what is it?
The Junkers J 21 (manufacturer's sales designations T 21 and H 21) was a reconnaissance aircraft designed in Germany in the early 1920s and produced in the Soviet Union at the Junkers plant at Fili for use by the Soviet Air Force.
How to recognise it: 1 engine · 10.7 m wingspan
base stats
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 103 years ago, in 1923.
- Top speed is 1.7× a car on the Dutch motorway (130 km/h).
- Wingspan of 10.7 m: about 2 cars parked nose to tail.
spec sheet
- first flight
- 1923
- number built
- 120
- role
- reconnaissance aircraft
- origin
- 🇩🇪 Germany
- makers
- Junkers
- engines
- 1× BMW IIIa
- length
- 7.9 m
- wingspan
- 10.7 m
- max take-off weight
- 1,225 kg
- top speed
- 217 km/h
- range
- 750 km
Specs are for the version in the Wikipedia article's specification section. Blank means the sources don't say.
Sources: Wikidata Q315449, Wikipedia: Junkers T.21 (CC BY-SA 4.0).Updated 2026-10-24.