Originally Posted by
APC225
Now we're starting to see some final approach speed, just like the olden days.
"Once established on final, you adjust your speed to 155 knots, plus one knot for every 100 pounds of fuel in excess of 1,000 pounds. For example, with 2,500 pounds of fuel on board, the desired final approach speed is 155+15, or 170 knots. This speed is adjusted upward for gusty winds..." - Northrup T-38 Talon
(Northrop, not Northrup).
When they changed to the C-model, the jet got 500lbs heavier. Basic speed is now 160 and No-flap basic is 175, plus gas, as you stated.