E85S4

Why does thunder power not list kv ratings or suggested voltages? Looking for a spec on the Z3R 550 4 turn. Has anyone done some independent research?

ThunderPowerRC

Because Kv numbers for slotted sensor motors are subjective. Stator design, rotor type and strength, motor timing all effect Kv. Most numbers are made up. This is why we don’t publish numbers. However if you must.

Thunder Power Z3R 550 Motors
4.0 4.5 5.0 5.5
Part Number TPM-550A040 TPM-550A045 TPM-550A050 TPM55A055
Voltage 7.4 7.4 7.4-11.1 7.4-11.1
RPM/7.4V 37814 33596 30340 27602
kV 5110 4540 4100 3730
Power (W) 950 900 850 800
Max Current (A) 133 126 120 110
Efficiency (%) 92 92 94 94
Diameter (mm) 35.8 35.8 35.8 35.8
Length (mm) 65.3 65.3 65.3 65.3
Shaft Diameter (mm) 5.0 5.0 5.0 5.0
Weight (g) 248 248 248 248

defcone

iTrader: (15)

Will a 4.5t stator fit in a 13.5t can?

Jerz616

iTrader: (49)

I don't think so. 13.5 is still considered stock spec. The 4.5 being a mod. You can interchange stock stators with other stock cans, but not with mod cans.

Steve S

iTrader: (5)

All the stators are interchangeable.

Jerz616

iTrader: (49)

I think you might want to check that out. Stock stators are interchangeable with other stock stators. Mod stators are interchangeable with other mod stators. But you can't mix the 2.

This from page 17 post #249

Let me try to explain, winds 7.5t to 21.5t have a shorter stator than the modified 3.5 to 6.6t motors. There are two different cans for the motors. One for stock and one for mod. So the short answer is a mod stator will not fit in a stock can. We only offer the stock can as a replacement at this time. There willbe new mod cans coming soon

mwoods

Wat rotor comes with the 17.5 motor? Is it the red or the green one?

Thanks

defcone

iTrader: (15)

Red

mwoods

Thanks ill try the green one soon .

Steve S

iTrader: (5)

Ok, that makes sense. So really the compatibility is not with 'mod' and 'stock', but with specific winds. The info I got from ThunderPower by email was that my 10.5 (stock) stator would work in an 8.5 (mod) can, so I assumed that mod and stock stators were interchangeable.

defcone

iTrader: (15)

Maybe 10.5 is mod?

NOFX

iTrader: (25)

Does that make 8.5 = stock?

Steve S

iTrader: (5)

I was going by their own designation:
http://thunderpowerrc.com/Z3RBrushlessMotors.htm

Nathan Wilson

Does anyone have a guide or video of how to disassemble / assemble the motors.

Should you aim to remove all play from the shaft?

Thanks

Jerz616

iTrader: (49)

Just remove the 3 screws and pull the red and silver can halves apart. The stator will be left with the rotor inside. Pull the rotor out. I would just shim it so thst it floats freely. You don't want it to bind. Just enough side to side play. Usually a couple mm of play is good.