A brief look at the BMW Rennsport engine from items in my archive...no particular theme, perhaps you could even say a sort of po-pourri of interesting photos......

The BMW Rennsport or more commonly titled RS engine has been around since the 1930's in various forms and perhaps it's greatest achievement was the victory in the 1939 Senior IOM TT, the motorcycle ridden by Georg Meier.

 Photo taken by me at Krauser's in Gemmering by Munich in May 1974.
The machine came from the BMW museum in Munich and was claimed to be the TT winning engine, but evidence indicates it was more likely Jock West's machine.
Jock West the English rider, later sales manager at AMC motorcycles associated with the racing team first rode for BMW in 1937...

Interesting the two photos titled for the 1937 Senior IOM TT with Jock West and both have different frame configurations...one a rigid rear end, the other with a plunger rear suspension.

1954 Ulster GP...French Algerian Flahaut's RS....

1956 Ulster GP, Walter Zeller's RS

Walter Zeller in the Paddock at the 1956 Ulster GP.

Above three photos courtesy of Barry Sewell....

Walter Zeller, RS BMW....

Australian Jack Forrest wins the 1956 Senior TT at the Easter races at Bathurst, NSW

He then took the Australian land speed record for motorcycles in September 1957  with the same machine...

 Dickie Dale obtains the ex Jack Forrest Rennsport...owned by Doug Fugger.

    

 A Rennsport engine on test at Krauser's in Gemmering by Munich, April 1974...photos taken by the Velobanjogent...

Photo taken by the Velobanjogent of the complete machine from the BMW museum in Munich, at Krauser's in Gemmering by Munich, April 1974.