NEW Pro Boat Impluse 31 RTR V2

[hobby_man]

chart

http://forums.offshoreelectrics.com/...2&d=1288301845

[mannytx1]

impulse 31 v2 appropriate set-up max 5S

100_0181.jpgmotor 1800kv max 5S=18.5v - 21v 33,300rpm - 37,800rpm
propx442

NO 6S

[Niky]

Hi Guys,
so finally, it's exact what the guys saying at forum:
that 1800kv motor is not compatible with 6s,(should be 1600kv), but why the Proboat gives the combination of 1800kv motor & 80A ESC compatible on 6s???
Thanks,salute all Niky.

[mannytx1]

recommended for brushless motor max 40000rpm
100_0185.jpg
4s motor 2200kv 4s=4.2vx4=16.8 16.8x2200=36960rpm
5s motor 1800kv 5s=4.2vx5=21v 21x1800=37800rpm
6s motor 1500kv 6s=4.2vx6=25.2v 25.2x1500=37800rpm

motor A3630 imp volt 12-22.2v 50A 4S-5S
motor dynm3830 ???????
max rpm ?????????

[dana]

recommended for brushless motor max 40000rpm
[ATTACH=CONFIG]86890[/ATTACH]
4s motor 2200kv 4s=4.2vx4=16.8 16.8x2200=36960rpm
5s motor 1800kv 5s=4.2vx5=21v 21x1800=37800rpm
6s motor 1500kv 6s=4.2vx6=25.2v 25.2x1500=37800rpm


motor A3630 imp volt 12-22.2v 50A 4S-5S
motor dynm3830 ???????
max rpm ?????????

Not quite how it works. Multiply by 3.7v not 4.2

[mannytx1]

No DANA Multiply by 4.2v max voltage100_0182.jpg
battery / nominal voltage / maximum charge voltage / minimum discharge voltage
1S / 3.7v / 4.2v / 3.2v
2S / 7.4v / 8.4v / 6.4v
3S / 11.1v / 12.6v / 9.6v
4S / 14.8v / 16.8v / 12.8v
5S / 18.5v / 21.0v / 16.0v
6S / 22.2v / 25.2v / 19.2v

[dana]

I see what you mean, but still not quite rite. Do not multiply by 4.2

[Darin Jordan]

You are both "right"... 3.7 is nominal... 4.2 is optimum... However, there are almost NO, if any, cells that will be 4.2V under any load at all...

You are better to figure out your setups using 3.7 or 3.8V/cell, and calculate from there. And that would be for GOOD cells... VERY good cells might.... MIGHT, hold 3.9 or 4.0V/cell for a very short period of time at the beginning of the discharge cycle (first 20-30 seconds), but even that is a push...

I do all my "guestimation" using 3.7V/Cell...

[dana]

Thanks darrin, i was feeling too lazy to explain that lol

[mannytx1]

D-curve2.jpg
Each cell of a LiPo has a nominal voltage rating of 3,7 Volt and a maximum charge voltage of 4,22 Volt (4,2V is standard).

That means the LiPo is used in a "voltage-window" ranging between 3Volt and 4,2Volt.

In contrary to a normal accumulator the voltage of the LiPo cells will not sink below 3 Volt !.

If a cell is discharged below 3 Volt, this will cause irreparable damages. Afterwards a complete charging is not possible and its shelf life is very short.

[dana]

[ATTACH=CONFIG]0[/ATTACH]
Each cell of a LiPo has a nominal voltage rating of 3,7 Volt and a maximum charge voltage of 4,22 Volt (4,2V is standard).

That means the LiPo is used in a "voltage-window" ranging between 3Volt and 4,2Volt.

In contrary to a normal accumulator the voltage of the LiPo cells will not sink below 3 Volt !.

If a cell is discharged below 3 Volt, this will cause irreparable damages. Afterwards a complete charging is not possible and its shelf life is very short.

okay… so the point here is?
you still multiply by 3.7 to figure your rpm's

[Darin Jordan]

okay… so the point here is?

I'm wondering the same thing... Am I being told that all these years I've been doing it wrong??

[dana]

I'm wondering the same thing... Am I being told that all these years I've been doing it wrong??

apparently the other 99.9% of us here have been too darin… dont feel bad

[mannytx1]

DARIN JORDAN
How many ships burn per year?

[dana]

DARIN JORDAN
How many ships burn per year?

well darrin? lol… what is going on here manny….?