TP Power Motor Definitions

Wanting to order a TP Power 4070 motor to put in my 1/8th sale hydro planning on using
either the 780 KV 6Y or 860 KV 10D motor on 9 cells. Can anyone tell me what the
"6Y & 10D" stand for and what the "advantage" of either motor is over the other.
Will be running this through a Swordfish 240 Amp ESC, tryin to get an average of
25,000 to 28,000 RPM from the 9 cell pack.

Many Thanks for any and all opinions, new to FE and trying to get a good recommendation
of this motor for IMPBA sanctioned races.

Bill D.

Delta and Wye (D and Y) are the way the motors are wired (wound) inside. What matters to performance is the Kv, not the wind which is used. The lower Kv motor will be able to run slightly larger props for higher efficiency in that big hull. If you are racing, check with the club to see which they allow, national rules specify a particular motor.

The D winds perform best with very low ESC timing advance, the Y motors should use 10*-15*.


.

Motor wise to push a 1/8th hull.
A 4070 -- (Watts continuous: 3850 Watts max: 7500) may be a little small and easily over powered.

You may want to look at the 5670 -- Watts continuous: 6,500W
9S under load is about 36Volts X about a 185A = 6,600 Watts

This would keep you in a very safe range on the motor.

Larry

Quote:

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Originally Posted by TRUCKPULL

Motor wise to push a 1/8th hull.
A 4070 -- (Watts continuous: 3850 Watts max: 7500) may be a little small and easily over powered.

You may want to look at the 5670 -- Watts continuous: 6,500W
9S under load is about 36Volts X about a 185A = 6,600 Watts

This would keep you in a very safe range on the motor.

Larry

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Gotta disagree about the 5670 vs 4070. The 56 motor is a big motor and fit could be tight depending on the hull. The 4070 motor is similar in size to a NEU 1527 which has for years been a good standard in 1/8's. The 4070 IMO is sufficient for a 1/8 scale, size, power and weight wise. Your assumed wattage figures equates to nearly 9hp gas equivalent! You can run at 100 amps and still be close to 5hp which is plenty for to make a 1/8 hull perform well.

This size motor has been used very successfully for years in NAMBA 1/8 scale racing with great results. The currently specified motors have Kv values very close to 850 rpm.

And yes, fitting the larger-format motor in many 1/8 scale hulls would be a challenge. Realize that few want to run their highly detailed scale model at 70 mph - a blow-over at that speed is more likely and damage to scale parts like wings, mirrors, Allison motors etc. would be costly. Speeds in the 50s are still fun, more scale-like and safer. Those who want more speed have sport hydro hulls to run.


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The TP Power 4070 is one of new suggested motors being allowed in the 1/8th scale class,
although no specific KV is mentioned in the bulletin that was recently put out Mike Ball the
National Fast Electric Director.