RE: West .50V1 bench run
No, not really. It wasn't wet with fuel at the time, there were no bumps, and I had some sort of a hold on the prop as I pulled it through compression as I recall. The fuel draw is modest like that, notice I had to pop the end of the pipe to get enough fuel in.
EDIT: nope. I watched - I was doing this by habit so I had to think about it. I hold the prop firmly as I turn it through compression, then the quick turning motion is the not-so-hazardous half of the cycle where I bring around to the compression stroke again and grip it to pull through.
It does sound pretty good on the open pipe. The Demon howls in the air with this one. This is a prelude to putting it back on the Demon in better tuned form and getting radar on it.
MJD