Military Factory logo
Icon of F-15 Eagle military combat fighter aircraft
Icon of Abrams Main Battle Tank
Icon of navy warships
Icon of AK-47 assault rifle

Aero A.11

Day and Night Reconnaissance / Multi-purpose Aircraft

The Aero A.11 was a multirole biplane airframe that saw several major variants produced for its time in the air.
Authored By: Staff Writer | Edited: 6/21/2018
National Flag Graphic


Year: 1925
Status: Retired, Out-of-Service
Manufacturer(s): Aero Vodochody - Czechoslovakia
Production: 250
Capabilities: Reconnaissance (RECCE);
Crew: 2
Length: 26.90 ft (8.2 m)
Width: 41.99 ft (12.8 m)
Height: 10.17 ft (3.1 m)
Weight (Empty): 2,381 lb (1,080 kg)
Weight (MTOW): 3,395 lb (1,540 kg)
Power: 1 x Walter W.IV 8-cylinder liquid-cooled engine developing 240 horsepower and driving a two-bladed propeller at the nose.
Speed: 149 mph (240 kph; 130 kts)
Ceiling: 24,934 feet (7,600 m; 4.72 miles)
Range: 466 miles (750 km; 405 nm)
Rate-of-Climb: 751 ft/min (229 m/min)
Operators: Czechoslovakia; Finland
The Aero A.11 was a successful multirole performer for the Czech Army Air Force during the interwar years separating the two World Wars. Equally respected for its adaptability and capability, the A.11 was designed from the outset as a multi-purpose airframe to replace the aging series of aircraft still in service at the time. In the end, the Aero A.11 would see no fewer than 20 different variant types, owing much to the inherently adaptable design envisioned when the aircraft first flew in 1925.

The A.11 was of traditional biplane arrangement featuring an over and under primary wing element. It maintained World War 1-era fighter traits such as open-air cockpits and fixed undercarriage. The crew numbered two with the pilot and his observer / gunner seated in tandem within the slab-sided fuselage. The upper wing element was fitted just ahead and around the pilot with the single liquid-cooled engine mounted forward of this (driving a two-bladed propeller unit).

A single 7.7mm Vickers Machine Gun in a fixed, forward-firing mounting was fitted for attack and managed by the pilot. The rear gunner had access to a 2 x 7.7mm Lewis Machine Gun pairing atop a flexible mounting. A modest bomb load of 441lb could also be carried for attack sorties.

The engine of choice became the Walter W IV series engine of 240 horsepower. Performance included a maximum speed of 150 miles per hour, a service ceiling of 25,000 feet and a range out to 470 miles. Rate-of-climb was 751 feet -per-minute.

The Aero A.11 was seen in its typical twin-seat reconnaissance platform but was equally adept in the role of day (as the Ab.11) or night (as the A.11N) bombing. Another notable variant was the A.11HS, an export version shipped off to Finland - the only other operator of the series. Eight were used by the Finns up until World War 2 in 1939. By the 1940s the line had all but been discarded.


1 x 7.7mm Vickers machine gun in fixed, forward-firing mounting.
2 x 7.7mm Lewis machine guns on trainable mounting in rear cockpit.

Up tp 441lb of conventional drop stores.

Graphical image of an aircraft medium machine gun
Graphical image of an aircraft conventional drop bomb munition

Variants / Models

• A.11 - Base Designation
• Ab.11 - Day Light Bomber
• A.11HS - Finnish Export Model Designation
• A.11N - Night Bomber
Site Disclaimer  |  Privacy Policy  |  Cookies  |  Site Map Site content ©2003-, All Rights Reserved.

The "Military Factory" name and logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT

Part of a network of sites that includes, GlobalFirepower, a data-driven property used in ranking the top military powers of the world, and, the World Directory of Modern Military Aircraft.

Facebook Logo YouTube Logo