Incurable
The Problem isn't Ice, it's water. "In Spec." Fuel has it and at very low temps it takes shape as granular microscopic particles. As such, it does no harm. At Cruise, in VERY low temp. over many hours, the ice melts and refreezes in the FOHE. It can reaccumulate at the small bore exits to the HP's., cause cavitation and starvation, as discussed. Heating, melting at the entry and immediately refreezing downstream is the problem. Oil cooling is not necessary at this point, indeed, the Oil (mostly) bypasses the FOHE anyway., so why direct the Fuel through a periodically unnecessary Path?
The solution isn't water free Fuel, which is impossible anyway; but directing Fuel around vulnerability in the Fuel Path when it may create problems.
AF
Last edited by airfoilmod; 8th Mar 2009 at 21:03.