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Pills & propellers
Bob,
Thanks for one more entertaining text and valuable lesson. Hoping the question's not too stupid: while you mention diameter and pitch and some parameters I don't really understand, why do you never discuss the number of blades on the prop? It seems obvious that a two-bladed prop is by far the easiest to make. But at my home airfield I see a lot of 3-bladed, and one ultralight even sports a 4-blade on a Rotax 912. Why? What's the importance? |
#2
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Pills & propellers
On Nov 22, 7:27*am, jan olieslagers
wrote: It seems obvious that a two-bladed prop is by far the easiest to make. But at my home airfield I see a lot of 3-bladed, and one ultralight even sports a 4-blade on a Rotax 912. Why? What's the importance? -------------------------------------------------------------------------------------------------------------- Dear Jan, Most of my messages are directed toward people using converted VW engines. The fellow with the Rotax 912 is far outside our field of interest. But as a point of interest, the number of blades is normally dictated by the ground clearance and the amount of power that must be converted to thrust. -R.S.Hoover |
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