Paddles and baffled channels

Question 1

Drag force in paddles

Answer 1

Fd=0.5CdrawAvsquare
where Cd is drag coefficient
and v is relative velocity

Question 2

Drag coefficient Cd

Answer 2

if the L/w ratioof the paddle is between
0to5 Cd=1.2
5to20 Cd=1.5
20 to inf Cd=1.9

Question 3

Power needed in paddles

Answer 3

Fdv
implies
0.5CdrawA*vcube