While the MiG 21 is a thirsty beast, the max range is given at a considerably more economical cruising speed of about 880km/h. Also, the 1100km max (typical) ra

While the MiG 21 is a thirsty beast, the max range is given at a considerably more economical cruising speed of about 880km/h. Also, the 1100km max (typical) range is given without the external fuel tanks, so carrying only 2600L fuel. Considering this cuts the fuel cost to about 25% of your figure. It's also worth noting that if you did fly at top speed, the primary expense would not be fuel, but engines. To put some perspective on it, with the R-25 engine of the MiG 21bis, the aircraft is limited to one minute of full afterburner in training and three minutes in wartime. The engine is subsequently removed and inspected. While I can't find figures for the R-11 engined MiG 21, I suspect that it too will run out of both fuel and engine in just a few minutes if you were to push it that hard.