What are those big humps on the cowling above the exhaust stacks of the MK 14 (and as I've seen all Griffon spits)?

wuzak said:

Hollywood director William Wyler was partially deaf in one ear after he passed out filming the movie Thunderbolt! He was flying in a B-24 at the time.

He had flown with Memphis Belle on 5 missions in making that film, which suggests that the B-24 was much louder inside then the B-17..

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