> slamming a jet fighter into a large concrete block at 481 miles per hour (775 km/h)
The post I replied to specified a 747
- F4 30,000 kg empty, 747 > 162,400 kg empty, 300,000+ max
- the F4 test had water in the fuel tanks
- F4 impact speed 775 kmh, 747 mac speed 998 kmh (probably not worse case: fully loaded, descending, thrusts on).
So a fraction of the weight, no fuel, low speed: not very reassuring