This one is a WT-38. There are several others all similar though. I think with the pump, it would stand a bigger venturi though.

The linkage on this particular model is a bit awkward, so I will need to take the standard arm off, drill and tap the shaft and put something else on. Done that before, not too fiddly.


The Edge 540 is a candidate for the converted motor, although it ain't got much bulkhead and it might not go in. Not got much else big enough to take it. The YAK now has an SPE with a bigger 11.1mm carb, which is where the SC 180 came from. It has a big bulkhead into which I could make a hole for the carb. But the SPE is going great on it's new carb now, so it's a keeper in that plane.

I'll let you know if the big end lasts on 20:1 mineral oil, once I find an airframe