51fixer wrote:
bdk wrote:
Sta 12 = 4.840w 3.398t
Sta 18 = 6.150w 1.829t
Sta 24 = 7.510w 1.095t
Sta 30 = 8.120w 0.790t
Sta 36 = 7.840w 0.632t
Sta 42 = 7.030w 0.498t
Sta 48 = 5.720w 0.356t
Blade stations are computed based on a complete assembled prop.
The blades need the tapered bore bushing attached otherwise you need to .250 to the blade.
I have forgotten the distance that separates the base of the blades on the spider. IIRC it is a little over 9" from the blade base that the 12" station is marked.
I will see if I have the data when I get to work.
From my 1983 Blade Overhaul Book-
6101A D 56151 AMS4130 10'0"
The basic design of the 6101A Blade is a 10 foot dia prop when assembled. The designation of 6101A-12 means it is a 12" reduction from the 10' base dia or 6" from each blade. A -18 is 9" from each blade or 3" shorter than what is used on the T-6.
Further reductions are allowed up to an authorized amount.
From-
TABLE 411
DISTANCE FROM BUTT FACE TO 12-INCH STATION
SIZE (INCHES) THICKNESS (INCH) (INCHES)
SHANK(1) 12" STA(2) Flange(3) No Flange(4)
B 10. 00 No flange --
D 9.56 0.250 9.81
E 9.19 0.312 9.50
H (6959A) 9.19 0.312 9. 50
H (7121A) 8. 948 0. 430 9. 38
(1)BLADE SHANK SIZE- (Type of blade, for a T-6 it is D)
(2)DISTANCE FROM BUTT FACE TO 12-INCH STATION
(3)BUSHING FLANGE THICKNESS (T-6 is .250)
(4)BUSHING FLANGE FACE TO 12" STATION (Adding Bushing Flange Thickness onto the Bare Blade Dimension, T-6 is .250)