Waco Model 9
| Waco Model 9 | |
|---|---|
|
|
| Type: | Light aircraft |
| Design country: | |
| Manufacturer: | |
| First flight: |
1925 |
| Production time: |
1925-1927 |
| Number of pieces: |
276 |
The Waco Model 9 (also Waco 9 had) a double-decker - light aircraft of the US manufacturer Advance Aircraft Company , of its aircraft under the trade name Waco marketed. The aircraft, of which over 270 were sold between 1925 and 1927, brought the company its first commercial success.
history
The Waco 9 was presented to the public in April 1925, after which 30 aircraft could be built and sold in the first four months of series production. The performance of the Waco 9 was described as one of the best of its time.
Two copies of the first Waco 9 series took part in the first Ford Air Tour in 1925 . Later that year, several machines competed in the various OX-5 races held across the United States. The 1926 version of the Waco 9 had modified ailerons which now used horn compensation and a slightly modified landing gear. Three machines of this year of construction took part in the Ford Air Tour in 1926 and finished the competition in places 4, 5 and 6. Of the three aircraft, two were with a six-cylinder Curtiss C-6 engine with 160 hp and one with the 150 hp powerful Hispano-Suiza-8Aa engine (Hisso A). Optionally, Curtiss OXX-6 engines with 100 hp could also be installed.
In the National Air Races in 1926, 14 Waco 9 took part. The pattern was also used by the Barnstormers of the time. It was also used as an agricultural aircraft and in the early airlines. The latter included Clifford Ball's Skyline Transport Company , which later became Capital Airlines, and the Embry-Riddle Company .
The Waco 9 received the type approval (Approved Type Certificate) required since the beginning of 1927 in July 1927 under the number ATC # 11. This year 65 machines were made. The US Army Air Corps (USAAC) used a Waco 9 in April 1927 as a rupture cell to determine the static load-bearing capacity of the construction, whereby the requirements of the USAAC could be exceeded. In 1927, production of the Waco 9 was cut back in favor of the new Waco 10, and the purchase price was reduced from an initial 2500 to 2025 US dollars.
The following were produced: 1925: 47 copies, 1926: 164, 1927: 65.
The National Air and Space Museum has a Waco 9 built in May 1927 ( registration number N452, serial number 389).
construction
The Waco 9 was a three-seater, open biplane and at the beginning of development was equipped with a 90 hp Curtiss OX-5 engine. The two passengers sat next to each other in the front cockpit while the pilot took the rear seat. The fuselage structure consisted of a framework made of welded steel tubes, which was rounded off with strips of wood and covered with fabric.
The wings had a slight positive staggering and had about the same span above and below. Its structure consisted entirely of wood and was also covered with fabric. From 1926 onwards the ailerons had an aerodynamic compensation in the form of so-called "elephant ears" at the outer ends. The chassis with a grinding spur had a continuous axle. The water cooler hung freely in the air flow centrally under the leading edge of the upper wing, which was a typical feature of Waco biplanes for a few years.
Technical specifications
| Parameter | Data with OX-5 engine |
|---|---|
| crew | 3 |
| length | 7.09 m |
| span | 9.63 m (above), 8.95 m (below) surface depth: 1.59 m |
| height | 2.82 m |
| Wing area | 26.9 m 2 , Aeromarine profile |
| Empty mass | 599 kg |
| Takeoff mass | 953 kg |
| Top speed | 147 km / h |
| Cruising speed | 126 km / h |
| Landing speed | 56 km / h |
| Service ceiling | 3660 m |
| Range | 620 km |
| Tank capacity | 140 l |
| Engines | 1 × Curtiss OX-5 eight-cylinder V-engine with 90 PS (66 kW) |
See also
literature
- Joseph P. Juptner: US Civil Aircraft Series Volume 1 , Aero Publishers, 1962, pp. 40-43
Web links
- WACO 9 on airandspace.si.edu (accessed on May 25, 2018)
Individual evidence
- ↑ Joseph P. Juptner, 1962, p. 41