According to our discussion the design is almost as same as of B707 and still we have the same speed. Definitely there is incredible increase in safety, other equipments to help pilots and passenger but basics are the same.
Probably in FLIGHT magazine of 1967 that McDonnell Douglas designed a spacecraft type aircraft that would have speed 17,000 mile an hour and estimated flight time between United States and SYD would be 17 minutes (If I remembered correctly), second article again in FLIGHT magazine where an egg shaped aircraft was designed capable of vertical Take off and Landing ( A huge plane, very beautiful, propellers on four corners)
So, what do you think would there be any change in basic design or configuration in near future. In my opinion probably this type of change will not occur in next 30 - 50 years.
Because due to advancement in technology, the requirement of very high speed is not worth as compared to investment required to build such aircraft.
What's your opinion?