Margaret Rose

Margaret Rose is a LMS Princess Royal Class!

Technical Details:
A prototype batch of three locomotives was to be constructed in 1933. Two were constructed as drawn but the third set of frames was retained as the basis for an experimental turbine locomotive.

Turbomotive:
The third prototype was constructed with the aid of the Swedish Ljungstrom turbine company and known asTurbomotive, although not named. It was numbered 6202, in sequence with the Princess Royals. Although 'generally similar' to the rest of the Princess Royals, and 'not all that much different', it used a larger 40 element superheater to give a higher steam temperature, more suitable for turbine use. This boiler was also domeless as would later be used for the second batch of the Princess Royals. The continuous exhaust of the turbine, rather than the sharper intermittent blast of the piston engine, also required changes to the draughting and the use of a double chimney. It entered service in June 1935 on the London–Liverpool service.

Later production:
A second batch of eleven locomotives was constructed later.

VA:
AutumnK