ORIGINAL: corbystarlet11
I put mine in a vice, which it holds it tight. I just had a brocken aerial on my reciever and a spare servo, this idea is good so i can controll the revs in a safe distance with my Transmitter.
I would highly recomend that you not do this. Its not safe and can damage your engine. With the pressure of the vice you can easily damage the crankase.
Worst case scenario if the engine is not seated correctly and just feels tight in the vice it could vibrate loose and then you would really have a mess.
The engine really needs to be bolted down to something.
As far as a homemade test stand I have always thought about building a solid stand and then making plastic cutting board engine mounts like on a SPAD. On the back of each mount you could make the same bolt pattern so all you would have to do is bolt the mount to the stand. That way you can change motor mounts and always have the same bolt mount pattern on your stand.