Skip to main content
B40-8L Comp + 6,7:1 Kv 3470

B40-8L Comp + 6,7:1 Kv 3470



Prices are intentionally not displayed on the site. Contact RC-MODEL for current availability, technical fit, compatible accessories and a formal quote.
Quote quantity Choose the requested quantity, select options/variants if available, and add the item to one combined quote request.

These selections are sent with the SKU, model and quantity so we can check fit and availability.

B40-8L Comp + 6,7:1 Kv 3470

B40-8L Comp + 6,7:1 Kv 3470 is a professional Hacker B40-Competition 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.

Recommended use

This product is relevant for RC builders and pilots looking for hacker b40-competition, 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.

What to check before ordering

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.

Key details

  • max. power range [W] (max.15 sec.): 1100W (max. 10 sec.)
  • Poles: 2
  • Turns: 8
  • Idle current (I0) at 8.4V [A]: 3,2
  • Internal resistance (Ri) [Ohm]: 0,012
  • Gear reducing: 6,7:1
  • Output shaft: 6mm
  • Recommended timing [°]: 0° - 5°
  • Switching Frequency [kHz]: 8
  • Controller recommendation [A] (depending on setup): 55 - 90
  • Leerlaufdrehzahl pro Volt (kv) ohne Getriebe: 3470
  • Weight [g]: 237
  • Length [mm]/[in]: 89,7
  • Diameter [mm]/[in]: 29

B40-8L Comp + 6,7:1 Kv 3470 Product description and features B40-8L Comp + 6.7:1 Kv 3470 gearbox is specially designed for F3J, F3B, purpose-built gliders or light thermal models up to 4m and up to 3.0kg take-off weight. The integrated high-performance fan optimally cools the motors of the B40-Competition. The running noise is also minimised by asymmetrically arranged air outlet holes. The external housing design with milled cooling grooves offers perfect heat dissipation with minimum weight. Th

Reference SKU/model: 10090904. Mention this reference when contacting RC-MODEL for availability or fitment support.

Relevant RC Academy guides

Learn before you buy

These guides explain the setup, safety checks and accessory choices that usually matter for this product type.

Technical Specifications
Manufacturer Hacker Motor GmbH
Product Type Hacker B40-Competition
SKU 10090904
EAN 4250320247043
Availability In stock
Weight [g] 237
Poles 2
Turns 8
Idle current (I0) at 8.4V [A] 3,2
Internal resistance (Ri) [Ohm] 0,012
Gear reducing 6,7:1
Recommended timing [°] 0° - 5°
Switching Frequency [kHz] 8
Controller recommendation [A] (depending on setup) 55 - 90
Leerlaufdrehzahl pro Volt (kv) ohne Getriebe 3470
Length [mm]/[in] 89,7
Outer diameter [mm]/[in] 29
Shaft diameter [mm]/[in] 6
Prop Adapter Nein
Gold plug mm (recommended) 4 - 5,5
Backmount mountable Nein
Front mountable Ja
max. power range [W] (max.15 sec.) 1100W (max. 10 sec.)
Mounting cross Nein
Output shaft 6mm
Diameter [mm]/[in] 29

Tags: Hacker Motor GmbH, B40-8L Comp + 6, 7:1 Kv 3470, Engines & Power, Electric Motors, Hacker Inrunner, Hacker B40-Competition