NA F-86 vs Saab J29 -which why?

[davparlr]

From everything I gathered it seems about right. That calculator you showed is measuring airspeed at standard no wind conditions, sure the aircraft is going to exceed Mach 1. Here's something else to look at - the U-2 flies at 60,000 feet - it had about a 10 knot window where it could start exceeding the speed of sound or stall - all at about 400 mph indicated airspeed. Certainly the U-2 is not a supersonic aircraft.

My reference shows that the FJ-4 had a top speed of 680 mph at SL, and 631 mph at 35K. The F-86H could do 680 at SL and 613 at 35k which is interesting since the F-86H has about 1000 lbs more thrust. In either the AF version or the Naval version, the F-86 is a great looking aircraft and a true classic.