Blenheim use 2 stage propellers?

[Buzpilot]

Originally Posted by JG53Frankyboy

Two speed propellers are historical correct for the Mk.IV!
Mk.V had CSP IIRC...

Several sources indikate your wrong, do you have documents where it's stated?

The Bristol Blenheim was a British light bomber aircraft designed and built by the Bristol Aeroplane Company that was used extensively in the early days of the Second World War. It was adapted as an interim long-range and night fighter, pending the availability of the Beaufighter. It was one of the first British aircraft to have all-metal stressed-skin construction, to utilise retractable landing gear, flaps, powered gun turret and variable pitch propellers. A Canadian-built variant named the Bolingbroke was used as an anti-submarine and training aircraft.

From Bristol Blenheim in action;

The transition from biplane bombers with fixed undercarriage, fixed pitch propellers, and no flaps to the Blenheim with its retractable undercarriage, variable pitch propellers and flaps invitably led to problems...

And even a Blenheim PR Mk.I (L1348 ), prototype, was fitted with Rotol constant speed propellers, instead of DH-Hamilton propellers.