Hardware update - continously looking to make the little things even better, Cobra motors from Rotorgeeks now include a supplemental hardware bag containing (4) Hex head M3x5 stainless steel motor mount screws and (1) standard prop nut. We like the sure grip of hex head screws over Philips 'star' head and prefer using the standard nut for standard rotating props as it's easier to remove and locknuts are typically only needed on the reverse rotation. As with all of our little improvements, customers who previously purchased Cobra motors can request them free on their next order.
Cobra Brushless Motors offer performance and value for Sport Flyers and Competition pilots alike. They are built from high quality components, and are designed to give years of top-level performance. All Cobra Motors are shipped in a custom designed package that features protective foam on all sides, with separate compartments to protect the motor and accessory pack.
The Cobra 2204 series motors have a 3.0mm shaft for extra strength, as well as oversize bearings to support the shaft and provide a long life. The stators are made with 0.20mm laminations for maximum efficiency and minimum Eddy Current losses. Silicone motor wiring extends motor leads by 11cm. The extensions are 20AWG silicone wire and can be cut and soldered at any point. We don't recommend cutting further back than the connection to the motor winding leads unless you know what you're doing with respect to removing enamel from the wire. The motors have standard 16x19 M3 mounting threads.
Included with every Cobra 2204 Series Motor is a complete accessory package containing:
● Four M3x5mm Motor Mount Screws and spacing washers
● 5mm integrated prop adapter with nylon locknut
|Cobra 2204/28 Motor Specifications|
|Stator Diameter||22.0 mm (0.866 in)|
|Stator Thickness||4.0 mm (0.157 in)|
|Number of Stator Slots||12|
|Number of Magnet Poles||14|
|Motor Wind||28 Turn Delta|
|Motor Kv Value||2300 RPM per Volt|
|No Load Current (Io)||0.66 Amps @ 8 Volts|
|Motor Resistance (Rm) per Phase||0.126 Ohms|
|Motor Resistance (Rm) Phase to Phase||0.084 Ohms|
|Maximum Continuous Current||15 Amps|
|Max Continuous Power (2-cell Li-Po)||125 Watts|
|Max Continuous Power (3-cell Li-Po)||180 Watts|
|Motor Weight||24.6 grams (0.87 oz.)|
|Outside Diameter||27.0 mm (1.063 in.)|
|Shaft Diameter||3.00 mm (0.118 in.)|
|Motor Body Length||14.2 mm (0.559 in.)|
|Overall Shaft Length||32.5 mm (1.145 in.)|
|Motor Timing||5-10 degrees|
|PWM Frequency||8 KHz|
Canadian customers - please note that any motor requires shipping via Expedited Parcel. There's a bug in the shipping system that doesn't pull this up automatically. If you see "Canada Post lettermail" as an option you'll need to choose the other, more expensive option that corresponds to your province to get Expedited Parcel service. Sorry about that!