SPEKTRUM ACCESSORIES SPMXSM5400 Firma Brushless Motor 660132647834 4685 1450KV 8MM

( Brand: Spektrum Accessories ), ( Manufacturer Part Number: SPMXSM5400 ), ( Part Type: Motor ), ( Age Level: 17 Years Up ), ( UPC: 660132647834 )

Review SPEKTRUM ACCESSORIES Firma Brushless Motor 8mm

The Spektrum SPMXSM5400 FIRMa 4685 1450kV Brushless Motor is a high-performance electric motor designed for RC hobbyists and model aircraft builders. This motor is part of Spektrum's FIRMa series, which stands for "Fixed Idle, Reverse Motor Alternative." This design feature allows for easier setup and operation of RC models.

The motor has a diameter of 46.85mm and a length of 54mm, making it a popular choice for larger RC planes and multirotors. It features a 1450kV rating, which indicates the speed at which the motor can reach its maximum torque. A higher kV rating results in a faster RPM, which can be beneficial for models that require high thrust or power.

The motor is equipped with eight 3-blade propeller mounting holes, each with a diameter of 8mm. This allows for flexibility in propeller selection and allows users to optimize their model's performance based on their specific application. The motor's mounting holes are also compatible with common RC model mounting systems, making installation easy and straightforward.

The motor's brushed alternative design eliminates the need for brushes, which can wear out over time and require regular maintenance. This design feature also results in a more efficient motor, as there is less electrical resistance, leading to improved performance and longer battery life.

The Spektrum SPMXSM5400 FIRMa 4685 1450kV Brushless Motor is compatible with most RC hobbyist radio systems and ESCs. It is designed to provide reliable and consistent power output, making it an excellent choice for RC enthusiasts looking for a high-performance motor that requires minimal maintenance.

Overall, the Spektrum SPMXSM5400 FIRMa 4685 1450kV Brushless Motor is a versatile and powerful motor that offers a number of benefits for RC hobbyists and model aircraft builders. Its fixed idle design, high-speed kV rating, and brushless alternative design make it a popular choice for those looking to build or upgrade their RC models for optimal performance and efficiency.

Pros and Cons of buying a Spektrum SPMXS-M5400 Firma 4685 1450kV Brushless Motor 8mm

a. High Power Density: This motor offers a high power-to-weight ratio, making it an excellent choice for model aircraft that require high power but also need to keep their weight low.

b. Efficient: With a 14500kV rating, this motor is highly efficient, meaning it can convert more of the electrical energy from the battery into thrust for your model.

c. Durable: Spektrum motors are known for their durability, and the Firma series is no exception. The motor's robust design can withstand the rigors of frequent use, making it a reliable choice for modelers.

d. Versatile: This motor can be used in various types of model aircraft, including electric fixed-wing aircraft, electric helicopters, and electric multirotors.

a. Size: The 8mm motor size may be too large for some applications, particularly small model aircraft or multirotors that require smaller motors for optimal performance and efficiency.

b. Weight: Despite its high power density, this motor is heavier than smaller motors, which could negatively impact the overall weight and performance of your model aircraft.

c. Price: The Spektrum Firma series motors are generally more expensive than other brushless motors from various manufacturers, which could be a consideration for budget-conscious modelers.

The Spektrum SPMXS-M5400 Firma 4685 1450kV Brushless Motor 8mm is a high-performance, efficient, and durable motor that is well-suited for model aircraft requiring substantial power. Its high power density, robust design, and versatility make it an attractive option for modelers. However, its larger size, higher weight, and relatively higher cost may be disadvantages for some applications or budgets.

If you are building or upgrading a model aircraft that requires a powerful motor and can accommodate the larger size and weight, the Spektrum SPMXS-M5400 Firma 4685 1450kV Brushless Motor 8mm is an excellent choice. However, if you are working on a smaller model or need to keep your budget in check, you might want to consider other, smaller, and more affordable brushless motor options from various manufacturers.

Details:

The mounting of engines and Accessories, running fuel through engines, cutting or pushing out the balsa sheets in kits, other similar actions constitutes used merchandise. This motor features a low-cog 4-pole rotor design CNC machined aluminum housing insulated high-purity copper winding's high-quality alloy steel 8mm output shaft and precision bearings for durability smooth rotation. Sealed Lead Acid batteries. At Horizon Hobby, we help people have fun with hobbies.

Flammable or combustible materials products regardless of whether the item is open unopened such as: Nitro engines if fuel has entered engine, fuel, Unopened as well opened, charged and / used Lithium Ion Polymer Lip batteries other Lithium-based. Paints, thinners, certain glues or cements/pastes. Shipping conditions and parameters for batteries are particularly sensitive. Aerosols or compressed gas canisters.

Any type of opened, charged and / or used battery including Lip, Nickel-Metal Hydrate NIH, Nickel-Cadmium Nick, other Nickel-based batteries Alkaline-based. Our advances in model aircraft and vehicle stabilization, 2.4GHz control ready-to-run convenience have made RC hobbies more exciting accessible than ever before. Rockets, kits containing rockets with or without ignites, hobby fuel both quart gallon. The Spektrum Firma 4685 1450Kv Senseless Brushless Motor is the perfect replacement option for ARRMA Limitless 120 RTR.

part #: spmxsm5400 prices

• $129.99-$144.99

specifications rcparta:

• brand: Spektrum Accessories
• mpn: Spmxsm5400
• part type: Motor
• age level: 17 Years Up
• upc: 660132647834

shipping rcparta:

• class: Economy
• type: Fixed
• transit: 3-6 Days
• service: Economy
• cost: $0.00

general rcparta:

• Radio Control Control Line > RC model Vehicle Parts Accs > Other RC Parts Accs
• condition: New

offer rcparta:

• availability: In Stock
• sold: 0
• quantity: 3
• started: September 10, 2025
• options: Ship-to-home

seller rcparta:

• city: Champaign, Illinois
• # reviews: 231909
• rating: 99.5%

payments rcparta:

• credit card: Visa
• wallet: Paypal
• other

returns rcparta:

• paid by: Seller
• time: 30 Days
• method: Money back
• policy: Returns Accepted

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