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Propeller Blockage factors

Propeller Blockage factors

Propeller Blockage factors

(OP)
HI

I am looking for a method for calculating the thrust loss due to propeller body interactions (due to the increase in local velocity & pressure effects).
 I currently am using the S.B.A.C. Standard Method of Propeller Performance Estimation, but would like to find a second method to estimate the loss. The methods in Torenbeek & Roskam originate from the SBAC method.

Duncan

RE: Propeller Blockage factors

I dont have the SBAC and cant find toreenbeek, where abouts in Roskam's is the method shown??

RE: Propeller Blockage factors

(OP)
HI

When I said Roskam, I should have said Lan & Roskan meaning "Airplane Aerodynamics and Performance" rather than “Airplane Design” which strangely is missing any mention of it.

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