Join Date: Sep 2003
Location: Auckland New Zealand
Thanked 33 Times in 30 Posts
Rep Power: 12
The end of your inserted article probably holds the clue - I reckon your prop has something wrapped around it. That would account for the lower than normal RPM, the lack of smoke when revving free, the rapid fall-off in speed at a lower RPM as well of course as the black smoke.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
"Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying."
Arthur C. Clarke