KDE DIRECT 1917H/1Y-N42 S2 HP BRUSHLESS MOTOR
FOR 700-CLASS ELECTRIC HELICOPTER SERIES

Item Number: KDE1917H-N42

Material: Neodymium N42 Core, 520kV
Models: direct bolt-in design for the ALIGN TREX 700E and KDE Direct TREX 700N E-Conversion Kits
(M4 x 30mm).  Also suitable for other high-voltage, 700-class helicopters and 600-class setups with
appropriate gearing (compatible with M4 x 30mm and M3 x 25mm mounting profiles).

Recommended Accessories:
REVCO MOD 1.0 HARDENED PINION GEAR, 6MM BORE
TREX 700 SERIES MAIN DRIVE GEAR, 115T, MOD1.0
TREX 700N E-CONVERSION ELECTRONIC PINION SUPPORT (M4 x 30mm)
TREX 700N E-CONVERSION MOTOR MOUNT UPGRADE (M4 x 30mm)

ReadyHeli.com Video Review:  YOUTUBE
Kyle Stacy Performance Flight Videos:  YOUTUBE - FLIGHT 1 or YOUTUBE - FLIGHT 2

Update: the threaded hole pattern for the latest production series of motors (termed "S2") has been modified to increase
the compatibility of the motor with the ALIGN TREX 700E and other series of High-Voltage, 90-class electric helicopters.  
The following hole patterns are:

S2: M4 x 30mm, M3 x 25mm (dual pattern)
S1: M4 x 25mm (dual pattern)

Note: the new KDE Direct 1917H/1Y-N42 S2 High-Performance Brushless Motor is an extremely efficient and powerful
motor for any 700-sized Electronic helicopter, and was designed as a drop-in powerhouse for the KDE Direct ALIGN TREX
700N E-Conversion components and is now leading the way in 90-class brushless motor developments (perfectly suited
for the TREX 700E).  In collaboration with Neumotors, the motor is custom designed for KDE Direct and has an updated
N42 magnet core, extremely low resistance windings, extended 41mm pinion shaft, easily replaceable bearings, and other
upgrades to make it extremely unique and powerful for sport and hard-3D flight.  The motor is designed to handle
extreme-power setups and has been optimized for governor-control algorithms of common ESCs on the market; making
this motor the most capable offering in the RC helicopter marketplace.















































Finish:
Black anodized CNC housing, clear anodized CNC shroud and fan components
Mount Pattern
M4 x 30mm, M3 x 25mm
Shaft Diameter
6 mm
Shaft Length
41 mm
Motor Diameter
50 mm (56 mm Shroud)
Motor Length
83 mm
Motor Weight
530 g
Cooling System
High-Volume Fan and Fins
ESC PWM Rate
11-16 kHz
HIGH PERFORMANCE
FLIGHT VIDEO AND DATA
LOG GRAPH - 12HP+
YOUTUBE
DATA GRAPH LINK
kV
520 rpm/V
Maximum Power
8,500+ W
Maximum Efficiency
93%
Maximum Voltage
63 V (15S)
Io (@10V)
2.2 A
Rm (Winding Resistance)
0.013 Ω
Maximum Speed
35,000 rpm
Rotor Poles
8 (24 Pole Stator)
Bearings
F626ZZ (NSK)
PROGRAM DISCONTINUED