One motor vs. two motors

[Nevs]

There are realy no arguments against a twin setup ?.

[Fluid]

None in this thread....



.

[StevenBryant]

Twice the cost......


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[Mad Hatter]

Twice the weight......

[Nevs]

Its boring... The boat most likely runs perfect the first time you run it..

[Nevs]

I dont know about the weight and cost.
A TP 5870 cost 296 Eu and weigh 1274 G
2xTP 4070 cost 270 Eu and weigh 1250 G
And aprox. the same power.

[srislash]

My theory always was that you could run two lesser motors to attain the same task as one big motor. Or more in my case these days, you can run two of the same motor and turn bigger props than you could with the one motor

[Nevs]

I imagine a 45-50 inch mono with a tp 5850-70 and 10-12s 1p(2p) 5-8000 mAh..A twin setup with that would be impossible ?.I think you very easily run into "weight-problems" if you try to get more watts out of a twin setup compared to a "Max" single setup.

[srislash]

Well this is a 40” mono with twin TP 4030’s on 8s 44-4800mah 2p. It’s not really fast but I can get 9-10 mins runtime with 442’s.

https://youtu.be/K0opr_YDtI0

I don’t see why something bigger wouldn’t be possible with twin 4050 or 4060’s

[Mad Hatter]

I was told (years ago), by a mercury tech that a single 300 hp outboard can outperform a pair of 200 hp outboards on an an equal boat. I don't know how true this is but it does lose the effect of counter rotation.

[Nevs]

According to this video 2x150 hp outperforms 1x300 hp. Even if the setup would be around 400 pounds heavier.

https://www.youtube.com/watch?v=gG_-YmGN8SY

Single: 49,1 mph
Twin: 50,5 mph
0-30 mph
Single: 5,87 sec
Twin: 5,03 sec.

[rearwheelin]

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

[rearwheelin]

I was told (years ago), by a mercury tech that a single 300 hp outboard can outperform a pair of 200 hp outboards on an an equal boat. I don't know how true this is but it does lose the effect of counter rotation.

Singles outperform threw the turns , that’s it

[rearwheelin]

Twice the cost......


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Not always

[Nevs]

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.