It is left up to the individual builder.
To my knowledge nobody has done such a test on a rotary. IMHO sounds too
draconian.
The FAA 150 hour engine certification requirements are much less
stringent.
Max power runs are limited to 5 minutes. The Le Mans duty cycle for the
Mazda 4 rotor was much more severe. See the attached chart.

In any liquid cooled engine one degree increase in ambient temperature
decreases cooling effectiveness roughly one percent.

In the Mike Wills rotary powered RV4 one can taxi for a mile without the
engine coolant rising above 180 F at an ambient temperature of 80F.

Paul Lamar


Oke, and how many hours did your test with you plane for example? It is
good to have some reference from all the builders.

Many thanks!

Kevin

I bought Mike Wills airplane and it had about 20 hours of ground running
and 30 hours of flying. Most people use Tracy Crook's gear box and
EFI system so that has been tested by many people. The main time consuming
thing is getting it tuned for flight. Once that is done there is little
incentive
to continue ground testing. The engine itself is not coming apart if
it runs well and has good compression in both rotors. That takes five
minutes  to find out.

Paul Lamar


I think had just under 15 hours of ground operation. That may not sound like
a lot, but trust me.  After you get everything working right and you are
sitting there on the ground for HOURS ON END it seems like a long time.
Eventually people in the other hangars start looking at you like "either fly
that thing or shut it off..."  Then YOU start to get bored and taxi it all
over the airport... until that gets old.  Then you really start to think
that you should be flying instead of sitting on the ground burning gas and
making noise.

But you had in your head that you needed umteen hours on the ground and you
still only have 15.  But you can't take it anymore so you fly it... and that
never gets old.  :-)