Thanks Alex,   it is a beginning.  However,  one of our design goals is
to have both injectors on the cool side of the engine.  I wish we could
do it the way you have drawn it up,  it would be easier but the risk of
fire is unacceptable.   Jerry

Jerry,
It's a good thing keeping fuel from heat.
Spilling fuel anywhere isn't good!

However from my experience, heat isn't the worst cause of igniting fuel,
I've spilt plenty of fuel on  hot motorbike motors and exhausts and no
fire - if I tried to start the bike covered in fuel it might have been
another story.
So at the end of the day, spark or an open flame is more of a risk than
heat - so I personally wouldn't want to be spilling any fuel on the spark
plugs either, thinking it would be the safer side.

George (down under)

We have had two in-flight fires started by oil leaking on the exhaust.
An aircraft engine is not the same as a car engine. The exhaust runs
cheery red all the time. A car engine generates far less heat
in the exhaust manifolds.

The spark plugs only sparks externally if they wire comes completely off.
On a aircraft engine the rubber boot should be tie wrapped around
the spark plug or some other means to make sure the wire does not
come off the spark plug.
 
Paul Lamar

 
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