Europa-List: 2-blade props

[Fergus Kyle <VE3LVO@rac.ca>]

I think the number of blades in our types of machines is mainly ethereal
because the power range is so small.
The Spit began with 700horse had two wood blades, the -5 had 3, the -6 had 4
and eventually a copy came out with 10 (two contra-rotating 5's) - al to
accommodate larger more powerful engines. I think later models had 3 times
the prototype's poop.
        That's why I opted for 3 - I liked the look.
Ferg