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Basically (at the grossest level) it's a trade-off between
power and running time, the "stock" motors being the longest
runners and "drag" motors (yes, they drag race these things)
being the shortest.
Rating motors as "4 minute motors" is kind of a relative
thing. Actual running time depends on the obvious things,
gearing, friction, speed controller.......but, generally,
I've seen motors perform as advertised on asphalt and
carpet. If you run in sand it's a whole different story.
This is only part of the story. The next thing to consider
is the power and torque characteristics. This is not unlike
"real" power plants. Depending on the type of wire (gauge,
number of strands), the number of turns, and the timing,
the motors can have alot of low end with a broad power
curve or can be very peaky.
Sometimes this is important. In 1/12 road racing it is far
more important to have a "drive-able" motor than it is to
have the most horsepower. In large oval-type racing (of the
3 minute variety) peak power at the top end is the way to
go, so you'll see motors sold as "oval" motors.
So if you're off-roading, get a "modified" or "sprint" motor
from a good company (Reedy, Trinity, Kyosho, Tamiya, Cam,
Checkpoint, Rev-tech, Losi....I'm sure I left out some good
ones) or do what everyone else does....go to the races and see
what's winning.
Chris
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Ref .8
Most of this reply is correct - except that the stock RS-540
motors are identical. The reversing is accomplished via the
wiring harness at the Power/Economy switch. So any motor can
be utilized in this truck with the standard wiring harness.
For those using an electronic speed control (which elminates
the stock harness) and are unwilling to make their own cable
harness or unwilling to see a motor running in a non-standard
direction, Trinity now markets a "set" of motors specific for
the Clodbuster which indeed, has a reverse wound front motor
and a standard wound motor for the rear.
As a side note of interest, the apparantly "top of the line"
highest-torque motor for the Clodbuster is the new Turbo -05
motor. This is a direct replacement "bolt-on" for all 540/05
stock motors. List is $79.00. If matched with an 8-tooth
pinion, the truck is appparantly capable of pulling 100+ lbs!
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| Can someone enlighten me about the relationship of the number of
wires (referred to as "winds") to motor performance? What should
I expect the difference to be between say a 14 turn single wind
and a 14 turn quad wind motor? The impression I get is that fewer
winds (with the same number of turns) produce more torque (high
end? - low end?), but at what expense?
It would also be interesting to know what kind of run times people
are getting with various motor - battery (SC, SCR, SCE) - vehicle
weight combinations.
We have Trinity Monster Mash motors (16 turn, single) in both a
Monster Beetle (14 tooth pinion) and Big Boss (19 tooth pinion),
using both 6 and 7 cell SC packs. The MB easily runs 3 minutes (on
road), the BB just makes it with that combination.
Tony
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