Checking tachometer accuracy

Half joking, but is there really anyone who is rich enough to operate an aircraft piston engine without an engine analyser?

P.S. …or without a Dynavibe gizmo to balance the prop?

Jacko wrote:

but is there really anyone who is rich enough to operate an aircraft piston engine without an engine analyser?
P.S. …or without a Dynavibe gizmo to balance the prop?

Yes, of course.

Do Rotax have mechanical tachs, or are all displayed engine data derived from the ECU lke my Inntec 800? Although that also has a battery-powered TinyTach, in case of total electrical failure.

O200 owners.

I’ve never flown a plane with an engine analyzer.

I could without the slightest trouble fly my A-65 powered plane without a tachometer, or any other engine instrumentation. It would have no measurable effect on fuel consumption, which I can regardless afford quite easily at $20/hr of 100LL… Unless I were to fly 200 hrs a month

As described in my post above, I could fly my O-320 powered CS prop plane with no tachometer, because the engine speed control is digital and accurate. This makes the tach mostly redundant except that its the only way I know airframe hours from one year to the next.