sorexy

Which ESC for tamiya supershot with Technipower or Technigold

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Hi all,

I'm just aft some educated advice on what Esc would be suitable for a Technipower or Technigold motor? I have read that motors with timing have the ability to ruin an esc. Is this correct or am I being led up the garden path?

I have almost finished rebuilding a supershot and would love to use the original Technipower with the better performance of an esc.

I have only just got back into rc after 20 years, so I'm not all that educated on the current technology, so lamens terms would be appreciated

Cheers

Brett

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Technipower isn't that powerful, I think it's only something like 23 Turns, so most any speed control can handle that. It should have similar current draw to a Sport Tuned.

As long as you make sure to service the motor, clean the comm and brush assembly a bit, then you should be good.

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Those motors were designed when 1200mah was the max pack size. None of them are going to pull much power. I wouldn't hesitate to run with a 101BK ESC (tamiya cheapo). If the motor is in good shape, it should run fine.

I run my 101BK with a 23T RZ motor. While it does thermal during tarmac-racing with slicks (in a hotshot chassis), I have no problems with it when I'm just bashing around in dirt. I'm sure this motor could put the hurt on the ancient Technigold.

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23T RZ motor...I'm sure this motor could put the hurt on the ancient Technigold.
Motor: RX-540SD Technipower

Usable voltage: 6 - 8.4v

Torque at best efficiency: 315g-cm (7.2v)

R.P.M. at best efficiency: 20,300rpm

Current drain at best efficiency: 11.2A (7.2v)

Best efficiency: 79% (7.2v)

Turns: 23 single

Notes: Supershot

Motor: RS-540 Sport-Tuned

Year: 1990

Usable voltage: 6 - 8.4v

Torque at best efficiency: 350g-cm

R.P.M. at best efficiency: 18,300rpm (7.2v)

Current drain at best efficiency: 12A (7.2v)

Best efficiency: 74% (7.2v)

Turns: 27 single - 0.65mm (USA/Asia), 23 single - 0.8mm (Europe)

Motor: Technigold

Year: 1986

Usable voltage: 7.2v - 8.4v

Torque at best efficiency: 430g-cm (7.2v)

R.P.M. at best efficiency: 19,000rpm

Current drain at best efficiency: 14A (7.2v)

Best efficiency: 81% (7.2v)

Turns: 21 single - 0.8mm

Motor: Super Stock Motor Type RZ

Year: 2004

Usable voltage: 7.2v

Torque at best efficiency: 500 g-cm (7.2v)

R.P.M. at no load: 27,500 rpm (7.2v)

R.P.M. at best efficiency: 23,000 rpm (7.2v)

Current drain at best efficiency: ?

Best efficiency: 76%

Turns: 23

So you see, the Technipower has a bit more RPM than the sport tuned, but has less torque and less Amps drawn. It should be fine for the TEU101BK.

Then you have the comparison of the Technigold and the RZ.

Clearly the RZ wins hands down, more RPM, more Torque.

However, as it is plain to see, the Technigold and similar motors have very high efficiency, around the 80% area.

Compare that to a regular 540 silvercan, which is only 69%, and in cases of modified motors it may be very low:

Motor: Acto-Power Off Roader

Year: 1992

Usable voltage: 7.2 - 8.4v

Torque at best efficiency: 450g-cm (7.2v)

R.P.M. at best efficiency: 25,800rpm (7.2v)

Current drain at best efficiency: 30A (7.2v)

Best efficiency: 54% (7.2v)

Turns: 14 double - 0.7mm

As you can see, the acto power offroader only had 54% efficiency. This means it will create lots of heat and waste lots of energy.

The technigold, techipower and similar, will not make so much heat and will use most of the energy to create RPMS.

Hence you will get REALLY long runtimes if you use these motors.

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I've used a 15T motor and 8,4V battery pack with an rather heavy Carson 4WD "Desert Quad". ESC was an unmodified Tamiya 104BK. It didn't even get hot during some hot sunny days. So you shouldn't worry. ;)

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