>>As an example, if we have a 7148 prop we can first calculate the 75% radius point as ½ x 71 inches x 0.75 = 26.6 inches. To calculate blade angle we have 48 inches = (2 pi) (26.6 inches) (Tangent of blade angle in degrees). Solving this equation for blade angle yields 16 degrees<<
Or, you can look it up in the service manual. For a48 pitch, McCauley specifies 17.6* +/- .25* at station 24 and 14.4* +/- .20* at station 30. This is independent of length, though. John Cooper Skyport Services 4996 Delaware Tnpk Rensselaerville, NY 12147 518 797-3064 www.skyportservices.net
