Baansportfansite #2

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Velobanjogent #2

Amazing project on the Velobanjogent

The Velocette ROARER : (1939)     
A supercharged twin cylinder racing bike aimed at winning against 
the supercharged contemporary BMW. 

One single prototype was manufactured.     
2 vertical cylinders, 4 stroke, OHV, 2 carburators  
2 parallel contra-rotating crankshafts, geared together 
(a technical layout which will inspire the Model O)  
Cylinder : 497,7 cc  (Bore : 68 mm ; Stroke : 68.25 mm)  
Compression rate : 8.78/1 then 7.5/1  
Boost pressure : 4 psi  
Measured engine power : 54 bhp  
3 plate clutch  
4 ratio gearbox  
shaft driven

I think the new pictures are a replica build but I'm not sure.
Go read the Velobanjogent blog to find out! :)