Oracle1
26th Jul 2013, 09:54
Lycoming 540 .474
A turbonormalized Continental 520 or 550 (8.5:1 compression) running Gami injectors and lean of peak cruises with a BSFC of .39 to .41 according to TAT data.
Rotax Carby .45
Rotax fuel injected claims 20 % improvement on fuel economy
which will yield high .3 's probably .38 to .39 if claims are true
BSFC is not the differential between the engines there is no such thing as a free lunch.
Where the rotax engine wins is reliability longevity and ease/cost of maintenance
It trounces the air cooled stuff in the training environment because the temps around the valve train are always stable in circuit training. I think you will find that the rotax engine is now doing more training hours than any other piston engine in Australia and its no surprise why. The only problem is it only makes 100 ponies.
A turbonormalized Continental 520 or 550 (8.5:1 compression) running Gami injectors and lean of peak cruises with a BSFC of .39 to .41 according to TAT data.
Rotax Carby .45
Rotax fuel injected claims 20 % improvement on fuel economy
which will yield high .3 's probably .38 to .39 if claims are true
BSFC is not the differential between the engines there is no such thing as a free lunch.
Where the rotax engine wins is reliability longevity and ease/cost of maintenance
It trounces the air cooled stuff in the training environment because the temps around the valve train are always stable in circuit training. I think you will find that the rotax engine is now doing more training hours than any other piston engine in Australia and its no surprise why. The only problem is it only makes 100 ponies.