Johnnybgoode
Well Known Member
Looking for ideas on how to stiffen a couple areas on my upper cowling. Inflight, at higher speeds, I see a couple of depressions aft of the rear baffle line. One is right on the top and one is just over the oil door.
1. Anyone else notice these?
2. What have you done about it?
I'm thinking there should not be a low pressure area back there unless air is getting past my baffles. I do have one segment that often turns back, so I think this is the problem but I'm not sure whether the not-so-rigid upper cowl is the issue or whether longer baffling is needed.
I'm considering stiffening the cowl with either strips of AL angle fluted to curvature or laying up some fiberglass inside the cowl. AL strips obviously require riveting, which I really don't want to do to my cowl but I'm seeing signs of cracking just aft of the oil fill door so need to find some way to alleviate the flex back there.
Thanks for reading,
Patrick
1. Anyone else notice these?
2. What have you done about it?
I'm thinking there should not be a low pressure area back there unless air is getting past my baffles. I do have one segment that often turns back, so I think this is the problem but I'm not sure whether the not-so-rigid upper cowl is the issue or whether longer baffling is needed.
I'm considering stiffening the cowl with either strips of AL angle fluted to curvature or laying up some fiberglass inside the cowl. AL strips obviously require riveting, which I really don't want to do to my cowl but I'm seeing signs of cracking just aft of the oil fill door so need to find some way to alleviate the flex back there.
Thanks for reading,
Patrick