Complex sentence: A tricycle undercarriage was fitted, following Navy preferences, with the nosewheel retracting forwards and the single-wheel main legs into coverless fairings in the wings, so that the sides of the wheels could be seen even when retracted.
Split into simpler sentences: A tricycle undercarriage was fitted, with the nosewheel retracting forwards. The single-wheel main legs into coverless fairings in the wings, so that the sides of the wheels could be seen even when retracted.