2 blades pedal propeller

[Hisham]

Dear All

i am about to start building my first wooden pontoon pedal boat

i know that for pedal propulsion, it is more efficient to use 2 blades propeller

i need a supplier for this type of propellers or
a drawings to make it from wood

help plz????

[Rick Willoughby]

Do you know the hull drag at design speed?

Have you decided on a gear ratio?

Have you a preferred cadence?

Do you know how much power you want design for - how many people, how fit, male or female etc?

Easier to make from steel than wood. You should be able to make one in about 6 hours.

If you provide the above information or enough to allow me to work it out I will give you a prop design.

Rick W.