Hmm, lets see
Standard Cam Parallel - T= 4.R.sin(alpha) Alpha is cam angle
Standard Cam Flared - T= 4.R.sin(alpha-beta) Beta is flare angle.
Clearly it relies on beta - as beta approaches alpha then it becomes sin(0) which is 0
I had since guessed he was looking at the whole flare, doubling beta, which is measured from vertical here, is that how you are getting half? . . .
Ill have to find an engineer . . . |