In a parallel universe somewhen:

His Majesty's Aircraft “Elegant Journey”

Taxiing: Set throttle at 5% to start centre engine then alternate between Port and Starboard outer engines as follows:

To turn to Starboard, AG1 to start Port outer engine.
To turn to Port, AG2 to start Starboard outer engine.

When ready for take-off, ensure AG1, AG2 and AG3 are on (AG3 starts both inner engines)

Take-off: Apply full throttle and pull up during take-off run: Unstick occurs at 175mph. Maintain full throttle for climb.

Cruise: Reduce throttle to 80% and apply trim as needed.

Landing: Reduce throttle to 40%. For final approach, maintain 5 degree or less descent angle then cut power at 100 feet and flare gently. Once down, wait until speed drops to 70mph then apply water brakes (VTOL down).

AG4: Landing lights.

Flight crew: 4. Pilot. Co-pilot. Navigator/Radio. Flight engineer.
Cabin crew: Varies depending on role.

Built by: Maltik Offshore Industries. (Also built H.M.A. Elegant Solution)
Sponsored by : Parfleet Estuary Township.

His Majesty's Aircraft “Elegant Journey” joins the High Service as a fast passenger and mail/freight carrying flying boat, converted from a land based airframe by Maltik Offshore Industries who used their experience in hydrodynamics to make the original airframe seaworthy with minimal modifications.

Credits:

@AviownCorp: Slippery fuselage pieces.
@Komuhachi: Large engines.

Build was inspired by a picture I have seen many times while browsing, of an art-deco style 5 engined flying boat with a ludicrous centre float arrangement which appealed to my liking of absurd designs.