To be fair "1/2" marks are actually reasonably common, often ending up as prototypes of the later model. You also get them with cars too - the facelifted Mazda MX-5 Mk 2 was the Mk 2.5!

Flight Simulator and other chat
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Indeed.
To be fair "1/2" marks are actually reasonably common, often ending up as prototypes of the later model. You also get them with cars too - the facelifted Mazda MX-5 Mk 2 was the Mk 2.5!
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It's not an official mark in this case... it was not a prototype, it was a jury rig.

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It's not an official mark in this case... it was not a prototype, it was a jury rig.
"1/2" marks generally aren't official - if they were they'd usually go up to the next number... Another example I was thinking of earlier would be the Meteor Mk 7.5, used by Martin Baker for ejection seat testing - the fuselage and wings of a Mk 7 and the tail assembly of a Mk 8...


Douglas built them strong.
