Need help identifying some parts

[kirbymcrae]

My great uncle recently passed away, and in his basement were some (we are assuming) airplane parts. He grew up on an airport, then got 2 masters in aeronautical engineering and taught at Princeton. He was also head of design for the 206 and 208 Cessnas. So who knows where they came from.

My guesses:

1. These are the skis. Any info on brand or if they are homemade? One was wrecked when my great grandpa took off from snow and by the time he returned, there was none left. He had to land on the edge of a snow fence, and went off the end and ground looped the cub.

2. Engine mount?
3. A piece of exhaust?
4. A cowling for a plexiglass canopy or something.

If you happen to know what engine or airplane these are off of great, if not just post what you think they are.

Thanks,
Kirby