See if the engine is placed in/on the tail. This means that the engine is somewhat part of the tail, and it connects it. If it is, it’s very likely that the aircraft is a DC-10 or MD-11, as it is one of the very few aircraft with this distinct style. Verify this and see if there are 2 other engines below the wings. [2] X Research source Be careful to correctly differentiate a DC-10 and MD-11 from a Lockheed L1011 Tristar. The Tristar’s engines don’t fully go passed the tail, and the engine sort of “closes” as it reaches the tail. See if the engines are placed directly in front of the tail on the body of the aircraft. [3] X Research source This means that the engine is connected to the body of the aircraft, very close to the tail. If you do see it, it’s most likely an MD series or a Dc series aircraft. Some private jets also have the engines mounted on the body, so be sure to not only look at one aspect and immediately claim it is. See if the plane has 4 engines. The DC-8 has 2 engines on each side. The DC-8 looks are similar to an Airbus A340.
Winglets help stabilize an aircraft. Most airplanes built in the 20th century don’t have winglets.
See if the engines on the wing are large but short. On a DC-10, DC-8, and MD-11, the engines mounted on the wings form almost a regular cylinder. Its height and length are almost the same. See if the engines mounted on the body are short but long. On MD and DC models, the air intake of the engines is small compared to regular commercial aircraft, but lengthwise, it’s actually a bit longer compared to similar aircraft. The engines sort of form a tube. [6] X Research source
Boeing is one of the only large aircraft carriers that have the back gears visible after takeoff. The gear retracts into a compartment, but there is no “door” to hide it.
See if the plane has a double-bogey, or 2 pairs of tires on each side. [7] X Research source Look from side view and if you see 2 sets of gear, it might be a DC-10 or DC-8. Comparing to other long-haul aircraft, the 3 models have very little gear. This just means that there is See if the airplane has 2 sets of gear, the same as the DC-10 and DC-8. However, if you notice an extra pair of gear located between the 2 back gear (in the middle of the aircraft), it’s likely the airplane is an MD-11. See if there is only one set of tires on each side. If there is only one, it’s possible that the aircraft is an MD or DC series.
See if the side window pane has a very sharp angle, forming an acute angle. If it does have a very sharp angle at the side window, it’s possible that the aircraft is a DC-10 or MD-11. See if the side window pane is an obtuse angle or an angle over 90 degrees. It should have a straight vertical pane and a diagonal side pane. If it does, it’s possible it’s a DC-9, DC-8, or MD series aircraft. Boeing and Airbus have different cockpit windows. Airbus’s forms almost an exact 90-degree angle, and Boeing’s forms an acute angle.
See if the tail cone is round or curved, similar to every other aircraft. If it is, it’s probable that the aircraft is a DC-9, DC-10, or MD-11. This isn’t the best way to identify if the aircraft is a McDonnell Douglas. The best and most reliable way is to look at all the aspects and see if all or most of them match. See if the tail cone is flat, and isn’t round. [8] X Research source From the side view, if the cone does not form a round or curved edge. It should be flat and skinny. If it is, it’s possible that it’s an MD series. See if the tail cone is in-between, which means that it’s just right. It’s not flat or round, which means that it is flat and round. If it is, it’s possible that the aircraft is a DC-8.
The DC-9’s nose is round but comes at a sharp angle. Or, in a simpler way, the DC-9 has a blunt nose but is quite long compared to aircraft its size. [9] X Research source The nose meets the cockpit at a sharp angle, and its nose is round and blunt. The DC 10’s nose is round and blunt the whole way. The cockpit window meets the nose at no big angle. It sort of “connects” making the cockpit look as if it’s part of the nose. [10] X Research source The MD-11 has a nose shape very similar to a DC-10’s but just pointier. It also closely resembles an Airbus’s. The MD Series aircraft has a nose shape very similar to a DC-9’s (so it does come at a sharp angle, the nose it longer, etc. ), but the nose is pointier and less blunt. The DC-8 has a very sharp nose. The bottom is considerably flat, but the top comes down at a sharp angle and it makes the nose very sharp and illusionally long.
See if the aircraft has a yoke, or a “U” shaped steering wheel very visible in front of the two seats: captain’s and first officer’s. If it doesn’t, it’s definitely not a McDonnel Douglas made commercial jet. If it does, it’s possible it is an MD.
DC-8 DC-9 DC-10 MD-11 MD-81 MD-82 MD-83 MD-87 MD-88 MD-90
When at an airport, just go to the attendant at a specific gate and ask her what model aircraft S/he’s handling. They’ll probably have a knowledge of it and tell you. Remember that sometimes it’s best to ask the crew that’s in charge of the gate or has definite knowledge of the airplane. There are many people you can ask, including pilots you spot or just crew members working. Remember that they probably have more knowledge than you if you aren’t an aviation geek, so don’t doubt them because you feel like it. If onboard, just request the flight attendant and ask what model aircraft you’re on. S/he will most likely give you a clear explanation. It’s most likely that the crew is right; they probably flew on that aircraft for months or even years, so don’t doubt them if you aren’t an expert or don’t have a lot of proof.
