ORIGINAL: HighPlains
Most would have no idea who Spreng or Brook were.
Doug Spreng more or less invented the entire digital proportional radio concept back in 1962.
I was particularly taken with the crossed staves of the Union Flag and "Old Glory" on the case. Very fetching I thought. And the mauve vinyl was very á la mode.
But I actually had to make do with a MacGregor Galloping Ghost set, a "Supermac" regenerative receiver, Rand LR3 and DEAC cells. It was good for only 2 x 5 minute flights before the cells discharged to the point where it wouldn't drive the throttle bit of the servo and just stalled in the "Full up, Full right" position. Groovy! So ended my "Aviette Senator".
The only thing I ever got to work with that set was a Veron Impala with a power pod containing an ME Heron diesel. No throttle you see.
My demented sheepdog one day went and herded that model upon landing, and, it being unresponsive, the dog bit the recalcitrant fuselage.
Collie 1, Impala 0. Sigh!
etc
Carole Sherrington