Thryakblyak

Ladies and gentlemen, welcome aboard Thryakblyak, the landscape aerodrome station! Four bays, one swipe between them. Two puzzles, two benches.

First up, Mooring Lamps! Tap any lamp and it toggles with its four neighbours. Darken the whole array to clear the board. Sixty-four boards climb from three-by-three to seven-by-six, adding riveted cells you cannot tap, diagonal spill that flips the corners, beacon lamps that switch a whole row and column, and a tap allowance!

Next, Valve Vent! Tap a valve, then tap a highlighted cell to jump it over a neighbour. The valve you jumped is vented. End on one valve and the bay is clear. Fifty-six bays add cut-away frames, diagonal jumps and sealed valves that move but can never be jumped. Undo any move.

And now, the benches! Lift Bench takes envelope volume, gas, purity and altitude, then reports air and gas density, gross and net lift. Trim Bench takes loads and their hull stations and returns total moment, centre of gravity and trim angle against a safe band.

Every result saves to the ledger, inputs intact. Enjoy the flight!