Metal 3-Speed Gearbox F-N-R Transmission Kit for TOYAN Gas Engine RC Car DIY
Hero Section: The Missing Link in Your Custom Build
Building a gasoline-powered RC car is the ultimate test of a modeler's skill. But a powerful engine like a TOYAN is limited if it can only go forward. This DIY Modified Metal Gearbox is the game-changer your project needs. It bridges the gap between raw engine RPM and drivable control, giving you the ability to shift between Forward, Neutral, and Reverse. It transforms a simple rolling chassis into a complex, maneuverable vehicle that functions just like a real car.
Why Choose This Metal Gearbox?
- True F-N-R Shifting: Elevate your driving experience. With distinct Forward, Neutral, and Reverse gears, you can idle your engine at the starting line without the wheels spinning, and back out of tight spots on the trail.
- Built for Torque: Gasoline engines generate significant torque that shreds plastic gears. This unit is crafted entirely from metal, ensuring it can handle the stress of combustion power while adding a premium, mechanical weight to your chassis.
- Torque Multiplication: It’s not just about direction; it’s about power. The internal gear reduction (approx 1:2 forward) multiplies your engine's torque, giving your model the grunt it needs to accelerate quickly or climb steep obstacles.
- DIY Freedom: The lever control system is designed for the custom builder. The linkage length is adjustable, allowing you to perfectly position your shifting servo to match your specific chassis layout.
Technical Highlights: Mechanics Explained
- Gear Ratios:
- Forward: 26/59 (Speed reduction for increased torque).
- Reverse: 19/14/59 (Uses an idler gear to reverse rotation).
- Universal Fitment: The gearbox utilizes standard 5mm input and output shafts. This is a common size in the hobby industry, making it compatible with a vast array of pulleys, couplers, and drive shafts.
- Compact Footprint: Measuring just 40x40x56mm (box size), it is engineered to fit into tight engine bays, leaving room for your electronics and fuel system.
Specifications
- Material: Full Metal Construction
- Gears: Forward / Neutral / Reverse
- Shaft Diameter: 5mm (Input and Output)
- Shaft Length: 60mm
- Total Length (with shaft): 70mm
- Box Dimensions: 40 x 40 x 56mm
- Overall Dimensions (with Pull Rod): 85 x 40mm
- Weight: 250g
- Gear Ratios: Forward (26/59), Reverse (19/14/59)
- Compatibility: DIY Gasoline RC Cars, TOYAN Engines (requires adaptation)
Usage Scenario: The Technical Trail
You are navigating a custom 1/10 scale truck through a rocky course. You approach a steep incline but take a bad line and get stuck against a boulder. In a standard gas car, you'd have to walk over and pick it up. With this gearbox, you simply flick a switch on your transmitter. The servo shifts the lever to Reverse. You back up, reposition, shift back to Forward, and conquer the hill. This is the level of realism and control this gearbox delivers.
Important Tips from the Workshop
- Clutch Essential: This gearbox is a transmission, not a clutch. It must be used with a centrifugal clutch on your engine. Without a clutch, shifting gears while the engine is running would be impossible and could damage the gears.
- No Internal Brakes: This unit controls direction, not stopping. You must install a separate braking system (like disc brakes on the driveshaft or wheel brakes) to stop your vehicle.
- Lubrication: While durable, metal-on-metal gears require care. Apply high-quality molybdenum grease to the gears periodically to ensure smooth shifting and reduce noise.
- Servo Setup: Use a high-torque servo for the shifting lever to ensure positive engagement of the gears under load.
Customer Support
Customizing a drivetrain requires precise planning. If you need assistance with shaft coupling sizes or servo linkage ideas, our technical team is here to help you complete your build. Contact us at service@helloworld7.com.
