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I may have missed something, but did John just draw fuel out of the can up to the pump on the bench and dump it right back in the can, or did he route it through the regulator to build up pressure and then dump it back to the bucket on the floor? I can see the pump self priming with no back pressure from the regulator and rail, but I can't see it pumping air up to 35 - 40 psi against the regulator while trying to self prime.
What did I miss? How exactly did John do his test? ... Jim S.
John Slade wrote:
I did an experiment with the pump on a 4 foot bench, and a gas can
on the
floor. The pump primed itself with no difficulty. Having said that,
a
scenario like this in a plane would be just asking for vapor lock.
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Hi John, I like your test but do not understand your conclusion.
The conclusion wasn't based on the results of the experiment :)
It's my understanding that you need to replicate the temperatures and
pressures for the experiment to be entirely valid.
If the pump will prime with a 4 foot negative head that sounds good to me.
But this only proves it works on the bench under atmospheric pressure and
ambient temperature.
John
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