Serhii.K : Cobra Brushless Motors
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Cobra motors test data
The repository contains test data, specifications and performance curves for Cobra motors for drone applications. Datasets with test results contain dependencies of thrust, electric current, input power, RPM and efficiency on the throttle for the specific motor and propeller assemblies. For each motor type test datasets are grouped by KV and propeller type and named accordingly. Relations of the listed motor parameters on the throttle are constructed as smooth curves for each test assembly. Specifications on main motor properties, like weight, dimensions, voltage, etc. are attached to each folder representing a motor.
Motor features
According to the manufacturer, stators are made with laminations that are only 0.2mm thick for maximum efficiency and minimum Eddy Current losses. The motor front housings feature built-in magnet spacers that lock the magnets in place in perfect alignment with one another, and reinforce the glue joints for maximum bonding strength. On the larger size motors, there is a lip on the back edge of the rotor can that captures the magnets and prevents them from shifting under the highest power loads. The bearings used in Cobra motors are much larger than most other brands of motors for increased life and durability, and resistance to damage from the occasional 'Rough Landing'. All motors have included prop washers and nylon insert prop nuts that provide a solid attachment for propellers that will not loosen up and slip during use.
Cobra motors range in size from 22mm to 45mm and offer 3 to 5 different Kv values per model to allow the user to get the exact motor needed to match the battery size and propeller restrictions of their particular assembly.
Cobra 22mm Multirotor motors
The Cobra CM-2204 series motors have a 3.0mm motor shaft for extra strength. The CM-2204 motors come without bullet connectors and feature extended pre-tinned motor leads that are 4-1/2 inches (110mm) long. These motors also have 3mm threaded holes in a 16x19mm pattern on the back plate for easy installation on your model. The CM-2204 series motors feature an integrated 5mm threaded motor shaft which eliminates the chance of having a prop adapter spin off in flight.
The Cobra CM-2208 series motors have a 3.0mm motor shaft for extra strength. The CM-2208 motors come without bullet connectors and feature extended pre-tinned motor leads that are 10 inches (254mm) long. These motors also have 3mm threaded holes in a 16x19mm pattern on the back plate for easy installation on your model. The CM-2208 series motors feature an integrated 5mm threaded motor shaft which eliminates the chance of having a prop adapter spin off in flight.
The Cobra CM-2213 and CM-2217 series motors have a 3.17mm motor shaft for extra strength. The CM-2213 and CM-2217 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 16x19mm pattern on the back plate for easy installation on your model. The CM-2213 and CM-2217 series motors include a bolt-on style prop adapter has an M5x0.8mm thread for holding traditional multirotor props that have a 5mm center hole.
Cobra 28mm Multirotor motors
The Cobra CM-2814 series motors have a 5.0mm motor shaft for extra strength. The CM-2814 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 25x19mm pattern on the back plate for easy installation on your model. The CM-2814 series motors include mounting options for both flat carbon fiber props and conventional style props. The top of the motor has a 4mm centering pin and four M3x0.5mm threaded holes on a 12mm mounting circle. Also included is a bolt-on style prop adapter that features an M6x1.0mm thread.
The Cobra CM-2820 series motors have a 5.0mm motor shaft for extra strength. The CM-2820 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 25x25mm pattern on the back plate for easy installation on your model. The CM-2820 series motors include mounting options for both flat carbon fiber props and conventional style props. The top of the motor has a 4mm centering pin and four M3x0.5mm threaded holes on a 12mm mounting circle. Also included is a bolt-on style prop adapter that features an M6x1.0mm thread.
Cobra 35mm Multirotor motors
The Cobra CM-3515 and CM-3520 series motors have a 5.00mm motor shaft for extra strength. The CM-3515 and CM-3520 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 25x25mm pattern on the back plate for easy installation on your model. The CM-3515 and CM-3520 series motors include a bolt-on style prop adapter has an M6x1.0mm thread for holding traditional multirotor props that have a 6mm center hole.
Cobra 40mm Multirotor motors
The Cobra CM-4008 series motors have a 4.0mm motor shaft for extra strength. The CM-4008 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 19x25mm pattern on the back plate for easy installation on your model. The CM-4008 series motors allow for multiple propeller mounting options. They have a set of four of 3mm threaded holes located on a 12mm circle for directly mounting carbon fiber props that use two 12mm spaced holes, or to mount the included bolt-on style prop adapter. This prop adapter has an M6x1.0mm thread for holding traditional multirotor props that have a 6mm center hole.
