RE: Tiny Diesels
George,
The Letmo is availble in two versions; radial-mount as shown and a beam-mount.
Tom,
I ran the VA .4 Mills and it started easily, as did the VA ED bee. The VA Elfin contra-piston is very tight and I need to lap it in.
George Aldrich had one of the VA Elfins and he suggested using a drill press to work the contra-piston up and down with fine lapping compound or jewlers'rouge until it can be easily adjusted.
I did get the Elfin to fire off a couple of quick bursts and it seems to have a lot of potential.
Many guys have said the AH Drone is a fantastic runner. Leon Shulman, designer of the Drone .29 was flying his mini-"Zomby" freeflight design a few years back, using the AH Drone.
Arne told me an interesting tid-bit on the little Dyno...if you put your finger over one of the exhaust ports the engine will increase about 500 RPM. The original AH mini-Dyno had an ABC piston/cylinder setup and was hard to start. Arne finally made a steel cylinder version for easier handling.