Ruddog RP540 540 Sensored Brushless Motor (17.5T)

The RUDDOG RP540 sensored competition brushless motor was developed using the latest technology in terms of manufacturing and production of competition grade motors. Weighing in at a lightweight 170g the motor is made using highest grade materials including Japan-made steel stator plates and high-temperature 99.9% pure copper wire. Large venting openings improve cooling and provide constant performance over the full run, even in hot conditions. The silver can color looks good on, and off the track.

Specifications:
Weight:165-175g depending on turn count
Voltage:2S/7.4V
Size:540 = 36×51.75mm
Shaft diameter:3.175mm
KV rating:2200 RPM/V
Power:130 Watts
Internal Resistance:0.0514 Ohm
Max. Current:34A
Rotor:￠12.5*￠7.2
Timing:Adjustable from 20 to 60°
Sensor:Standard Sensor Port / exchangeable
EFRA legal:Yes
Includes:

• 17.5T RP540 Motor
• 200m Sensor Lead
• Manual in German and English language

This product was added to our catalog on November 10, 2016

Nitroman Verified Owner Saturday, Aug 5 2017 (about 8 years ago) Ruddog RP540 540 Sensored Brushless Motor (17.5T) Not bad a bad motor for 60 bucks. It isn’t what my schuurspeed 17.5 motors are, but these are good for practice or just bashing imo.
My only complaint is the solder tabs seem flimsy and can move under pressure.
I’ll update this when I get some more time on the motor.
UPDATE: Don’t think this can be beat for the money. It’s 90% of what the high end motors are imo. It’s slightly heavier than the new ultra light motors 10-20 grams. 4 customers found this review helpful. Ken Seratte Verified Owner Sunday, Mar 21 2021 (about 4 years ago) Ruddog RP540 540 Sensored Brushless Motor (17.5T) Standard test with the SkyRC Motor Analyzer:
Max KV @2208, RPM @ 17,890, 1.2A.
Timing Average: 24 degree (27/20/26). Peak 085 dB.
Weight was 173g. Box contained nice foam padding not shown in video.
Limited on track runs, but so far I’ve been pleased with top speed and quickness, with no heating issues. Nice club motor. 2 customers found this review helpful. Doug Moak Verified Owner Sunday, Jul 12 2020 (about 5 years ago) Ruddog RP540 540 Sensored Brushless Motor (17.5T) This is a very fast motor, more than enough for my beginner skill set. I kinda feel I should have bought a 21.5T. The leads are accessible and supported by heat-resistant fiberglass, unlike the melty plastic surrounding the leads on the motor that I never even got to use. 2 customers found this review helpful. Tyler Snider Verified Owner Wednesday, Jul 2 2025 (3 months ago) Ruddog RP540 540 Sensored Brushless Motor (17.5T) Very slow motor. By far the slowest at my local track. Messed with timing and gearing and couldn’t get any performance out of it. View all reviews