Extension for RT3 In-Line Motor Support

Adjust your motor-support assembly with the Scaleauto RT3 In-Line extension

The RT3 In-Line Motor Support Extension (reference SC-6538B) is a preparation component designed by Scaleauto for those working with the RT3 bench in inline configuration. In an inline setup, the motor is positioned longitudinally relative to the rear axle, aligned with the chassis, which lowers the car's centre of gravity and improves cornering stability. This extension allows for the adaptation or expansion of the RT3 motor support position, offering greater flexibility when configuring the drivetrain.

Function and performance

This type of extension makes sense when the standard RT3 support mounting does not provide the exact positioning required for your project. By incorporating it, you can:

• Longitudinally shift the motor assembly to adjust the distances between pinion and crown gear.
• Achieve a more precise and quieter engagement between the transmission gears.
• Adapt the support to different chassis configurations in Scaleauto cars with inline motors.

Compatibility

This extension is designed for use with the RT3 motor support from Scaleauto in in-line configuration. Its application is indicated for cars from the Scaleauto brand that utilise this bench system. If you have doubts about whether it fits your specific setup, we recommend consulting your chassis diagram or contacting us before proceeding with the installation.

Installation and preparation

The installation of this extension does not require special tools, although, as with any slot preparation work, it is advisable to work calmly and verify the gear mesh before permanently gluing or securing any component. A small displacement can make the difference between a noisy transmission and one that runs smoothly.

• Check the clearance of the pinion-crown gear mesh before and after installing the extension.
• Ensure that the motor is not forced laterally once the piece is in place.
• Secure the assembly only when you are satisfied with the results of the dry run.

Frequently asked questions

Is this extension compatible with other motor supports besides the RT3?

The reference SC-6538B is specifically designed for the Scaleauto RT3 motor support in in-line configuration. We cannot guarantee its compatibility with other benches or supports from different brands without prior verification.

What is the difference between an inline configuration and a sidewinder?

In an inline configuration, the motor is oriented longitudinally relative to the rear axle, in line with the chassis, which favours a lower centre of gravity. In a sidewinder configuration, the motor is positioned transversely, parallel to the rear axle. They are distinct systems with their own support and transmission, not interchangeable with each other.

Do I need any specific tools to install it?

No special tools are required. The usual slot preparation tools —screwdriver, pliers, and some adhesive if necessary— are sufficient to carry out the installation correctly.

Is it sold together with the RT3 support or is it a standalone piece?

The SC-6538B is a standalone extension, intended as a complement for those who already have the RT3 motor support and need to adapt its position within the chassis.

The Scaleauto SC-6538B is an inline motor mount extension designed for the RT3 motor support system, compatible with Scaleauto slot cars. This precision part allows hobbyists and club racers to fine-tune the longitudinal position of the motor within the chassis, ensuring optimal gear mesh between pinion and crown gear. A must-have for builders working with inline motor configurations on Scaleauto platforms.