Originally Posted by
Shaggy Sheep Driver
That may be so WHBM, but the fact remains that dH planned for a lot more than 90 seats with their 121 as they were anticipating growing demand in the industry. You don't plan for 'now', you plan for the future.
As Boeing did with the tri jet that did take the world market.
The typical seating config for the Boeing 727-100 in the 1960s for US carriers (the bulk of deliveries) was F10 Y85. So much the same. They put more in later by squeezing up the seats, but so did everyone else. That was the standard of the time. Dan-Air had to install extra overwing exits when they put them into IT service.