Is there an ideal drag disk radius size? I would think too big would cause too much drag and too little...would? I need to put them on the Bismarck.
hey so one thing to remember, in addition to the above, is that sometimes the drag props can reveal weaknesses in your drive motors. I had Idaho running on a 2s system with johnson 550 cans and could not for the life of me get enough power to hit 26 seconds. best I could do was 28 til I took off those drag disks, then I could get to 24 seconds with the same throttle setting. I solved this by switching to brushed 3s, which now enables me to do something a tad faster than 12 seconds at that throttle setting. the motors cost 10 bucks each and the new ESCs are the same cost as my old ones. so, like Will says, go with the biggest one you can legally put on the boat (w/o blocking props), and if you have problems hitting speed, then get angrier motors.
I put 2" drag props on there. Hopefully, my motor can push all that through the water. I just put in a new ESC and brushless motor. lol.
dang. on a cruiser. right on, I'm looking forward to seeing this thing accelerate like a rocket with that prop and those drag disks
haha. That was Greg’s 3D printer Tone. He had massive drag props The block the flow of water to the props. But he since fixed it just turned into a nice little boat.
UPDATE: 6/8/2024 So I hit the water with the new drag disks and drive system. The drive system was AMAZING!! The drag disks were just a bit too big. When the bow went down over a wave and props came up close to the surface, I was cavitating real bad. Also, there is now so much thrust that my rudders came lose on the rudder posts. Came home and put 1.75" drag disks on and properly secured the rudders. Outside of that... OH MY GOD. What a difference in maneuverability. I can now fully turn within the ships length at much better speed. Acceleration is crazy good. Overall, incredible improvement in handling today.
