One motor vs. two motors

[srislash]

43” Aeromarine Conquest quad drive , 4 1515’s , 4 T180’s , 4s 4p 20,000mah , 447 left and right props. 17 lbs RTR on 4s, 22 lbs on 6s with 20,000mah.... way more efficient than a large single engine and at the time I built this boat the 4 separate power systems was less money than 10,000 watt single prop setup . The quad was a incredible fun runner to say the least . Running on 4s in this video with half finished 447’s. Much cooler that a single IMHO

Kudos to this. I recall you embarking on this build but don’t recall it finished. Nice. Making me want to build a triple mono, haha.

[RandyatBBY]

I saw it run at the SAW's It was a rocket close to 100MPH if I remember right.

[rearwheelin]

I saw it run at the SAW's It was a rocket close to 100MPH if I remember right.

If you or MarkF spent some testing time with that boat and if it ran proper Lipo’s that day I’m sure it would have toyed with 100 mph !

[rearwheelin]

Hi. Fun boat project with 4 engines.. Im not sure if a single outperforms a twin in turns. In a cat. Yes. in a mono . Yes. If you have outward rotating props. With inward rotating props there might not be any significant difference.. But never tried inward rotation so I do not know.

I tried all the rotations. Each drive cable was the same length for the purpose of testing rotations easily. Even tried thrust vectoring. Had a lot of fun with it for sure.

[rearwheelin]

4 esc’s = 720 amps continuous, 1440 amp burst rate with the original T180’s.. 4 2500 watt motors = 17 hp ... that boat could toy with other boats . I was almost embarrassed to bring it around guys who actually understand the science of FE . I always burned up my large single setups so that’s what motivated me to build the quad . I believe the 4 T180’s was overkill and think 4 120 amp esc’s would be perfect for a 4s quad setup.

[rearwheelin]

Think it’s best to parallel the battery inputs to the esc’s because in the turns the inside prop pulls more amps and will discharge the batteries unevenly when everything is separate

[Nevs]

"Nice. Making me want to build a triple mono, haha."..

Would be hard to do in a deep V. Lets say you used 3x46 mm props. Then the center of the inner / outer props would be about 46 mm from the middle of the boat. Or the same distance you would need between 2x 92 mm props. so it would probably work as a "single+ 2 air props" when running a straight line.
Maybe doable wit 3x outboards or 3x struts with the flex running under the boat for the inner / outer props.

[rearwheelin]

I’d never even attempt a RC Twin mono but if I had money too burn I wouldn’t mind a real one lol