So I finally completed (so I thought) the cowling install with 100% skybolt as well as the prop (FP wood) and spinner. Although it all aligned nearly perfectly while the cowl was clecoed, enough slop in the skybolt system has allowed a bit of misalignment at the cowl spinner interface, not to mention the 13" spinner is a little smaller than the cowl anyway.
Not a huge deal so I added some glass and epoxy to the inside radius of both cowl halves and traced the spinner projection onto the cowl face. I've ground the cowling down but so far have left about 1/4" along the bottom half to account for any engine sag and am preparing to grind the top half a little low by an equal amount.
The question is how much sag have you guys experienced as you've broken everything in? Did the sag settle to some value and has stabilized? This will help me adjust this fitting to the likely final engine/spinner position. I am using the VANs aerobatic engine mounts. Thanks!
Ken
Not a huge deal so I added some glass and epoxy to the inside radius of both cowl halves and traced the spinner projection onto the cowl face. I've ground the cowling down but so far have left about 1/4" along the bottom half to account for any engine sag and am preparing to grind the top half a little low by an equal amount.
The question is how much sag have you guys experienced as you've broken everything in? Did the sag settle to some value and has stabilized? This will help me adjust this fitting to the likely final engine/spinner position. I am using the VANs aerobatic engine mounts. Thanks!
Ken