[Guest]

That is correct, the 3-blade variable pitch metal prop did gave much more flexible performance across the entire speed range.

But in the case of Hawker Hurricane, the early version - two-blade fixed pitch wooden prop, canvass wings, Merlin II and all, had a higher top speed - by about 2 mph - than the later Rotol metal prop, metal wings, Merlin III Hurricane.

This loss of speed was mainly due to increase in weight of the newer Hurricane (some 33kg of armor plating, IFF equipment, among other things added) but due to the more efficient propeller this variant climbed better and accelerated faster than the old one.

This is well covered in books and other sources about the Hurricane and i'm surprised you never heard of this before.

thanks for info but

I did not create the topic to discuss the propellers or speed for the hurricane.
but to discuss about something much more important, which is the existence of a single flight model.