/diy/ - Do It Yourself

>>1152522
>so will this work, Black pulleys [top one idler] red belt, I just need to pull a lever to engage the idler and put tension, causing the other pulley [prop shaft] to start spinning with the motor.
Yes, it works.
In fact two of the most popular models of light helicopter are clutched that way (pic related). They don't leave the engine running with the clutch disengaged for very long though. It's engaged within seconds of starting the engine and disengaged 30 seconds before shutdown.