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BMW engine aircraft suitable?
"Anyolmouse" wrote in message ... "Ralf Mueller" wrote in message ... just read about the new BMW S 1000 RR bike. The complete engine assembly is less than 60 KG. Engine puts out 193HP (112 Nm, 12,000rpm). Wouldn't that one (slightly detuned) make a nice SLA powerplant ;-)) With about a 4.8/1 reduction to the prop?? -- We have met the enemy and he is us-- Pogo Anyolmouse What kind of TBO is expected @ 12,000 rpm?? Some guy who has been playing with engines for quite awhile has a rule of thumb that says 4500 is a kind of mark for piston engines beyond which the durability starts decreasing more rapidly??? I haven't double checked this, but it makes some sense that the faster the piston engine spends the quicker it wears. There is several projects using the Yamaha 4stroke snowmobile engine that turns up around 12,000 for it's hp. Data should be available soon on their durability... |
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