Ultrasonic clean.....A Cowl??? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 03-26-2020, 10:10 PM   #1
Max
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Ultrasonic clean.....A Cowl???


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I sold a plane to a fellow that asked me to fit the cowl onto it.

The cowl was in good shape but was cut out for an engine that the previous owner had in it.

I like using CA and fiberglass to stiffen a cowl. In places that had holes or cutouts I didn't want, I would patch with fiberglass on the inside, add a second layer to the outside and fill with baking-soda&CA

The only problem was the cowl was dirty from fuel-fling and other dirt. Although I washed it thoroughly as best as I could, it still looked dirty inside, and still felt a little slimy. CA/Fiberglass repair would surely not last more than a season if I tried to fix it in this condition.

Presently I have a 2L ultrasonic tank that I absolutely love. It gets engines and small parts cleaned beautifully. In the year that I have had it, I have experimented with different cleansers for different materials that needed cleaning.

On a whim, I thought I would throw the cowl in and see what happened. The cowl would not fit completely into the tank. I could only do half at a time.

My cleaning mix for the cowl was 2L of water (tank capacity), one teaspoon of Tide powdered soap, and setting the water temperature to 60deg Celsius.

After 15 minutes.. WOW!!! I could not believe how clean the first half of the cowl had gotten. I am sorry I didnt take a before picture, but you can already see the difference between the half I cleaned and the other side.


Flipped it over and did the other half. WOW!! It was super clean. The added benefit was even the outside of the cowl was spotless!

Cowl was dried and repaired. There was not a spot of oil anywhere, so adding cloth/CA was effortless and the bond was excellent. Then re-cut to fit the engine. She looks great!
I love this gadget!
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Old 03-27-2020, 08:14 AM   #2
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Re: Ultrasonic clean.....A Cowl???

Thinking on buying one of these ultra sonic cleaners. What brand, what size and where did you purchase it.
Thanks in advance
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Old 03-27-2020, 08:24 AM   #3
Max
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Re: Ultrasonic clean.....A Cowl???

Quote:
Originally Posted by sirguy View Post
Thinking on buying one of these ultra sonic cleaners. What brand, what size and where did you purchase it.
Thanks in advance
I have a 2L tank I mail ordered. You can get them from Amazon. I paid $100 for mine. I would caution to not buy anything smaller than 2L, it sounds big but its not. Its good enough for all my engines so far, but barely. 4L would be best if you can afford it.
https://www.amazon.ca/Flexzion-Comme...5315388&sr=8-7


If cleaning aluminum engines you have to use a cleaner that is compatible with aluminum- I use Crystal Clear. You can get it from a shop in Newmarket Ontario.

Other parts like steel, brass, plastic, (or in my case, the fiberglass cowl) etc, you can use dish soap or my favourite: Tide powered laundry soap
60deg Celsius seems to be the best temperature.
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Old 03-27-2020, 09:49 AM   #4
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Re: Ultrasonic clean.....A Cowl???

Max, that looks like the same one that I have; like you, purchased from Amazon. I've used it for years to clean small parts effectively and absolutely love it. Never thought of of cleaning fiberglass parts. Thanks.
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Old 03-27-2020, 10:22 AM   #5
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Re: Ultrasonic clean.....A Cowl???

Yes , ultrasonic is the best way to clean but cleaning solutions and the method used are also important. If the paint finish and the material can handle it , I find that using TSP mixed with water to be a much better solution than just soap and water but make sure the TSP is compatable with what is cleaned. On any surface that is rough like the inside of the cowl, a small brush also helps a lot. Much more elbow grease required and not quite as good as ultrasonic but should work well. Also even a thorough rinsing is needed to remove any oils left behind on the surface ,even if hand dried.
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Old 03-27-2020, 02:09 PM   #6
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Re: Ultrasonic clean.....A Cowl???

I’ve thought of getting one of those things. My optometrist uses an ultrasonic cleaner to clean glasses, so there’s yet another use!
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