We have seen a lot of small-scale engines shared by JohnnyQ90 on YouTube, however this one is totally different. That is as a result of there’s an honest-to-goodness three-speed handbook gearbox connected to the again, and we would like it.
This setup makes use of three ahead speeds in addition to a reverse gear, operated by friction clutches. It is all contained in an aluminum housing that is 3D printed, and kit adjustments are achieved by two connections on the highest of the gearbox. The lever closest to the engine selects ahead, impartial, or reverse, whereas the opposite lever goes by first, second, and third. They’re operated by two servos; a 3rd servo controls the engine’s throttle.
Toggle switches on the controller function the transmission, with throttle enter managed by a squeeze set off. The setup is demonstrated on a easy base the place the engine and transmission are linked to a spinning weight, which locations simply sufficient drag on the powertrain to listen to the revs climb by the gears and totally different charges. All of it appears to perform nicely, even dealing with full-throttle gear adjustments with none obvious points. Whether or not that is the case after 5 years or 60,000 miles, nonetheless, stays to be seen.
As with different JohnnyQ90 movies, the eye to element within the building of those small mills is astounding. The clip opens with the creation of a smaller pulley to get extra stress from the water pump, and aspect panels on the oil pan are changed with glass so we will see the crankshaft in motion. And the sound is not unhealthy, both.
The video description features a hyperlink to purchase the three-speed stick, exhibiting a price ticket of $439.99. It is also provided as a bundle with the engine (a 17.5-cc four-cylinder) for a price of $1,291.97. All we want is a 1:8 scale Honda S2000, and our radio-controlled goals can be full.