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Old 21st Jan 2014, 01:20
  #86 (permalink)  
Two_dogs
 
Join Date: Aug 2000
Location: (Not always) In front of my computer
Posts: 349
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.
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