How to match an electric motor to an RC aircraft
A practical guide to motor KV, voltage, current, thrust, aircraft weight and flight style so the power system matches the model.
B40 7L kv4060 + MAXON 4.4:1 ceramic is a professional Hacker B40 item from Hacker Motor GmbH, prepared for the RC-MODEL catalog with customer-facing information, official product imagery, structured specifications and no storefront supplier pricing.
This product is relevant for RC builders and pilots looking for hacker b40, replacement parts, upgrades or setup components. Use it when planning a new model build, maintaining an existing aircraft, boat or radio system, or comparing compatible electronic and power-system parts.
Confirm the physical dimensions, weight, voltage, current rating, connector style, shaft size, cell count, propeller range and installation space against your model. RC-MODEL can help verify compatibility when you provide the model name and part number.
B40 7L kv4060 + MAXON 4.4:1 ceramic Product description and features The B40 7L + MAXON 4.4:1 motor with ceramic gearbox is used in lightweight hotliners up to 1600 grams. This slim inrunner is ideal for glider models and lightweight hotliners with slim fuselages. The flange-mounted Maxon 4.4:1 gearbox enables the use of large propellers. The two end shields are bolted together to increase durability and mechanical stability. The maximum screw-in depth of the mounting screws is 4.5 mm. Accessori
Reference SKU/model: 10001200. Mention this reference when contacting RC-MODEL for availability or fitment support.
These guides explain the setup, safety checks and accessory choices that usually matter for this product type.
A practical guide to motor KV, voltage, current, thrust, aircraft weight and flight style so the power system matches the model.
Diameter, pitch, motor load, current measurement and how propeller choice changes thrust, speed, efficiency and heat.
ESC selection by maximum current, voltage, BEC, safety margin, cooling, connector choice and the real load from motor and propeller.
A step-by-step safety guide for measuring amps, watts and voltage sag so customers avoid overheating motors, ESCs and LiPo batteries.
A safety and performance guide to propeller balance, spinner fit, bent shafts, motor mounts, firewall checks and protecting electronics from vibration.
| Technical Specifications | |
| Manufacturer | Hacker Motor GmbH |
| Product Type | Hacker B40 |
| SKU | 10001200 |
| EAN | 4250320207702 |
| Availability | In stock |
| Weight [g] | 205 |
| Poles | 2 |
| Turns | 7 |
| Idle current (I0) at 8.4V [A] | 2,92 |
| Internal resistance (Ri) [Ohm] | 0,0086 |
| Gear reducing | 4,4:1 |
| Recommended timing [°] | 0 - 5 |
| Switching Frequency [kHz] | 8 |
| Controller recommendation [A] (depending on setup) | 70 |
| Length [mm]/[in] | 78,2 78,2 |
| Outer diameter [mm]/[in] | 27,6 |
| Shaft diameter [mm]/[in] | 4 |
| Prop Adapter | Nein |
| Gold plug mm (recommended) | 4 |
| Backmount mountable | Nein |
| Front mountable | Ja |
| max. power range [W] (max.15 sec.) | 700 |
| Mounting cross | Nein |
| Idle speed per volt (kv) | 4060 |
Tags: Hacker Motor GmbH, B40 7L kv4060 + MAXON 4.4:1 ceramic, Engines & Power, Electric Motors, Hacker Inrunner, Hacker B40
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