Re: ST III's "Transwarp drive"
I'd like to believe that these terrible bumpers of the Enterprise-B
had been added to test new transwarp components / improve the previous transwarp mechanism.
Once transwarp technology had been refined and reduced in size, those bumpers came off and thus explain the appearance of the "B" on the TNG's conference room sculpture wall.
"The first duty of every Starfleet officer is to the truth, whether it's scientific truth or historical truth or personal truth! It is the guiding principle on which Starfleet is based! Jean-Luc Picard