02-12-2011, 07:08 AM
I like your insights Drew and I love those those rules of thumb!! Never actually thaught of it in those terms.
I particularly like this one
Thrust = Pitch X Diameter^3 X RPM^2 X 10^-10 oz.
I wonder why it's diameter instead of the radius that's cubed?? two blades perhaps??
I wonder how close an aproximation it actually is ?
Definatly going to write those up on the workshop wall
“The knack of flying is learning how to throw your machine at the ground and miss.”
"When once you have tasted flight, you will forever walk the earth with your thoughts turned skyward, for there you have been, and there you will always long to return." ~Leonardo Da Vinci