Originally Posted by
FlyingDL4Fun
5) B737 - 2 engines, short fuselage, 1 pair of wheels on main gear
Originally Posted by
T.J. Bender
737-800 - Short, squatty aircraft with large winglets and a distinctive cockpit window pattern that narrows into small, rectangular slits. Two overwing exits.
737-700 - Visually similar to the 737-800, but shorter and has only one overwing exit.
Distinctive feature: head on, modern 737's engines nacelles are 'flat' on the bottom. This helps narrow down the genus and the above will get you species.
If you are underneath one flying overhead, the 737 has no gear doors -- you'll see wheels.