Rotax 916

admin can explain,

for us ....

its (916 Only available on request)??

Rotax is about ready to roll out its new 916 engine and it will soon be available in uncertified form as a powerplant choice for Experimental ...

ROTAX factory makes many different custom engines that are rebranded for OEMs. This one is a private order item for a government agency - it is not available to the public, and not expected to be made available to the public in the future. As you were! ?

Probably just a modified 912 or 915 for a different mission like more customizable ECU or different displacement or reduction ratio or something. I doubt Rotax would improve on their engines and not release it to the public which is why it's probably just for a different (more custom) mission that would be of no use to us.

I googled type certification information for it (because iSc means certified) and found a German forum ask the same question you did: https://www.pilotundflugzeug.de/forum/2020,07,22,12,1639710

According to Wikipedia's link to EASA's type certificate on the 916, it's basically the same as 915 but has a max horsepower of almost 160 instead of 141 at 5800 rpm. Same max continuous of 135.

I am guessing it's for a military application, like a drone.