Robart connectors glow proof?

Michpatriot Wed Feb 01, 2023 10:46 am

Any of you fellas have any experience with these fittings being glow fuel proof?

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...

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

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/

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.

Michpatriot Wed Feb 01, 2023 6:58 pm

This was full..1 tiny bubble..so Odd.

Michpatriot Wed Feb 01, 2023 7:07 pm

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

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,

Dave

Michpatriot Wed Feb 01, 2023 10:37 pm

Well let's find out..
Will report back..

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!

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..

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...

Levent Suberk Thu Feb 02, 2023 8:24 am

Michpatriot wrote:
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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Robart connectors glow proof?

Robart connectors glow proof?

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