However it differed in having a streamlined central nacelle or fuselage housing the pilot and engine , and the engine itself was a more powerful Green four - cylinder inline type .
Like the others it was also driven by twin pusher propellers .
It differed in having a streamlined central nacelle or fuselage housing the pilot and engine , and the engine itself was a more powerful Green four - cylinder inline type .
Like the others it was also driven by twin pusher propellers .