cubgirl
Junior Member
- Joined
- Jul 14, 2015
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After my "annual" I noticed the Sensenich prop has a 1"X2" area where the paint/varnish is gone. My friend was concerned about it. So I looked it up too. Here's what I found:
"Composite or Wood Delaminations. Although not susceptible to corrosion like metal propellers, wood or composite propellers have special problems that can lead to an unairworthy condition. Wood or composite propellers are susceptible to internal damage from small stone strikes that can create delamination or microcracks and permit intrusion of moisture. Moisture will cause expansion of existing cracks and delaminations. When moisture freezes within the blade, it causes delamination. When inspecting wood or composite propeller blades, look for cracks or delamination on the blade surface and at blade edges. In wooden propellers, check the gluelines for debonding; look for warp and loss of protective coating (paint or varnish)."
Is an approximate 1" x 2" area on the prop without any varnish a problem? Should the mechanic have coated it before releasing it?
"Composite or Wood Delaminations. Although not susceptible to corrosion like metal propellers, wood or composite propellers have special problems that can lead to an unairworthy condition. Wood or composite propellers are susceptible to internal damage from small stone strikes that can create delamination or microcracks and permit intrusion of moisture. Moisture will cause expansion of existing cracks and delaminations. When moisture freezes within the blade, it causes delamination. When inspecting wood or composite propeller blades, look for cracks or delamination on the blade surface and at blade edges. In wooden propellers, check the gluelines for debonding; look for warp and loss of protective coating (paint or varnish)."
Is an approximate 1" x 2" area on the prop without any varnish a problem? Should the mechanic have coated it before releasing it?
