>>8433111 LB
> The SR71 was built with slide rules and drafting tables
was built with a ton of taxpayer money, that many people worked very hard for
engineers got paid VERY well to play with their slide rules
military use only, little value to anyone else
general aviation still using 50yo tech to power aircraft
current aircraft from Cessna using piston engines that received their original type certificate 50+ years ago
turbine engines have changed little, slightly more fuel efficient