RE: Vacuum Leak Detection

[Malcolm White <M.White@sni.co.uk>]

>Who said vacuum leaks can be detected by wafting propane/butane around
the
>engine and hoses until the engine revs higher...indicating the gas has
been
>sucked in at the vacuum leak?

Despite the fact that I don't understand how the propane ingression
would increase the engine revs, what I do understand is that you
wouldn't worry about the vacuum leak from the comfort of your hospital
bed. Propane/butane vapor in the presence of such a potential source of
ignition is foolhardy in the extreme. (And yes, I am speaking from
experience as a commercial hot air balloon pilot who has to attend
regular LPG fire training)

Malcolm.