On Sep 17, 6:45*pm, "Morgans" wrote:
"pittss1c" wrote

The flight test period is also the same weather you are testing a new
radical design or your 3rd RV with a lycosaurus.

Not so. *If you are using an engine and propeller combination that was
certified in any certified aircraft the flight test may be, and probably
will be, reduced to 25 hours.
--
Jim in NC

Right. I think if you were to take one right from the overhaul shop or
new from the box, that is easily the case.
When it comes off an existing experimental, it is not so easy.
Besides, I think the dataplate was removed from the pan to comply with
the letter of the law, so there is no chance of it being considered a
certified engine (even though it has 100% certified parts, and has 300
hrs of proven operation)