I still have my DC-6-7 note book with all my flt plans between cities, fuel loads, pref. alts, fuel burn (3&4 engine) alt fuel, etc. Flt plan A/S was 235 for the "6", 257 for the "7".CV- 440 - 200 + your alt. Everybody else went to breakfast, you did the flt. plan. Those were the days.............