what is it?
The Aero A.21 was a biplane military trainer aircraft developed in Czechoslovakia from the Aero A.11 reconnaissance-bomber. The aircraft was developed specifically as a night-trainer, to teach Czech Air Force pilots instrument flying techniques.
How to recognise it: 1 piston engine with propeller · 12.8 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
- Wingspan of 12.8 m: about 3 cars parked nose to tail.
piston: A car-like piston engine turning a propeller: simple and cheap, the classic small plane.
spec sheet
- first flight
- —
- number built
- 8
- role
- night trainer aircraft
- makers
- AERO Vodochody Aerospace
- engines
- 1× Breitfeld & Danek Perun I
- crew
- 2
- length
- 8.1 m
- wingspan
- 12.8 m
- height
- 3.2 m
- max take-off weight
- 1,240 kg
- top speed
- 170 km/h
- cruise speed
- 150 km/h
- range
- 340 km
- ceiling
- 6,500 m
Specs are for the version in the Wikipedia article's specification section. Blank means the sources don't say.
family
Sources: Wikidata Q2650803, Wikipedia: Aero A.21 (CC BY-SA 4.0).Updated 2026-10-24.
