This is a simple to install drive replacement for any model that was equipped with a KTM permanent magnet open frame motor but can also be installed and any locomotive that has space restrictions The K26 is equipped to be installed from either the front, the rear, or from below. The KTM motor was installed in thousands of models during the 1970s. The worm installed is a 0.35M worm positioned to fit exactly over the driving gear of the WMC C-16 from the 1970s.
These drives are equipped with a powerful and uber smooth coreless motor that is DCC friendly and a 3:1 gear reduction. Gears are precision machined 0.2Modulus. At 12VDC the motor will spin at 13000RPM but with reduction, the drive shaft will spin 4300RPM while at the same time increasing the torque by three times.
This drive is designed to make use of the existing model equipped worm drive. Many of the early HOn3 and small HO locos had worm drives with a 24:1 reduction. Small motors of the day turned at 12000RPM so at 12VDC, the RPMs on the axles was 500RPM. This translates into a max scale speed (for an HO 38” driver) of 65MPH! Now sure, you can apply less volts to the rails, but then you are only using 1/3 of the available speed and this also reduces pulling power and invites motor stalling. (As an aside, the average speed of the Durango & Silverton trains is 12MPH while the Cumbres & Toltec is 14MPH!). Once the K26 is installed, your max scale speed of 22MPH with three times the pulling power and very slick low speed crawling for switching