09-04-2013, 05:40 PM
I like to think I'm a pretty smart fella... but I would have thought that an irregular shape like that at the the trailing edge of the prop would have generated more turbulance not reduced it... just goes to show, how important it is to think outside the square.
Here's one to make you think a little. What about a 4 blade prop with 2 blades at say 10" pitch and 2 blades at 12"pitch. I know they will bleed energy because they will work against each but propellers spinning in the air are only about 70% efficient, so will the 10's help by giving you that initial thrust and then the 12's help with top end as speed increases or do they both cancel each other out and give you 4 inefficient 11" pitch blades?
Here's one to make you think a little. What about a 4 blade prop with 2 blades at say 10" pitch and 2 blades at 12"pitch. I know they will bleed energy because they will work against each but propellers spinning in the air are only about 70% efficient, so will the 10's help by giving you that initial thrust and then the 12's help with top end as speed increases or do they both cancel each other out and give you 4 inefficient 11" pitch blades?
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