Cobra 45mm Multirotor motors
The Cobra CM-4510/28 motor has a 6.0mm motor shaft for extra strength. The CM-4510/28 motor comes without bullet connectors and feature extended pre-tinned motor leads that are 13 inches (330mm) long. This motor also has 3mm threaded holes in a 25x25mm pattern on the back plate for easy installation on your model. The CM-4510/28 motor allows for multiple propeller mounting options. It has a pair of 3mm threaded holes that are 12mm apart for mounting carbon fiber props that use this attachment method. There are also four other 3mm threaded holes for attaching the included bolt-on style prop adapter. This prop adapter has an M6x1.0mm thread for holding traditional multirotor props that have a 6mm center hole.
The Cobra CM-4510/40 motor has a 6.0mm motor shaft for extra strength. The CM-4510/40 motor comes without bullet connector and feature extended pre-tinned motor leads that are 17 inches (430mm) long. This motor also has 3mm threaded holes in a 25x25mm pattern on the back plate for easy installation on your model. The CM-4510/40 motor allows for multiple propeller mounting options. It has a pair of 3mm threaded holes that are 12mm apart for mounting carbon fiber props that use this attachment method. There are also four other 3mm threaded holes for attaching the included bolt-on style prop adapter. This prop adapter has an M6x1.0mm thread for holding traditional multirotor props that have a 6mm center hole.
The Cobra CM-4515 and CM-4520 series motors have a 6.0mm motor shaft for extra strength. The CM-4515 and CM-4520 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 25x25mm pattern on the back plate for easy installation on your model. The CM-4515 and CM-4520 series motors allow for multiple propeller mounting options. They have a pair of 3mm threaded holes that are 12mm apart for mounting carbon fiber props that use this attachment method. There are also four other 3mm threaded holes for attaching the included bolt-on style prop adapter. This prop adapter has an M6x1.0mm thread for holding traditional multirotor props that have a 6mm center hole.
Reference
https://www.cobramotorsusa.com/
Cobra motors test data
The repository contains test data, specifications and performance curves for Cobra motors for drone applications. Datasets with test results contain dependencies of thrust, electric current, input power, RPM and efficiency on the throttle for the specific motor and propeller assemblies. For each motor type test datasets are grouped by KV and propeller type and named accordingly. Relations of the listed motor parameters on the throttle are constructed as smooth curves for each test assembly. Specifications on main motor properties, like weight, dimensions, voltage, etc. are attached to each folder representing a motor.
Motor features
According to the manufacturer, stators are made with laminations that are only 0.2mm thick for maximum efficiency and minimum Eddy Current losses. The motor front housings feature built-in magnet spacers that lock the magnets in place in perfect alignment with one another, and reinforce the glue joints for maximum bonding strength. On the larger size motors, there is a lip on the back edge of the rotor can that captures the magnets and prevents them from shifting under the highest power loads. The bearings used in Cobra motors are much larger than most other brands of motors for increased life and durability, and resistance to damage from the occasional 'Rough Landing'. All motors have included prop washers and nylon insert prop nuts that provide a solid attachment for propellers that will not loosen up and slip during use.
Cobra motors range in size from 22mm to 45mm and offer 3 to 5 different Kv values per model to allow the user to get the exact motor needed to match the battery size and propeller restrictions of their particular assembly.
Cobra 22mm Multirotor motors
The Cobra CM-2204 series motors have a 3.0mm motor shaft for extra strength. The CM-2204 motors come without bullet connectors and feature extended pre-tinned motor leads that are 4-1/2 inches (110mm) long. These motors also have 3mm threaded holes in a 16x19mm pattern on the back plate for easy installation on your model. The CM-2204 series motors feature an integrated 5mm threaded motor shaft which eliminates the chance of having a prop adapter spin off in flight.
The Cobra CM-2208 series motors have a 3.0mm motor shaft for extra strength. The CM-2208 motors come without bullet connectors and feature extended pre-tinned motor leads that are 10 inches (254mm) long. These motors also have 3mm threaded holes in a 16x19mm pattern on the back plate for easy installation on your model. The CM-2208 series motors feature an integrated 5mm threaded motor shaft which eliminates the chance of having a prop adapter spin off in flight.
