Originally Posted by
Bend alot
rutan - I was taught that lead also assisted in heat removal by the unburnt fuel air mixture out of the cylinder.
It appears that for some reason the exhaust valve and its guide area are now getting and remaining hotter than they use to, given that it is not just Lyco' but also PMA cylinders and even TCM's. I can only conclude that it is pilot error in operation of engines. ( I have my AWI interview next week).
I wouldn’t expect an Air Warfare Instructor to know better (
) but to reef this back as pilot error shows a total lack of understanding of helicopter operation and engine management. This has been extant for some 18 months and change to fuel additives is clearly being associated with the failures: that they are occurring in helicopters can be attributed to the lower cooling available plus the higher power demands, which are not related to airspeed but to handling requirements in a low level environment.