ORIGINAL: Gaspar
Hi John,
I concede with you that using diesel it is harder for the pump, my tests show about a 20% more power needed to the pump, that is not 3 times. The ecu don't have ANY issue in controlling the pump if the difference is of this magnitude. We see much more variations from one pump to the next. Haven't measured any real increase of thrust from one fuel to the other.
All the best,
Gaspar
Gaspar, John and those who might be interested in the subject of diesel versus kero on pump load,
I have done multiple tests on different days and times of days ranging from 62F to 85F ambient temperatures. The results have been very consistent, with 10 to 12% less pump load (or PW) on burning diesel versus kero during idle and about 5 to 7% less with diesel at full throttle, while EGT being constant (about 1% lower with diesel). Therefore, it is reasonable to assume running diesel is more fuel efficient, at least with KingTech engines, and it is an excellent choice of fuel.
Above results have been consistent to those from the factory. Gaspar, could you tell me your ambient temperature when you were doing the comparison? I wonder if it was substantially lower...? Also wondering why the lack of increased thrust from your testing with diesel, perhaps is the different formulation of diesel fuel between Spain and North America??
Regards,
Barry