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Propeller pitch

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Magisterol

Well-Known Member
Joined
Nov 26, 2019
Messages
296
Hello guys. I am thinking about changing the prop on my Mustang II and I found this article done by Brien Seeley from CAFE Foundation about a Mustang Ii. It uses a Pacesetter 68x66 DxP prop. It says top speed is 210mph at 2868 rpm. My prop is 68” D and a blade angle of 25.85deg at .75R, which gives me pitch of 74”. My speed tops at 165 kts TAS, when the prop turns at 2900rpm. My question is how a smaller pitch can allow a higher speed? I was looking for prop charts from the current prop manufacturers, bot certified and experimental, but most of them didn’t answer and those that answered, said they don’t use charts, just templates. Any thoughts? Thanks. The title of the article is below.
 

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