that is a shaft drive or a belt drive... I looked for one a long time ago with no luck.... u might have to custom build one frankensteining your heli with a shogun... zoom or something smaller like the dragonfly.... good luck... DD (direct drive) is known around here as a motor on the tail, without gears to change the ratio to the tail rotor... It would be cool to know if someone has done it... it would be nice to have a shaft drive on my piccolo.