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Kevlar fuel tanks

Old 02-25-2024, 11:30 AM
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speedracerntrixie
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Default Kevlar fuel tanks

So Iím sitting here wondering why fuel tanks are made from Kevlar if the seam is just epoxy and filler?
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carniceiro (02-26-2024)
Old 02-25-2024, 12:39 PM
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seanreit
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Congrats, you've reached level 2 where some of us regards started making our own tanks out of soda bottles, IV bags, and regular layered fiberglass. Beyond the obvious specification differences between kevlar and other materials, at the end of the day: holds fuel, complies with AMA, yes or no.
Old 02-25-2024, 01:58 PM
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Dave Wilshere
 
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No reason other than bling. Yes, it’s a little stronger at the thickness/weight we want, but when a jet crashes actually a tank that explodes is safer as there is a ‘flash’ fire ball and it’s out. A tank that just ruptures will feed a fire over a longer time if fuel is trickling out and statistically it’s more likely to set fire to the ground…
Old 02-25-2024, 05:33 PM
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RCFlyerDan
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Kevlar tanks are a little less likely to crack, versus some of the ARF, thin fiberglass tanks, if the fueling pump pressure is too high,
Old 02-26-2024, 05:05 AM
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speedracerntrixie
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Originally Posted by RCFlyerDan
Kevlar tanks are a little less likely to crack, versus some of the ARF, thin fiberglass tanks, if the fueling pump pressure is too high,
I would certainly agree with that if they are constructed correctly, the one I posted makes no logical sense being made from Kevlar.
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Old 02-26-2024, 11:05 AM
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camss69
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I actually saw a fuel fitting let go on a Kevlar tank when the guy forgot to unplug the vent and went to fuel up the plane. It still made a mess but the tank didnít break lol.

He did have the fitting installed backwards which is why it let go before the tank Iím pretty sure. But he got lucky that time.
Old 02-26-2024, 01:16 PM
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I had a fiberglass tank collapse during de-fueling. The vent was open but I had the taxi tank attached. Perhaps the Kevlar tanks are stronger and wouldn't have failed.

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