I think fly-by-wire is a fabulous concept and in the right hands it has been made to work but I'm damn sure I'd not want a shred of wire connecting me to something as important to my throttle unless I'd lifted the whole shebang straight from a Eurofighter then had it serviced by the OEM and delivered and fitted by qualified techies.I can see I'm not going to be able to convert you to a love of fly-by-wire any time soon, Bill, but thanks very much for the web link. That's an interesting site and there is some kit there that we may be able to use.
You may be able to infinitely vary the ratio with your computer but traditionally this is why your brain is connected to your hand (or your foot) and, as for instrumenting it, fit an encoder on the shaft and have someone with a laptop reverse engineer it from there.
This is not a criticism, Nigel, it's more an outpouring of frustration because I sometimes wonder just who fills your head with all this nonsense. We all want to see your boat on the water, God knows we do, but at this rate you're going to be stepping aboard using a Zimmer. Engines have been reliably connected to throttles with string and sticky-tape a hell of a lot further away and at stranger angles than you have in mind since the fifties and now all of a sudden it's become a challenge?
Come on - stop wasting money on boffins' private flights of fancy and build a bloody boat, will you!