Aero A.11
| Aero A.11 | |
|---|---|
|
|
| Type: | Multipurpose aircraft |
| Design country: | |
| Manufacturer: | |
| First flight: |
1925 |
| Number of pieces: |
~ 440 |
The Aero A.11 was a two-seater biplane made by the Czech company Aero, továrna letadel Dr. Kabeš from Prague, which was used for both civil and military purposes.
history
.JPG)
The machine was, although the lower type designation does not initially suggest it, a further development of the Aero A.12 . Due to its successful construction, it was manufactured in several variants from 1923. So it was possible to equip the machine with different engines without any problems. A total of around 440 machines in different versions were manufactured.
The machine was popular with pilots because of its robustness and reliability. For the time, the A.11 was also considered to be a fast and agile aircraft, with which some records were also set. In September 1925, an A.11 set the Czech record in continuous flight with 13 hours and 15 minutes. In 1926, Vilem Stanovský and František Simek used an Ab-11 machine ( registration number : L-BUCD) to fly to 23 countries in 91 hours and 52 minutes, covering over 15,000 km. Aero's chief pilot, Josef Novák, set a very special record with an A.11HS in 1927 - he flew 225 loops within 45 minutes.
construction
The fuselage and wings of the Aero A.11 consisted of a fabric-covered wooden structure. The two wings were of different lengths, only the upper and longer surface was equipped with ailerons . The crew sat in two open cockpits. The undercarriage consisted of a main undercarriage, sprung by means of a rubber cord, the two wheels of which were connected to a rigid axle, and a rigid grinding spur.
variants
The most important versions of the 22 variants of A.11 are:
- Aero A.11HS
- This version, built as an export model for Finland (used there as a reconnaissance and training machine) differed from the standard type in that it had the more powerful Hispano-Suiza 8Fb (300 HP) and the necessary reinforcements for the engine mounts.
- Aero A.11N
- A model, constructed like the basic version A.11, but with night reconnaissance equipment.
- Aero Fig.11d
- Light bomber derived from the A.11N, powered by a 240 hp Breitfeld Daněk Perun II engine .
- Aero from 11N
- Like the figure 11d, but in a light night bomber version.
- Aero A.21
- This machine corresponded to the A.11 and was designed as a training machine for night flight and with a Breitfeld-Daněk-Perun-I engine with 180 hp.
- Aero A.22
- Civilian transport version of the A.11, with the rear cockpit offering space for two passengers; the drive was provided by a Maybach type Mb IV A with 240 hp.
- Aero A.25
- Training aircraft with the 185 hp BMW IIIa engine.
- Aero A.29
- 9-meter-long floatplane version with a 240 HP Breitfeld Daněk Perun II engine.
- Aero A.125
- The A.125 was basically identical to the A.25 and was also used as a training machine, but was equipped with the 180 hp Breitfeld Daněk Perun I.
Military users
Technical specifications
| Parameter | Data of the Aero A.11 (basic version) | Data of the A.21 | Data of the A.22 | Data of the A.25 | Data of the A.29 |
|---|---|---|---|---|---|
| Construction year | 1924 | 1926 | 1924 | 1925 | 1926 |
| crew | 2 | 1 | 1 + 2 passengers | 2 | |
| length | 8.20 m | 8.1 m | 9 m | ||
| span | above 12.78 m, below 10.80 m | 12.8 m | 12.3 m | 12.8 m | |
| height | 3.10 m | ||||
| Wing area | 36.51 m² | 36 m² | 36.9 m² | 36.2 m² | 36.5 m² |
| Wing loading | 40.7 kg / m² | 37 kg / m² | 38.5 kg / m² | 35 kg / m² | 45.7 kg / m² |
| Empty mass | 1030 kg | 1018 kg | 1105 kg | 985 kg | 1298 kg |
| Takeoff mass | Max. 1537 kg | 1328 kg | 1415 kg | 1270 kg | 1677 kg |
| drive | a six-cylinder engine Walter W-IV with 240 PS (177 kW) |
a BD Perun I with 185 PS (136 kW) | a Maybach Mb.IV with 260 PS (191 kW) | a BMW IIIa with 185 hp (136 kW) | a BD Perun II with 240 PS (177 kW) |
| Top speed | 214 km / h | 170 km / h | 201 km / h | 160 km / h | 196 km / h |
| Cruising speed | 180 km / h | 140 km / h | 175 km / h | 125 km / h | 150 km / h |
| Rise time | 21.50 min at 5000 m altitude | 21.20 min at 3000 m altitude | 12.30 min at 3000 m altitude | 47.50 min at 5000 m altitude | |
| Service ceiling | 7600 m | 6500 m | 7000 m | 6500 m | 6700 m |
| Range | Max. 750 km | ||||
See also
literature
- AERO - compilation of aviation. Volume 2
