X-Mozilla-Keys:                                                                                 

I am agreement with you, David.

    Removing the prop just seems like it should be unnecessary. However, I
like your idea of a mirror although I suspect the viberation at that rpm
would jiggel the mirror enought to blur the timing marks, but what the
heck, its easy enough to try.

Ed

David Carter wrote:

Ed, 

If the vibration affects the mirror too much (if mounted to hard point on
engine), then the mirror might be held on an "arm" that could be secured to
something off of the airplane, or just held in position by your left hand
while you use the strobe light in the right hand.

What RPM are we talking about (and prop blast)?  We are not talking about
centrifugal advance or calculated advance by the EC-2, are we, just "fixed"
timing, at idle and at full power?  If "fixed", then engine would be timed
at or near idle, with minimum prop blast, so maybe holding a mirror on an
extension from a "safer" position back by the firewall would be feasible.

A means of overcoming vibration used on UH-1 Huey helicopters with video
cameras mounted at the side door was to put a silicon gel pack between the
"hard parts" of the mount and a plate attached to bottom of camera.  Just a
thought - was very effective.

David Carter

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