Model Boat Mayhem

Technical, Techniques, Hints, and Tips => BRUSHLESS Motors and Speed Controllers => Topic started by: woodley miniman on June 12, 2013, 10:50:03 am

Title: Can I use this in a boat
Post by: woodley miniman on June 12, 2013, 10:50:03 am

Hi all, I'm still loking for a bushless motor to put into my new boat....can I use this one? I want to use 6 cell li-po
 
http://www.hobbyking.co.uk/hobbyking/store/__14740__Turnigy_L3040A_480G_Brushless_Motor.html (http://www.hobbyking.co.uk/hobbyking/store/__14740__Turnigy_L3040A_480G_Brushless_Motor.html)

Turnigy L3040A-480G Brushless Motor
PRODUCT ID: L3040A-480G
 
Specifications:
Dimension: 38mm x 46mm
Weight: 194g
Kv: 480rpm/V
Voltage: 22.2v (6s)
Max Power: 1000w
Max Current: 52A
No load Current: 0.8A
Diameter of shaft: 5mm
Thrust: 2100g
ESC: 60A~80A
 
Kv (rpm/v)    480
Weight (g)    194
Max Current (A)    52
Resistance (mh)    0
Max Voltage (V)    22
Power(W)    1000
Shaft A (mm)    5
Length B (mm)    46
Diameter C (mm)    38
Can Length D (mm)    30
Total Length E (mm)    65

Title: Re: Can I use this in a boat
Post by: sparkey on June 12, 2013, 10:55:45 am

 %% Yes you can but made sure you have a 120amp esc (chinese amps) %% %%

Title: Re: Can I use this in a boat
Post by: essex2visuvesi on June 12, 2013, 11:03:52 am

yes you can, but it depends on the boat you are planning on fitting it to. I have a similar sized motor (4240 and slightly higher KV) in my 34"huntsman and a Im using a 200a(Chinese) esc in mine


http://www.modelboatmayhem.co.uk/forum/index.php/topic,36813.0.html (http://www.modelboatmayhem.co.uk/forum/index.php/topic,36813.0.html)


Also water cooling is a must.... the water cooled front mount I have works well

Title: Re: Can I use this in a boat
Post by: woodley miniman on June 12, 2013, 11:24:15 am

Sorry, forgot to say that I'm want the motor for...I want toput it in a Robbe Lightning 46 I already have 6s lipo that I use on my T rex 500 so I want touse the batteries on the boat too  :-))   

   (http://thumbs.ebaystatic.com/d/l180/pict/190835786287_1.jpg)   Robbe Lightning 46 Radio Controlled Boat (http://www.ebay.co.uk/itm/190835786287?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649)

Title: Re: Can I use this in a boat
Post by: essex2visuvesi on June 12, 2013, 11:53:12 am

not sure if an outrunner is really the best option for that boat..... I'm sure someone with more knowledge than me will step in
By the way the 6s lipos I use came from the same place (Trex 500)

Title: Re: Can I use this in a boat
Post by: Mad_Mike on June 12, 2013, 06:02:31 pm

depends on what kind of propeller your using. Surface peircing or submerged? Either way the kv on that motor is very low to low for fast boat surface or sub surface drive. Looks ideal for a tug boat actually. Need more info omn what you plan to do.

Title: Re: Can I use this in a boat
Post by: woodley miniman on June 13, 2013, 08:00:37 am

Hi Guys, This is what I want to do to the Robbe Lightening 46................I want to remove the old brushed 600 motor that is fitted to the boat at the moment. I want to use my 6s lipo batteries I have and fit a motor/esc to the boat that will make it go like a bat out of hell!!!!! has cheap as possible  :}  I thought with brushless motors the lower the kv the faster it would run????

Title: Re: Can I use this in a boat
Post by: nick_75au on June 13, 2013, 08:38:09 am

480 X 22.2 volts is 10000 RPM pretty good for a 50-55 mm sub surface prop. Kv is RPM per volt so low Kv motors use higher voltage to achieve a similar RPM. Ie a higher Kv motor will be faster on the same voltage. For the same RPM a low Kv high volt motor will draw lower amps than a high Kv low voltage with the same RPM. 


I put that exact motor in a wooden Riva Corsero (Vietnam type mahogany boat) on 6 cell with a 80 amp ESC and a 48 mm high pitch racing 3 blade prop, couldn't go over 3/4 throttle without the boat becoming wild so down sized the prop to a 45 mm 2 blade. A picture of my set-up may appear in an article by a MBM member showing how its water cooled, though with the smaller prop the watercooling is un-necessary.


Cheers
Nick