Just ‘cos you’re 2-dimensional…

Too short. 🙂

Sorry James, missed that.
However, paraphrasing ferociously from the Putnam book:
Early production Blenheim became prototype Bolingbroke 1. Initial production order cancelled to avoid disrupting Blenheim production and replaced with a further order for Blenheims on the understanding as many as possible would be produced to Bolingbroke standards. After 66 had been produced it was possible to change to the Bolingbroke but to avoid confusion it was decided to use the name Blenheim IV.
The Blenheim IV was adopted for licence production in Canada, the name Bolingbroke being retained.

Just detail differences surely?

Point taken Bruce. Besides the manufacturer, were there many differences between the Bolingbroke and the Blenheim MkIV?

None whatsoever, see your Putnam book on Bristols. 🙂

Are supercharged and geared air-cooled inverted V12s that easy to get? 🙂

Just looked at DH Aircraft since 191?. Looking at the thrust line on the Don, it looks like it could be geared. Difficult to tell with the Albatross as the spinners are so large.

The website I referred to above stated the power of the Gipsy King as 420hp. That sounded reasonable for two Gipsy Six’s on a common crankcase, unsupercharged. However, the Putnam book says both the Gipsy Twelve and Gipsy King were 525hp which suggests they were exactly the same and supercharged.

A touch of the Typhoon syndrome, a tendency for the tail to part company with the rest of the airframe. Fortunately not in flight, however.

If anybody has a decent side view of the Albatross handy, you can see how slim the extreme rear of the fuselage was. Looked beautiful but not much meat there.

I saw Il2 in our local Morrison’s the other week for, IIRC, £5.99