The Cobra CM-2213 and CM-2217 series motors have a 3.17mm motor shaft for extra strength. The CM-2213 and CM-2217 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 16x19mm pattern on the back plate for easy installation on your model. The CM-2213 and CM-2217 series motors include a bolt-on style prop adapter has an M5x0.8mm thread for holding traditional multirotor props that have a 5mm center hole.
Cobra 28mm Multirotor motors
The Cobra CM-2814 series motors have a 5.0mm motor shaft for extra strength. The CM-2814 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 25x19mm pattern on the back plate for easy installation on your model. The CM-2814 series motors include mounting options for both flat carbon fiber props and conventional style props. The top of the motor has a 4mm centering pin and four M3x0.5mm threaded holes on a 12mm mounting circle. Also included is a bolt-on style prop adapter that features an M6x1.0mm thread.
The Cobra CM-2820 series motors have a 5.0mm motor shaft for extra strength. The CM-2820 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 25x25mm pattern on the back plate for easy installation on your model. The CM-2820 series motors include mounting options for both flat carbon fiber props and conventional style props. The top of the motor has a 4mm centering pin and four M3x0.5mm threaded holes on a 12mm mounting circle. Also included is a bolt-on style prop adapter that features an M6x1.0mm thread.
Cobra 35mm Multirotor motors
The Cobra CM-3515 and CM-3520 series motors have a 5.00mm motor shaft for extra strength. The CM-3515 and CM-3520 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 25x25mm pattern on the back plate for easy installation on your model. The CM-3515 and CM-3520 series motors include a bolt-on style prop adapter has an M6x1.0mm thread for holding traditional multirotor props that have a 6mm center hole.
Cobra 40mm Multirotor motors
The Cobra CM-4008 series motors have a 4.0mm motor shaft for extra strength. The CM-4008 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 19x25mm pattern on the back plate for easy installation on your model. The CM-4008 series motors allow for multiple propeller mounting options. They have a set of four of 3mm threaded holes located on a 12mm circle for directly mounting carbon fiber props that use two 12mm spaced holes, or to mount the included bolt-on style prop adapter. This prop adapter has an M6x1.0mm thread for holding traditional multirotor props that have a 6mm center hole.
Cobra 45mm Multirotor motors
The Cobra CM-4510/28 motor has a 6.0mm motor shaft for extra strength. The CM-4510/28 motor comes without bullet connectors and feature extended pre-tinned motor leads that are 13 inches (330mm) long. This motor also has 3mm threaded holes in a 25x25mm pattern on the back plate for easy installation on your model. The CM-4510/28 motor allows for multiple propeller mounting options. It has a pair of 3mm threaded holes that are 12mm apart for mounting carbon fiber props that use this attachment method. There are also four other 3mm threaded holes for attaching the included bolt-on style prop adapter. This prop adapter has an M6x1.0mm thread for holding traditional multirotor props that have a 6mm center hole.
The Cobra CM-4510/40 motor has a 6.0mm motor shaft for extra strength. The CM-4510/40 motor comes without bullet connector and feature extended pre-tinned motor leads that are 17 inches (430mm) long. This motor also has 3mm threaded holes in a 25x25mm pattern on the back plate for easy installation on your model. The CM-4510/40 motor allows for multiple propeller mounting options. It has a pair of 3mm threaded holes that are 12mm apart for mounting carbon fiber props that use this attachment method. There are also four other 3mm threaded holes for attaching the included bolt-on style prop adapter. This prop adapter has an M6x1.0mm thread for holding traditional multirotor props that have a 6mm center hole.
The Cobra CM-4515 and CM-4520 series motors have a 6.0mm motor shaft for extra strength. The CM-4515 and CM-4520 motors come without bullet connectors and feature extended pre-tinned motor leads that are 17 inches (430mm) long. These motors also have 3mm threaded holes in a 25x25mm pattern on the back plate for easy installation on your model. The CM-4515 and CM-4520 series motors allow for multiple propeller mounting options. They have a pair of 3mm threaded holes that are 12mm apart for mounting carbon fiber props that use this attachment method. There are also four other 3mm threaded holes for attaching the included bolt-on style prop adapter. This prop adapter has an M6x1.0mm thread for holding traditional multirotor props that have a 6mm center hole.
Reference
https://www.cobramotorsusa.com/
