differences in merllins

Discussion in 'Engines' started by mike siggins, Dec 27, 2012.

  1. mike siggins

    mike siggins Member

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    what was the differnce between a 45 and 50 motor and was there more models after the 50
     
  2. Aozora

    Aozora Well-Known Member

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    #2 Aozora, Dec 27, 2012
    Last edited: Dec 27, 2012
    From memory, one of the major differences between the 45 and 50 was that the 45 series was fitted with a float carburettor (carburetor in American) whereas the 50 series used an injection carby, plus the 50s were reinforced internally - but there are probably others who know more than I do. Of course there were later Merlins, starting with the 60 series which used two-stage, two-speed superchargers: the Merlin 61 used in a Spitfire VC airframe became the Spitfire Mk IX, which brought Spitfire performance up to near parity with the Focke-Wulf Fw 190A. A good primer on later Merlins, written by Rolls-Royce's chief engineer can be found Here
     
  3. tomo pauk

    tomo pauk Creator of Interesting Threads

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    The Merlin 30 series might be considered as the heirs to the Merlin 50, ie. single-speed, single stage 'branch' of the Merlin? The two speed, single stage versions (Merlin 20 series; despite the number, those are 'better' than single-speed versions) went their way, while Merlin 60 series were two-stage versions.

    Here is about the M 45 -> M 50 relations:

    MERLIN DATA.jpg
     
  4. wuzak

    wuzak Well-Known Member

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    Some Merlin 30 series were single speed, and some 2 speed.

    30 was single speed
    31 2 speed
    32 single speed
    33 2 speed
    34 2 speed
    35 single speed
    38 2 speed (Packard built Merlin 22)

    Lumsden has the following 40 50 series engines
    45
    45M (cropped supercharger)
    46
    47
    50
    50A
    50M (cropped supercharger)
    55
    55A
    55M (cropped supercharger)
    55MA (cropped supercharger, 2 piece blocks)
    56

    All engines 60 and above were two stage units.
     
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