Identify by helicopter characteristics

The OH-1 can best be described as an Agusta A129 with a shrouded tail rotor and the flat canopy windows of the AH-1 Cobra. The gear is fixed.

This Russian helicopter comes in versions with skids or a tricycle wheeled gear. It has two engines, a four blade main rotor and a two blade tail rotor. Typical are the horizontal stabilisers seemingly welded to the underside of the tail boom, with large end plates acting as vertical stabilisers.

The SKYe SH09, now as AW09 the smallest helicopter in the Leonardo (AgustaWestland) line-up, has a shrouded tail rotor that is big compared to the tailboom and tail. Additionally, the AW09 has a 'standard' tube skids, a five blade main rotor and all glass cockpit doors. (photo: Kecko/WikiMedia)

The AW101, formerly known as EH101, has three engines, one on the hub on top of the fuselage, and one on each side of it. Additionally, it has small sponsons in which the two wheel main gear retracts. The main rotor has five blades that widen towards the tip. Finally, the tail rotor is on the left side, with a low horizontal on the opposite side.

The A109 is a sleek looking helicopter, often with a single wheel retractable gear, but there are also fixed gear and skid versions. The nose gear does not fully retract. Another typical feature is the very pointed tail cone.

Basically, the AW119 is a single engine version of the AW109 with skids instead of a wheeled gear. So it also has a similar fuselage and tail boom, including its pointed end. Although having one engine, it has exhausts on both sides of the gear box hub.

This family has members of different sizes, here the largest AW189 is shown, but the basic appearance is the same. The most typical features are the bent up tips of the horizontal stabilisers.

The fuselage shape of the Bo-105 is typical: rounded on al sides. A narrow tail boom extended from the top rear of it, curving to a vertical stabiliser at the end. The horizontal stabilisers have rectangular end plates. The main rotor have four blades, and the tail rotor two.

This twin engine helicopter was first developed as the BK117. Its key features are a four blade main rotor and a two blade tail rotor. The outer vertical stabilisers, actually end plates of the horizontal stabilisers, are very big, and even larger than the middle vertical stabiliser. Later it was merged with the forward fuselage of the EC135 to create the EC145.

This is one of the smallest tandem helicopters. Both rotors have only two blades. The fuselage mainly consists of a cabin at the front and an engine compartment in the back. It has a fixed tricycle gear.