventilation system for them ?


It turned out to be very simple. The supplied Y harness for the power to the motors is plenty long enough to reach the nacelles. Here is a photo :

This is a bottom view of the nacelle looking up thru the existing landing gear opening. Note the fixed landing gear aft of the opening. (See A-10 FIXED LANDING GEAR. A SOLUTION ).  This is a previous article .

From here I needed to create a positive air flow over the ESC so I figured that an air scoop would be the obvious solution.  I made a small scoop out of scrap foam board that would fit inside of the existing gear opening .



Note that the scoop appears to have high sides. If you will note the side-view you will see a hole in the side piece. This is how I secured the scoop. Once in place I ran a barbecue skewer thru the original plywood doublers that were intended for the original axles. This holds the scoop in place and the whole thing is removable by simply pulling the skewer out. 


I actually think it looks kind of cool (no pun intended) but I’m quite sure many of you will take issue with that !!

In order to create the flow-thru air path I created an opening in the back of the nacelle in what should be a low pressure zone. 

I believe that this method could possibly be used for ESC cooling of ESCs buried in the wing if an opening was made in the rear spar at the appropriate location. If any of you do this please let me know how it works out !  I hope this article is good food for thought for everyone and not just on the A-10. There could be applications for similar installations on MANY different planes and prototypes!

SUBMITTED REPECTFULLY.... GARY CONTNER 

COMMENTS

Eyedoc on September 6, 2019
Hey Bert..... Did you get your A-10 kit ? Gary
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bird2jump on September 13, 2019
Not yet Gary. Just came back from a 2 week vacation to Hawaii Big Island. Now I can concentrate on ordering the A10 kit. I like your new recent article on the airflow vents. However in fluid mechanics the airflow will accelerate when there’s a decrease in area. The pressure field follows the velocity field so there should be higher pressure in the rear of the scoops. The higher velocity airflow in the rear of the scoop should nicely cool off the ESC. Regards Bert.
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Eyedoc on September 16, 2019
Seems to work well. I will be working on how to publish videos soon so I can show you how to bend the coil springs into landing gear. Gary
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Eyedoc on September 16, 2019
Bert. In re- reading your comment I see what you are saying. In the article I was referring to a presumed low pressure area behind the exit (external to the nacelle ). I think we’re talking apples to apples ! Gary
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bird2jump on September 18, 2019
Ok Gary glad to set things straight. Looking forward to your self made coil landing gear springs with your upcoming video. Bert
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A-10 ESC COOLING. ( OR WHAT ARE THOSE SCOOPS? )