Designs For Motorized Toy Boat What Is The Ideal Design For A Motorised Propeller, Going Both Forwards & Reverse?

What is the ideal design for a motorised propeller, going both forwards & reverse? - designs for motorized toy boat

I see a plastic propeller (for competition), which is operated on a small electric motor. You do not know how many leaves attatched, what will be measuring the diameter of Realations car toy that is the width and angle attatched as I am.

The design should be the maximum thrust of the propeller and drive (forward and then suddenly, then again) transfer, a short distance of 1-3 meters.

Additionally, the size of the propeller is relatively small (large enough to be able to hold in their hands, perhaps?).

What is the best model, the car that has gone farthest drive attatched with the least resistance, the fastest in both directions and with limited power?

If you have thatERIE, to my question, I know =]
Thank you!