42002 Hovercraft is a TECHNIC set released in 2013. It contains 170 pieces to construct a black hovercraft. The alternate model is a plane.
This is a description taken from LEGO.com. Do not modify it.
Race across land and sea in the ultra-realistic LEGO® Technic Hovercraft!
Race over land, water, mud and ice in the all-new Hovercraft! No terrain is too hostile for this highly realistic LEGO® Technic model, featuring such authentic details as a cool racing design, spinning rotor blades and an engine with real moving pistons! Build action-packed racing at its very best! This 2-in-1 model is ready to take on any outdoor adventure. Rebuilds into a super agile Plane with a spinning rotor and working piston engine.
Features cool racing design, spinning rotor blades and moving engine pistons
Race your friends!
Spin the rotor!
See the pistons move!
2-in-1 model: Rebuilds into a Plane with a spinning rotor and working piston engine. Alternate instructions only available for download on technic.LEGO.com.
Measures over 3" (9cm) high, 7" (18cm) long and 3" (8cm) wide
Plane measures over 3" (8cm) high, 10" (26cm) long and 8" (22cm) wide