I believe the smell could be Toluene, used as an octane booster. (Maybe)
Dennis
On 5/02/2015 2:29 pm, Ian Mc Phee wrote:
I must admit I used epoxy resin Ciba/G 3600 and not vinyl ester. I
am going to try again using vinyl ester.
I am doing another trial with shell/liberty 98 and BP 98 with smell.
In every case the shell smells like turps is added where as BP smells
normal like you expect fuel to smell like. People are smelling the
difference 100%. Some are describing the smell as paint thinners.
Shell is a golden bright yellow colour where BP is more normal fuel
colour.
In germany they have zero issues of fuel turning clear fuel lines a
real dark brown so dark you can not see brought be in 2 months. Sure
happens here with liberty /shell
So 98s are not the same.
Ian mcphee
On 04/02/2015 1:31 pm, "DMcD" <[email protected]
<mailto:[email protected]>> wrote:
>>I'll stick to Avgas in the BD-4 even though the 7:1 compression
ratio engine (same as Super Cub) can handle unleaded from an
octane rating basis.
Unless things have changed, with some two strokes used in SLGs like
the Solo engines, the manufacturer recommends using 95, not Avgas. The
claim is that Avgas makes the engine run rougher and vibrate more than
95.
It's difficult to get a real picture but a lot of the US experience,
where they tend to overcompensate and use Avgas instead of 95, seems
to suggest they have more problems overall, not less. Then again, they
can't get the recommended Castrol 2 stroke oil either.
I tend to agree with Mike here regarding resins too. It's really
difficult to point your finger at the fuel without knowing more about
the resins used in the layup.
And the problems and expense of wing fuel bags seem to be not worth
the effort. The recommendations in the manual that I have read say
that they cannot be left with fuel in overnight, that they cannot be
entirely drained either but need to have a small amount of oil in
them. They have a very short life span (8-10 years?) and are sodding
expensive to replace.
Probably cheaper to replace than a fuselage mounted glass tank though!
D
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