Definition of mainplane in US English:

mainplane

noun

  • A principal supporting surface of an aircraft (typically a wing), as opposed to a horizontal stabilizer.

    • ‘The coolant radiators were in the mainplane leading edge between the engines and the fuselage.’
    • ‘The aircraft features ailerons on the rear mainplanes, but has electric flaps on both sets of planes.’
    • ‘The car has front and rear diffusers for overall down force with an adjustable carbon mainplane rear wing.’
    • ‘Conversion involved; replacing the upper, and lower mainplanes with scratchbuilt narrower chord wings.’
    • ‘Now staff are preparing the centre section and hull for relocation to Point Cook where the mainplanes are being restored.’

Pronunciation

mainplane

/ˈmānplān/