Maximum watts

[sakawinkee]

Newbie! i am buying a mhz 39in hull d/v and is looking at a neu 1521/1y and 1521/1.5y. how many cells will i need and what amperage will i be pulling ? what prop will be adequate? could someone on the forum give me some formulas! i have a x452, and x447 prop. thanks very much.

1521/1y=38v
1521/1.5y=57volts
Esc castle hv 240

[Fluid]

IMO those 1521 motors are too small for a 39" mono and the 1Y has too much Kv anyway. Depending on how fast you want to go and how much you want to spend, a Neu 1527/1Y on 6S would be a better choice on the high end, and a Feigao 580/10L on 6S for a budget setup. Props will be between an x450 and x455. As far as ESCs go the only ones I've seen that work well are the Schulzes and the Hydra 180 HVs; some like the Chinese controllers. Speeds should vary between 50 and 60+ mph depending on the quality of all your components. You could go 8S if you wanted with different motors etc. for a slightly higher cost (mostly cell cost). The Neu is a 2-3 minute setup tops.

The Neu will pull well over 125 amps average, the Feigao probably 80-110 amps. It is not possible to predict the actual amp draw because that depends heavily on how the boat is set up, the size of the pond and how you run it. The quality of the cells makes a big difference too, especially with the Neu.


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[sakawinkee]

IMO those 1521 motors are too small for a 39" mono and the 1Y has too much Kv anyway. Depending on how fast you want to go and how much you want to spend, a Neu 1527/1Y on 6S would be a better choice on the high end, and a Feigao 580/10L on 6S for a budget setup. Props will be between an x450 and x455. As far as ESCs go the only ones I've seen that work well are the Schulzes and the Hydra 180 HVs; some like the Chinese controllers. Speeds should vary between 50 and 60+ mph depending on the quality of all your components. You could go 8S if you wanted with different motors etc. for a slightly higher cost (mostly cell cost). The Neu is a 2-3 minute setup tops.

The Neu will pull well over 125 amps average, the Feigao probably 80-110 amps. It is not possible to predict the actual amp draw because that depends heavily on how the boat is set up, the size of the pond and how you run it. The quality of the cells makes a big difference too, especially with the Neu.


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Hey fluid thanks for the reply. how do you determine the amperage on the Neu motor? what is the formula for amp draw? i know that the 1521 neu is 1750 watts, but don't know how to figure out amperage draw.for my application. could i use 6-8 or 10cells?

[Fluid]

The formula to determine amp draw is A=W/V. But the watt value on the Neu site is just a reference or safe value; believe me those motors can put out a LOT more watts than what is listed on the website! It depends on the voltage, boat, prop, setup, pond, etc.

What I said before was not a joke:

It is not possible to predict the actual amp draw because that depends heavily on how the boat is set up, the size of the pond and how you run it. The quality of the cells makes a big difference too, especially with the Neu.

Same here:

a Neu 1527/1Y on 6S would be a better choice

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[sakawinkee]

The formula to determine amp draw is A=W/V. But the watt value on the Neu site is just a reference or safe value; believe me those motors can put out a LOT more watts than what is listed on the website! It depends on the voltage, boat, prop, setup, pond, etc.

What I said before was not a joke:


Same here:




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Ok 1527/1y- 2250 watts/6cells-22.2v that will theoretically give me 101 amps? but with what size prop? and how much run time on 5000mah pack? am i going in the right direction?

[mmyska]

3 min