Ah yes, spool-up times.
On the 'ole B707 straight-pipe powered airplanes (JT4A-powered) the spool-up time could be as long as 15 seconds...an eternity, when on short final.
With these airplanes, configure early, and keep the engines fully spooled up was the procedure, otherwise...well, it wasn't a pretty picture.
Crews adjusted, and all went well...after proper proper procedures were in place at knowlegeable carriers.
New folks...found out, soon enough.
