ORIGINAL: opjose
That is NOT correct.
2, 3 or 4 blades it makes no difference.
HOWEVER, SOME ( notably the Hangar 9 PTS ) trainers come with a special fairly oblique low pitch 3 blade prop.
The prop acts as an air brake when you bring the throttle to idle, making it easy to slow the plane down.
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Oh ok. The 3 blades that their RTF and PTS planes come with do look markedly different. Slowing down more easily could contribute to taking part of the challenge out of making a good approach.
ORIGINAL: Missileman
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Some people say 3 blades are less efficient than 2 blades and I think some testing on air turbulence over the blades may tend to prove this.
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In the same thread where I read this claim it was also mentioned that power is less impulsive with 3 blades, so changes in power are more gradual... I thought that might partly explain it... that is if you're making a landing where you need a bit of power input before touch down... you're somewhat protected from over compensating and then making wild changes up and down.
So 3 blades being less efficient would support that general idea.