The prototype continued to serve as a test machine until it was scrapped on 28 January 1946.
He devised a test machine for conveyor chains used in the Clausthal mines.
But again, only one or two test machines ever flew in that configuration.
Reynold Johnson was a teacher who set out to develop an automatic test scoring machine.
The test machine consists of a bearing race mounted on a tapered arbor rotating at high speed.
He also found the ZX81 to be alarmingly unreliable, having to have his first two test machines replaced before getting one that worked properly.
Various test machines have been developed to measure slip angle in a controlled environment.
This summer it will start to deliver its initial test machines to the 200 customers who have agreed to buy them.
The test machines we ran our benchmarks on are:
This situation can be minimized by using spherical seats or U-joints between the grips and the test machine.