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Mechanical tech This is for the mechanical parts of a model. Gear reductions, Axles, Transmissions, General drive line


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Old 08-16-2015, 12:29 AM
ozy operator ozy operator is offline
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Default motor speedy combo to weight ratio.

Hey all I need some help with motor speedy combo for my knight hauler and stag tippers.

Im sitting on about 13 kgs now rolling and estimate of 15-17kgs finished not loaded.

Was looking at tekin 35 turn hand wound combo roughly$250 australian dollas.

Any feed back on this or any others would be appreciated.

Cheers
Rhys
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Old 08-16-2015, 10:04 AM
rsd53 rsd53 is offline
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Default Re: motor speedy combo to weight ratio.

Quote:
Originally Posted by ozy operator View Post
Hey all I need some help with motor speedy combo for my knight hauler and stag tippers.

Im sitting on about 13 kgs now rolling and estimate of 15-17kgs finished not loaded.

Was looking at tekin 35 turn hand wound combo roughly$250 australian dollas.

Any feed back on this or any others would be appreciated.

Cheers
Rhys
Rhys, spending $250 AUD seems like overkill to me, for an ESC and motor. A little more information would be helpful.

Are you planning on using the stock transmission? ESC's aren't too expensive. I replaced the stock motor in my KH with a 65T ($10). The higher the number of turns the more torque is produced. The catch is as torque increases, speed decreases. It sounds like you are looking for torque. In addition to a higher torque motor, you could install a gear reducer, that can double the torque, but also lowers the speed.

Rob
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Old 08-16-2015, 02:47 PM
ozy operator ozy operator is offline
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Default Re: motor speedy combo to weight ratio.

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Originally Posted by rsd53 View Post
Rhys, spending $250 AUD seems like overkill to me, for an ESC and motor. A little more information would be helpful.

Are you planning on using the stock transmission? ESC's aren't too expensive. I replaced the stock motor in my KH with a 65T ($10). The higher the number of turns the more torque is produced. The catch is as torque increases, speed decreases. It sounds like you are looking for torque. In addition to a higher torque motor, you could install a gear reducer, that can double the torque, but also lowers the speed.

Rob

Thanks for your reply rob

Ok so I would like to stay with stock 3 speed if it will work and can always stay 1st gear for heavy hauling and have the 2 other gears for speed when needed..
The reason for asking as I have a hobbywing motor and speedy in the truck now as its all I had from a drift car now I need torque. If I need a gru I will get one.
even tho its expensive will this combo work can always play with pinion as well.

Cheers
Rhys
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Old 08-16-2015, 03:50 PM
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Dieselchopper Dieselchopper is offline
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Default Re: motor speedy combo to weight ratio.

I am running the stock motor on my winch truck. I added a 4:1 reduction to the drive train. Can easily pull 30 kg of cargo and have had it move 50 kg in testing but was very hard on things( steering servo saver snapped). I feel the reduction in speed is far better money spent than different turn motors. As well the reduction in speed brings trucks to a more realistic scale speed.
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Old 08-16-2015, 04:56 PM
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bigford bigford is offline
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Default Re: motor speedy combo to weight ratio.

i have one 55t two 65t and one 80t motor all working with $10 hobby king esc's
the 80 will be replaced sooner or later as the motor is a pig. there all rc4wd motors
when my last viper esc died i bought the cheap HK esc and have not a problem
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Old 08-16-2015, 07:26 PM
ozy operator ozy operator is offline
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Default Re: motor speedy combo to weight ratio.

Thanks heap for you replies guys and info.
The reason for a more expensive combo is you get what you pay for and have lived by this rule in all my rc adventures.

The steering servo is a bls 251 heli tail servo so its fast and metal geared..over kill I know..

My hk speedy used to run abit warm in my drift car, so running high throttle with gru will have the same results?

So I was thinking 3.1 gru with 35t or 45t combo should get the job done.

Estimate loaded truck will be around 30-40 kgs.

Cheers
Rhys
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