Deck structure (4) with passenger couches (43 each).
Pegasus during atmospheric re-entry uses the LH2-cooled plug nozzle as a heat shield. The ballistic transport would convey 172 passengers and freight 7,456 miles (12,000 km.) in 39 min. without exceeding an acceleration of 3g during ascent or re-entry. At the arrival spaceport it would hover on rocket thrust during a soft landing in the vertical attitude.
Pegasus Passenger Compartment
Four-level passenger access doors (3);
Stairways (2) connecting four passenger decks;
Double-wall acoustic damping structure;
Luggage racks (9);
Re-entry stabilization fins (2).
Text from Frontiers of Space by Philip Bono & Kenneth Gatland, 1969