A Merchantman aircraft features as one of the characters in the novel 'The Damocles Plot' by Julien Evans. Here's a couple of excerpts:
Tonight the autopilot was behaving itself (it frequently didn't). Zulu Charlie rode out the turbulence well enough, the flight deck 'nodding' in the way peculiar to Merchantmen freighters. Converted from Vanguard passenger airliners in the early seventies, the Merchantmen had had their floors strengthened to withstand loading with cargo pallets, but a side effect was that the modified fuselage structure was more rigid. In rough air the floor bounced like a diving board.
'Glideslope.'
'Check,' responded Park. 'Gear down, approach flap. Final checks.'
Zulu Charlie intercepted the glideslope and both pilots heard the altitude lock disengage.
'Land flap,' called the copilot.
Jagger moved the lever, watching the gauge. It was slightly blurred. Must go to the optician tomorrow.
'Land flap you have,' he said. 'Checks complete.'
For a propeller-driven aircraft the Merchantman was quite a mover. Its four Rolls Royce Tyne turboprop engines dragged the sixty ton freighter through the air at three hundred and thirty-five knots, almost four hundred miles per hour. At full blast each engine turned its propeller with the power of five thousand horses. Even when throttled back in the cruise the huge props spun fast enough for the blade tips to nudge the speed of sound. In the time it took for Sarah to say, 'There goes Santiago. Next track is two two zero', the aircraft had put another half mile behind it.