Aerodynamik
January 27, 2018 at 5:49 pm

Boulton-Paul Sea Balliol T21

I am just wondering why they went from the Mk1 and 2 and then jumped to the Mk21 for the Sea Balliol. Can’t think of any other aircraft that do that…any ideas?

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By: Graham Boak - 27th January 2018 at 20:02

Ditto (eventually) the Seafire 45-47 series, and the Sea Fury Mk.10 (didn’t have to go so far up once the RAF Furies were cancelled).

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By: Lee Howard - 27th January 2018 at 19:09

There were lots of examples of this; basically it was to differentiate them from RAF variants. Also applied to foreign exports, usually in the 50-series.

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By: Consul - 27th January 2018 at 18:31

Likewise with the Sea Venom.