pro boat impulse new power system suggestions

[Piranhafreak]

Hey all im working on a new setup on my impulse as stock was just way to slow i was looking at x445 prop with the leopard 4082 1450kv motor running on 8s how does that sound or does anyone have a better suggestions

[steveo]

maybe a 1250 kv would be good as well how fast do you want to go?

[Piranhafreak]

as fast as i can make it go for about 400 bucks motor and esc

[roadrashracing]

what are you running for batteries?

I found this on another thread, update the speed control and go nuts.

Impulse 31
Stock – 32mph on 4S-45C
Stock – 47mph on 6S-25C
Stock – 47mph on 6S-50C
1.9” Prop – 48mph on 6S-25C (Yes, we know you told us not to try this prop with this setup, and as you warned, we fried the ESC on this setup)

[Piranhafreak]

havent decided on batts yes once i figure on motor and esc then i will decide i know i will be running either 2 3s or 4s in series so 6s or 8s i would like to see 60mph at least. The only problem i have with going 8s is it really limits my choice of esc

right now i think this will be my setup and it changes minute by minute

1 hobbywing 180amp esc
1 castle 10amp bec
1 Leopard 4082 Motor 1450kv
2 ZIPPY Flightmax 5000mAh 3S1P 40C
1 Octura x645 prop

[Mtwinste]

That setup is VERY similar to mine and won't get you guaranteed 60. I was 54-56 yesterday and running pretty dang dry on a finished and balanced prop.

[martin]

On the specs given it calcs out to 57mph so very close to actual runs done. You may have a better chance of 60+ mph with the 4082/2y 1600kv as this setup in the Spartans is into mid 60s mph. I simply wouldnt try the 180amp esc on 8s either youll get smoke, Stick to 6s on thar esc.

[Piranhafreak]

If i were to go 8s i wouldnt use that esc still undecided


still thinking on mabey even selling the impulse 31 and getting a gasser

[svtfrank]

Seems to me like it's gonna start to get pretty heavy with that much battery in it. Got my Leopard 4074 on the way and a few props to test! Can't wait to see what she'll do with double the HP and a little more prop!!!!

[rwhitfield]

Martin-

How did you determine "with the specs given it calcs out to 57mph" if I may ask? I am specing out a Leopard 4074 2150kv 2Y on a Seaking 180 ESC on 4s2p lipo. I was planning to try a x445 or M445 prop. I was guessing that at 3.7*4*2150 I would turn 31,820 rpms.... but have no clue how you can derive a "spec speed" bassed on that!

Do tell!!

And if anyone else wants to tell me that this motor / esc combo is a bad idea then speak up now before I hit the BUY button!!

[TheShaughnessy]

go to the top of the page. there is a tab for the speed calculator, should be able to figure it out from there. also multiply 31820 by .8 to factor in 80% motor efficiency

[c_michael_72]

63mph

I've hit 63mph reliably with the following setup on my Impulse 31:

Leopard 4082 2200kv
Turnigy 180 ESC
Prather s225
Two 3 cell's in series
Steven's upgraded flex shaft (a must)

[rwhitfield]

c_michael_72-

Couple of quick questions:

1) is that the "2Y" 2200 kv Leopard motor? If you (or anyone) can explain the technical variable on that one I would appreciate it, as the 2D, 3D, etc stuff is what I am uninformed about while making potential selections.

2) I would guess that with 4s2p on your set up the Impulse might top out around 50?

3) What kind of run time do you get on your 6s1p batts??? Guessing 6-7 mins tops?

4) Would you mind posting the link to the OSE "upgraded flex shaft"?

Thanks for any help in advance,
RW

4)

[c_michael_72]

1) The 4082 2200KV only comes in a Y wind. I'm not up on the differences between the wind configurations, Steven may be able to help you with that.

2) Your guess sounds about right, but I never ran that configuration so I don't know.

3) I run 2 5000mAh batts and get 4ish minutes, but I have a long lake and do mostly WOT.

4) http://www.offshoreelectrics.com/pro...able-impulse31

[rwhitfield]

Much appreciated c_michael_72!