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Post  Michpatriot Wed Feb 01, 2023 10:46 am

Robart connectors glow proof? 16752610

Any of you fellas have any experience with these fittings being glow fuel proof?
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Post  balogh Wed Feb 01, 2023 11:57 am

Wow, I have been looking for these fittings, do you have a link to the source? I think most plastics will endure contact with glow fuel...some brittle materials like the stem of cotton ear buds, made recently from more environment friendly plastic, was found to soften...
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Post  batjac Wed Feb 01, 2023 12:32 pm

I have used these fittings for balloon and bladder tanks up to 35% nitro. Never seemed to have a problem.

The Airhead Mark
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Post  aspeed Wed Feb 01, 2023 2:19 pm

That is what they are made for, so I guess they work. Here is another company that makes them, assuming they are still in business. Fourmost also had a nice streamlined motor mount for TDs and .40 size motors. https://www.fourmostproducts.com/our-products/fuel-fittings/
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Post  Michpatriot Wed Feb 01, 2023 6:55 pm

These are Robart brand for air retracts..when I subjected one of the black ones to a loop of fuel tube filled completely with 35% glow it turned what was in the tube black after 6 hrs..and the odd thing being a sealed loop was the air that appeared..more than half the fuel disappeared..not leaked..absorbed? Into the plastic? Odd.
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Post  Michpatriot Wed Feb 01, 2023 6:58 pm

Robart connectors glow proof? 16752913
This was full..1 tiny bubble..so Odd.
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Post  Michpatriot Wed Feb 01, 2023 7:07 pm

Balogh might try Google for this brand? Not sure if im liking these yet..

Robart connectors glow proof? 16752914
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Post  HalfaDave Wed Feb 01, 2023 9:58 pm

Hi mich,

Do they soften with acetone?
If so, probably ABS and not good for raw fuel.

There was a cool article in a 70s era RCM mag about identifying types of plastics.
Including burning slivers to see what colour the flame was...
Miss my old RCM mags,

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Post  Michpatriot Wed Feb 01, 2023 10:37 pm

Well let's find out..
Will report back..Robart connectors glow proof? 16753110
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Post  Michpatriot Thu Feb 02, 2023 7:49 am

Well they didn't become one with their acetone solution and turn to dope..stayed hard after hours immersed..guess they're good to go..thanks for the litmus test Dave!
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Post  Michpatriot Thu Feb 02, 2023 7:51 am

Balogh i don't know how to PM on this site yet but if you can't find these couplers I have a couple id send ya..
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Post  balogh Thu Feb 02, 2023 7:53 am

Thanks a lot Mich, for your generosity, but remember I am located in Hungary/Central Europe so mailing here will be a bit expensive..Anyway, I appreciate your kind offer...
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Post  Levent Suberk Thu Feb 02, 2023 8:24 am

Michpatriot wrote:Robart connectors glow proof? 16752913
This was full..1 tiny bubble..so Odd.

Hi Mich, they are air bubbles. You can try it with water instead of fuel, result will be same.
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