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#1440

Lockheed C-121 Constellation

🇺🇸 United States ·first flew 1947· military transport

Lockheed C-121 Constellation, photo 1 of 7
1/7 United States Air Force· Public domain

what is it?

The Lockheed C-121 Constellation is a military transport version of the Lockheed Constellation. A total of 332 aircraft were constructed for both the United States Air Force and United States Navy for various purposes. Numerous airborne early warning versions were also constructed.

How to recognise it: 4 piston engines with propellers · 37.5 m wingspan

base stats

  • speed 537 km/htop speed
  • seats 44passengers
  • size 48.5 tmax take-off weight
  • built 332made in total

Bars compare against all aircraft: 3,500 km/h, 20,000 km, 850 seats; size and number built on a log scale up to 640 t (An-225) and 45,000 built (Cessna 172).

fun facts

  • First flew 79 years ago, in 1947.
  • Top speed is 4.1× a car on the Dutch motorway (130 km/h).
  • Wingspan of 37.5 m: about 8 cars parked nose to tail.
  • Fully loaded it can weigh as much as 8 African elephants (~6 t each).

piston: A car-like piston engine turning a propeller: simple and cheap, the classic small plane.

spec sheet

first flight
1947-03-14
introduced
1948
status
retired
number built
332
role
military transport
origin
🇺🇸 United States
makers
Lockheed Corporation
engines
4× Wright R-3350-75 Duplex-Cyclone
crew
5
passengers
44
length
29 m
wingspan
37.5 m
height
6.8 m
max take-off weight
48.5 t
top speed
537 km/h
cruise speed
521 km/h
range
—
ceiling
7,450 m

Specs are for the version in the Wikipedia article's specification section. Blank means the sources don't say.

family

Sources: Wikidata Q3836000, Wikipedia: Lockheed C-121 Constellation (CC BY-SA 4.0).Updated 2026-10-24.

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