840M-4T ASTRO 40 BRUSHLESS MOTOR

840M-4T ASTRO 40 BRUSHLESS MOTOR

$202.18

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• Power of a 40 Glow Motor, over 1,000 watts.
• Spins 10 inch APC Prop at 12,000 Rpm on 4 cells.
• Small size only 1.3 inches dia. and 2.5 inches long
• Robust and lightweight, only 8.7 ounces (250 grams).
• Powerful four pole SMCO rotor will never demag.
• Special 12 slot stator for smooth running and high torque.
• Silicon steel laminations for highest efficiency
• Runs on three to five Lithium Polymer cells.
• Can handle up to 45 Amps current draw.
• Requires 45 amp high voltage sensorless control.
• Perfect for 6 to 10 pound sport scale models.
• Always Handcrafted in Irvine, California U.S.A.

 

Winding
4 turns, #17
Speed Constant Kv
1360 rpm/volt
Resistance
43 milliohms
No Load Current
1,200 ma
Rotor Magnets
Sm Cobalt
Bearings
Ball Bearings
Motor Diameter
1.35 inches
Motor Length
2.50 inches
Motor Weight
8.7 ounces
Motor Shaft Diameter
5 mm dia
Torque Constant Kt
1 in-oz/Amp
Best Efficiency @ 18.5V
90% @ 25 Amps
Max Continuous Amps
45 Amps
Maximum Amps 30 sec Burst
60 Amps
Maximum Power 1000 watts

 

For an explanation of motor terminology and parameters, please click here.

 

Warranty

Astro Flight, Inc. warrants all products against defects in material and workmanship for a period of 90 days, from the date of purchase. During the warranty period, Astro Flight will repair or replace the product. This warranty does not apply if the product has been damaged by accident, abuse, misuse or misapplication, nor as a result of service or modification made by others. Astro Flight is not responsible for incidental or consequential damages resulting from the use of this product. This includes damages to intellectual information, property and personal injury. Astro Flight reserves the right to make changes in future product design, without reservation and without notification to its users.

Returns

Please contact the Customer Support Department to obtain a Return Merchandise Authorization (RMA) number, before shipping the product back to Astro Flight. Returns will not be accepted without a valid RMA number. For faster service, please have the following information on hand when calling or emailing for an RMA number: customer name, invoice number and reason for return. Shipping charges on returned items are the customer's responsibility. Products should be returned with shipping charges prepaid, along with proof of purchase, a description of the problem and the issued RMA number. All returned products are subject to a 15% restocking fee.

 

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840M-4T ASTRO 40 BRUSHLESS MOTOR

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