Tumper
Well Known Member
I am installing a Whirl Wind 200RV prop with a standard Van?s cowl. My propeller came with a two piece back plate. The two halves of the back plate are held together by the mount plate and three bolts on radials from the center of each side of the cowl back plate. Two of the three bolts are on about a 45 degree angle to the face of the plate and one is on the outer diameter of the back plate. The two bolts on the angle are rubbing my cowl. Has anyone else had this problem?
I set my cowl spacing a long time ago using a single piece back plate from Whirl Wind and I?d rather not make adjustments to the cowl at this point. Whirl Wind feels like the screws are necessary to keep the back plate from vibration and eventually cracking. They suggested trimming the cowl. I am thinking of replacing the round head screws with countersunk screws and tinnerman washer.
Comments?
I set my cowl spacing a long time ago using a single piece back plate from Whirl Wind and I?d rather not make adjustments to the cowl at this point. Whirl Wind feels like the screws are necessary to keep the back plate from vibration and eventually cracking. They suggested trimming the cowl. I am thinking of replacing the round head screws with countersunk screws and tinnerman washer.
Comments?