Doomking:

With an introduction like that how could I fail to answer? But I dispute the "Master" designators. George Lumpkin, AKA "Twinman," who is also a moderator on this forum is a lot more experienced than I when we're talking about little twins.

But Twinman doesn't worry much about synchronization. He generally sets the planes up so that he can deliberately put the engines out of sync.

I'm the other way. I like to have the engines singing sweetly together.

And there is only one way to lock them together for absolute synchronization without having separate channels for ewach engine and constantly fiddling with the knobs, and that's with a small on-board computer.

The EMS/Jomar Twin Engine Synchronizer costs $90 for the bare box, you have to supply the external connectors and most of the wiring. And wire it yourself. It also has to have metal backplates for the spinners, you mount magnets in them for the rpm sensors. On my C-3/10 the total was about $200, but that included Tru-Turn spinners. Many other less expensixe spinners have the aluminum backplates. But once you have the engines adjusted properly the EMS device locks the engines together. The attached picture is the circuit board. You get it with all the components soldered on, all the wiring yu see has to be added by you. You get the populated board, a box for it, and the parts for the rpm pickup.

Highly recommended, if you want to spend the money and do the installation. It does require separate throttle servos.

Synchro continued in next post.

Bill.