Jaba,
Oil changes every 25 hours and not 50...
Head torque checked every 25...
Surely in this age of technical expertise they can design a better engine than this?
I only ever flew Jabirus and other Ultralights for a very limited number of hours and could never feel at ease with the engine spinning above 5000 RPM. I realise they need this speed to produce the desired power output, and it's a case of chasing ones own tail regarding power vs weight.
Spend enough money and anything is possible.
Sorry for the link, couldn't get the Youtube link thingy to work?
https://www.youtube.com/watch?v=nsa6kq-qqIE
This video shows an operational cutaway of a BMW S1000RR — a 193HP superbike — bumping against its 14,200RPM redline. A cam and valvetrain at 118 cycles per second is an amazing sight (and sound)
Obviously not a suitable engine for an aircraft and probably has HUGE maintenance / reliability problems of it's own. However a pretty cool video to watch.