Motor size advice

Started by Morkullen
12 replies 16 likes 0 followers Last activity: 8 years ago
#12

Motor size advice

That was also my first thought Martin👍
So Jacko, that means that all of the above applies also to your boat!😊
Happy shopping and boating. Cheers Doug😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
#11

Motor size advice

I do believe that's a Sea Commander, an Aerokits model.

Martin
Liked by jacko
#10

Motor size advice

I to am looking for advice in motor and battery combo for this boat and anybody knows what this is 😊 its 34 inchs long
Liked by Colin H
#9

Motor size advice

No sweat😉 Hope it all works out.
BTW: Canabus got me started on brushless last year. He answered my plea for help upgrading my old Sea Scout. Everything he recommended is now fitted and works a treat, with power in reserve. 😊
All the best, Doug 😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
Liked by suntugs
#7

Motor size advice

Er, that was me 😉. Have fun and don't blow anything up! 😲
Cheers Doug 😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
Liked by suntugs and mturpin013
#6

Motor size advice

Thanks again, Canabus.

Well explained. Hopefully now I can find something that fits the bill.

Best wishes

Morkullen
#5

Motor size advice

Hi Maorkullen,
kv means rpm per volt applied.
Thus the 1100kv motor does 1100rpm / Volt OFF LOAD!
3639: These 4 digit numbers generally mean diameter and length; i.e. 36mm diameter, 39mm length.
xS means the number of cells, of nominal voltage 3.7V for LiPos.
Thus 3S is a 3 cell battery of nominal 11.1V.
25C is a theoretical measure of maximum short term current the battery can deliver in terms of a multiple of it's nominal capacity in Amp hours.
Thus in this case 5.8 x 25A = 137.5A. But not for long!! and afterwards the battery would most likely be wrecked and useless.🤔
So it's really only a marketing gimmick not to be taken very seriously.
Hope this unravels some of the mystery, cheers Doug 😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
Liked by StuartE and suntugs and
#4

Motor size advice

Hello Canabus. Just looked at the motor and battery info you supplied and neither of the specs are available or have been superceded. The problem for me is that I do not understand what all the figures mean. As an old electrical engineer, 1100kv means to me that it is 1100 kilo volts!! I dont think so! Other than being a part number, does 3639 mean anything? Similarly 3S? Lipo 5800mah OK, but 25C? is there a site anywhere which will explain these number to me?

Best regards,

Maorkullen
Liked by suntugs
#3

Motor size advice

Thank you Canabus. I will check it all out.

Many thanks again.

Morkullen
Liked by suntugs
#2

Motor size advice

Hi Morkullen
I suggest a Hobbyking 3639-1100kv 35mm brushless motor with a 60 Amp ESC and a 2 blade 40mm prop.
Battery a 3S Lipo 5800mah 25C will give you more than 1/2 hour.
I had his setup in my 34" Sea commander with very good performance.
Canabus
Liked by suntugs
#1

Motor size advice

I am building the Thornicroft MTB MM337 (again) I last built one many years ago and put a small diesel engine in it at that time.
However, I plan to go all electric R/C on this one and would appreciate advice as to what size, (Make /Model) type of motor could be used. Also which battery pack for the motor. Any and all suggestions would be greatly appreciated.

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