Ilyushin Il-76
Of all the large (military) transport aircraft the Ilyushin Il-76 - NATO code name Candid - cannot be missed easily. While the noise produced by most versions is already phenomenal, the external appearance is also like no other aircraft. The most recognisable characteristic of the Il-76 is the glass chin under the nose (below which is a bulb with a radar). Also the landing gear is typical with four wheels on a single axis on all five legs, including the nose gear. Finally the big forward pointing bullet fairing on top of the vertical stabiliser is reminisent of the Il-62.
All four main landing gear legs have four wheels on a single axis, retracting in pods attached to the fuselage.
Different versions
How to distinguish different versions of the Ilyushin 76 will be added later.
Confusion possible with
Xian Y-20
The Xian Y-20 looks like being composed from several other types, with the wings and engines coming from the Il-76, and the tail and landing gear from the C-17. The Y-20 has a different nose though and no winglets. (photo wc/WikiMedia)
Lockheed C-141 Starlifter
Especially the wings and engines (and possibly the tail) of the Starlifter might confuse you as they look similar to those of the Il-76. However, the C-141 has no glass nose and fewer wheels on the landing gear (ten instead of twenty). Also the fuselage is narrower.
McDonnell-Douglas C-17
They are part of the same aircraft class but the differences between the C-17 and Il-76 are quite obvious: the C-17 has no glass nose, two wheels on the nose gear, winglets, separate fan exhausts for the engines and no bullet fairing on top of the vertical stabiliser.