Lonewolf, I have a vague recollection of those plans. If memory serves the two-part propellant idea was grand from the perspective of preventing explosions, but the stuff was both corrosive and toxic. In the end the negatives outweighed the positives and the idea was abandoned for much the same reasons that hypergolic fuels were abandoned by the Army and USN. USAF uses hydrazine in their F-16s. The presence of hydrazine was one reason the F-16 could never make it to a USN carrier deck and why (among other reasons) the YF-17 was chosen by USN over the YF-16. The YF-17 then became the F/A-18.