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EGODRIFT ·SKU 11964
Tengu 4025EC Eclipse
Tengu 4025EC Eclipse
Next-generation performance motor used in all major F3A drives/contra-drives. Also perfect your 500–550 size helicopter.
Usually ships within 1–2 days
We'll be in touch with you to ensure the perfect wind for your setup.
If you already have a target Kv in mind, please enter it below:
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Description
Description
Our latest innovation in the 4025 size, the EGODRIFT Tengu 4025EC Eclipse, features - and has been completely rebuilt - around our new custom stator in the 40mm size. Trusted by leading f3a drive manufacturers and pilots alike, and an equally great choice for your 500-550 sized heli.
Available Kv Options
- 550Kv – F3A / Heli
- 570Kv – F3A / Heli
- 650Kv – F3A
- 1080Kv – Heli
Technical Highlights
- Custom EGODRIFT stator
- Tailored arc magnets for optimal power delivery
- 6mm shaft for further weight reduction
- Base with 4×M4(30) mounting holes
Specifications
Specifications
All the products in our store are manufactured by us with great care. You knew that, but we get why you clicked the tooltip - and thanks.
The stator size of our motors is indicated as a combined number, where the first two digits refer to the stator width, and the last two digits refer to the stator height.
So a 4730 stator size refers to a motor with a stator width of 47 mm, and a stator height of 30 mm.
On large industry models with a stator diameter in exess of 100 mm (like our Jetstream Heavy Duty Series, these numbers are seperated by a dash, like 100-30 or 150-50.
The motor configuration gives you information about the number of stator arms/slots (N) and magnetic poles (P). So a 12N10P denomination refers to a motor with 12 arms and 10 poles.
This information includes the number of mounting holes, their respective thread size, and the bolt circle on which the holes are placed — shown as the number in brackets.
Example 1: "4x M4(30)"
This means that the motor features four M4 mounting holes, placed on a 30 mm bolt circle.
For extended compatibility with a wide range of models, some of our motors feature a combination of different mounting hole sizes and/or bolt circles. In this case, the information is shown as follows:
Example 2: "2x M4(30) + 2x M3(25)"
This means that the motor features two M4 mounting holes placed on a 30 mm bolt circle, and two M3 mounting holes placed on a 25 mm bolt circle.
Don’t worry if only two of the mounting holes, opposite to each other, line up with your mounting bracket or motor plate. Using only two screws is perfectly fine — but as with any metal thread, always use threadlocker.
This number refers to the legth of the motor body excluding the shaft, so from the mounting plate to the top of the rotor.
This number refers to the width (maximum extension from side to side) of the motor.
When checking the clearance in your frame, this is the number to compare it against.
Shaft Compatibility
Shaft Compatibility
Our EGODRIFT Tengu 4025EC is available from us in 6x32 mm and 6x40 mm (external) shaft configuration. Please refer to the requirements of your f3a drive or helicopter kit to pick the right version.
Note for Adverrun users: A tailored 6x37mm shaft version of this motor is available via Aderrun directly and exclusively.



What's in the box
Box contents for
Tengu 4025EC Eclipse 550Kv / 6x40mm
- 1 x Tengu 4025EC Eclipse / 550kV Motor with 6x40mm shaft
- 3 x Gold Plated Connector, Male
- 3 x Gold Plated Connector, Female
- 4 x Mounting Screws
- 1x Bell securing screw
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