Carl Pattinson wrote:
>
> Unfortunately FIRESLEEVE on the fuel lines (in the engine bay) is part of a
> mandatory mod (here in the UK at least) to reduce the possibility of vapour
> locks.
>
Out of curiosity I once did a crude test on the stuff, using an oven,
with a digital temp meter probe inside the sleeve, hot air blocked
---From flowing inside. The internal temp rises quickly. Repeating the
test with aluminum foil wrapped around the firesleeve made a
significant difference. Like, 10 minutes to reach 160F, in 250F
oven. With cool fuel flowing inside during climb and cruise, seems
like it should carry enough calories out to stay ahead of the game in
a hot day. It could mean the difference during prolonged idling,
where fuel isn't flowing much, as the fuel line and contents have to
be heated too. I'd spiral wrap a strip of foil around the sleeve, and
shrink heat-shrink tubing around it, in place, with the bends
established. Preferably a light color heat-shrink by a related rule
applicable here.
Regards,
Fred F.
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