set-up for a counter rotating surface drive on a twin

[shifter]

This is a tough one.

We are looking at a twin installation with our new drive.

Now for the combination of the blackhawk/inboard or outboard combo thread with a little twist.

What will be faster, better handling, ect...

1) front props spinning inboard, rear props outboard

2) front props spinning outboard, rear props spinning inboard.

3) different ratio front and rear with different pitch to match speed or same ratio/pitch

4) # of blades front/rear 3x3 4x4 5x5 6x6 7x7 3x4 3x5 6x3

5) diameter


pat W