Re: Europa-List: Re: 2-blade props

[rparigor@suffolk.lib.ny.us]

Hi Raimo
"More blades is a compromise. 
Just one is best 
most efficient.
 They (Germans) have done that, with a
counterbalance of course."
I made a 1 bladed prop for a hot Cox
020 model motor. Worked for hours and hours trying to get it to
bereasonably balanced with a die grinder spinning it up. Not
too much joy when approaching the 20K plus RPMs the engine is capaible of.
Less RPMs not too bad, butI think the differential thrust caused
harmonics thatI was unableto get rid of.
Ron Parigoris