Being a sucker for cheap and strange nitro engines, I had to buy a Toki .15
There's videos of them running, and they've been discussed on the forum a few times, but I can't find much more than that about them. They seem popular for those janky little DC generator "kits" which I assume only exist to win science fairs.
The first thing I noticed was the unusual construction - the carb is screwed down instead of using a pinch bolt, and the crankcase splits in two at the cylinder, held on with only 3 bolts. Pulling it off revealed stranger differences: it has no piston liner! The cooling head, button, and piston are all a single piece of machined aluminum, unless they somehow nickel- or chrome-plated it on the inside. The piston appears to be brass, as does the connecting rod, but I don't know if that'd even survive, maybe some aluminum alloy. So instead of ABC or ABN, it's BA - brass piston in an unlined (?) aluminum piston.
Probably gets pretty great cooling, though.
There's videos of them running, and they've been discussed on the forum a few times, but I can't find much more than that about them. They seem popular for those janky little DC generator "kits" which I assume only exist to win science fairs.
The first thing I noticed was the unusual construction - the carb is screwed down instead of using a pinch bolt, and the crankcase splits in two at the cylinder, held on with only 3 bolts. Pulling it off revealed stranger differences: it has no piston liner! The cooling head, button, and piston are all a single piece of machined aluminum, unless they somehow nickel- or chrome-plated it on the inside. The piston appears to be brass, as does the connecting rod, but I don't know if that'd even survive, maybe some aluminum alloy. So instead of ABC or ABN, it's BA - brass piston in an unlined (?) aluminum piston.
Probably gets pretty great cooling, though.