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Boeing F2B (Model 69)


Carrier-Based Biplane Fighter


Aviation / Aerospace

1 / 1

In all, some 33 of the Boeing F2B type were constructed including its sole prototype example.



Authored By: Staff Writer | Last Edited: 2/13/2018 | Content ©www.MilitaryFactory.com
The Boeing F2B biplane fighter served the United States Navy in a carrier-based fighter role. It was produced in over two dozen examples and did not see service beyond the United States. Developed from the Boeing PW-9, the F2B was a sound, dual-role fighter that provided a capable solution to the American carrier wings throughout the 1920s. This aircraft also proved the mount of choice for the U.S. Navy's "Three Sea Hawks" aerobatic team which typically tied its three F2B biplanes together for close formation flying - the group became known as the "Suicide Trio" for obvious reasons.

Origins of the F2B lay in testing done on a single ("one-off") experimental offshoot of the Boeing PW-9 fighter. The experiment was designated "FB-6" and known by Boeing as "Model 54". From this came the Boeing "XP-8" (Model 66) which was eventually tested (and passed on) by the U.S. Army and developed into a suitable design for the U.S. Navy. The PW-9 airframe was mated to a Pratt & Whitney R-1340-B "Wasp" series radial engine of 450 horsepower which promised the line improved performance over the original. When the U.S. Navy need arose for a new modern biplane fighter, the Model 69 arrived to fulfill just that role. The biplane wing arrangement was retained as was the twin-wheeled undercarriage with tailskid. The pilot sat under and slightly behind the upper main wing assembly in the typical open-air cockpit of the period with the engine ahead in the forward fuselage. While a spinner was added to the engine's frontal face in the prototype, this feature was dropped on the production models that followed. Standard armament became 2 x 0.30 caliber machine guns fitted over the engine and synchronized to fire through the spinning propeller blades though this could also be replaced by a combination 1 x .30 caliber and 1 x 0.50 caliber heavy machine gun arrangement for additional punch. The lower wing assembly was also wired for the carrying, and delivery, of conventional drop ordnance. In this fashion, the Model 69 could serve double-duty as fighter and fighter-bomber aboard U.S. carriers.

First flight of the Model 69 (as the U.S. Navy prototype "XF2B-1") was on November 3rd, 1926. Following the requisite period of testing, the aircraft was formally introduced by the U.S. Navy as the Boeing "F2B" on January 20th, 1928. The initial order was for 32 first-batch aircraft to be designation "F2B-1" and operational service began aboard the deck of the USS Saratoga (CV-3) - a soon-to-be World War 2 veteran.


In practice, the F2B was a very solid design and capable carrier-based fighter for its time, possessing the required agility and power. In the finalized configuration of the aircraft, the fighter was capable of reaching speeds near 160 miles per hour and cruised at around 130 miles per hour. Range was a handy 315 miles which was a key quality for aircraft usually called to operate far from land-bases for refueling and rearming. Its service ceiling peaked at 21,500 feet and rate-of-climb was 1,900 feet per second. Weights included 2,000lbs when empty and 2,800 under its Maximum Take-Off Weight (MTOW). The Pratt & Whitney R-1340-8 Wasp radial piston engine developed 425 horsepower, providing the necessary thrust to propel the F2B from carrier decks. Browning M2 heavy and M1919 medium machine guns made up its standard fighter armament while 5 x 25lb bombs could be slung under the lower wing section for strike sorties.

Boeing also developed the Model 69B of which two were produced and one each sent to the nations of Brazil and Japan for evaluation. However, the type was not taken up by either country. Additionally, the United States Navy did not order any more F2B fighters beyond its original stock order for 32 aircraft.

Such ended the story for this Boeing carrier-based fighter. Including the single prototype, 33 aircraft of the line were completed.


Specifications



Year:
1928
Status
Retired, Out-of-Service
Crew
1
[ 33 Units ] :
Boeing - USA
National flag of Brazil National flag of Japan National flag of United States Brazil (1); Japan (1); United States
- Fighter
- Ground Attack
- Close-Air Support (CAS)
- Navy / Maritime
Length:
22.90 ft (6.98 m)
Width:
30.09 ft (9.17 m)
Height:
9.22 ft (2.81 m)
(Showcased structural dimension values pertain to the Boeing F2B-1 production model)
Empty Weight:
1,984 lb (900 kg)
MTOW:
2,811 lb (1,275 kg)
(Diff: +827lb)
(Showcased weight values pertain to the Boeing F2B-1 production model)
1 x Pratt & Whitney R-1340-8 Wasp air-cooled radial piston engine developing 425 horsepower.
(Showcased powerplant information pertains to the Boeing F2B-1 production model)
Max Speed:
158 mph (255 kph; 138 kts)
Service Ceiling:
21,506 feet (6,555 m; 4.07 miles)
Max Range:
311 miles (500 km; 270 nm)
Rate-of-Climb:
1,890 ft/min (576 m/min)
(Showcased performance values pertain to the Boeing F2B-1 production model; Compare this aircraft entry against any other in our database)
STANDARD:
1 x 0.50 caliber Browning M2 heavy machine gun AND 1 x 0.30 caliber Browning M1919 medium machine gun OR 2 x 0.50 caliber Browning M2 heavy machine guns.

OPTIONAL:
5 x 25lb conventional drop bombs under the lower wing assembly.
(Showcased armament details pertain to the Boeing F2B-1 production model)
XF2B-1 - Single prototype model
F2B-1 - Production model designation for United States Navy.
Model 69B - Export model based on F2B-1; two examples, one delivered to Brazil and the other to Japan.
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