We have an engine that will make 250 HP.
Target speed for an RV4 is 225 MPH.
We intend to race this airplane.

We think a 4 blade Warp Drive will absorb the HP.
What is the maximum twist angle change you can obtain
by tapering the blades. I know the twist is less then
theoretically ideal. We are willing to accept that
as the features of ground adjustable and carbon construction
make the Warp Drive unique and better in the field of props.
IMHO that outweighs the less than ideal theoretical twist
distribution.

I know you lose blade area as the twist is increased and
the tip cord is reduced. What taper do you recommend?

I would like to see a twist angle plot verses the blade
radius for the taper you recommend.

This I think is ideal theoretical twist distribution for 231 MPH.
Radius in feet.
----------------------------------------------------
MPH = 231.8
Radius   Circ MPH   Cord MPH    0 Angle of Attack
0.3         48.2        236.8      78.26
0.5         96.4        251.1      67.42
0.8        144.6        273.2      58.05
1.0        192.8        301.5      50.25
1.3        241.0        334.4      43.89
1.5        289.2        370.6      38.72
1.8        337.4        409.3      34.50
2.0        385.6        449.9      31.02
2.3        433.8        491.8      28.12
2.5        481.9        534.8      25.69
2.8        530.1        578.6      23.62
3.0        578.3        623.1      21.84

Twist = 56.41    Ratio Twist/Root = 0.72    Ratio Twist/Tip = 2.58
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Paul Lamar