Main Menu
User Menu

Military history website

Boeing XF4B-1

Boeing XF4B-1

Boeing XF4B-1
Originální název:
Original Name:
Boeing XF4B-1
stíhací letoun
DD.MM.1928-DD.MM.1928 Boeing Airplane Co., Seattle, Washington
Období výroby:
Production Period:
Vyrobeno kusů:
Number of Produced:
Model 83 (NX7133)
Model 89 (NX7134)
První vzlet:
Maiden Flight:
Základní charakteristika:
Basic Characteristics:
Vzlet a přistání:
Take-off and Landing:
CTOL - konvenční vzlet a přistání
Uspořádání křídla:
Arrangement of Wing:
Uspořádání letounu:
Aircraft Concept:
Přistávací zařízení:
Landing Gear:
Technické údaje:
Technical Data:
Hmotnost prázdného letounu:
Empty Weight:
755 kg
Vzletová hmotnost:
Take-off Weight:
1160 kg
Maximální vzletová hmotnost:
Maximum Take-off Weight:
? kg
9.14 m
6.28 m
2.93 m
Plocha křídla:
Wing Area:
21.14 m2
Plošné zatížení:
Wing Loading:
? kg/m2
Počet motorů:
Number of Engines:
Pratt & Whitney R-1340B Wasp o výkonu 336 kW
dvoulistá kovová vrtule
Objem palivových nádrží:
Fuel Tank Capacity:
Maximální rychlost:
Maximum Speed:
271.7 km/h v ? m
Cestovní rychlost:
Cruise Speed:
228.5 km/h v ? m
Rychlost stoupání:
Climb Rate:
14.8 m/s
Čas výstupu na výšku:
Time to Climb to:
? min do ? m
Operační dostup:
Service Ceiling:
8199 m
836.9 km
Maximální dolet:
Maximum Range:
? km
1x 7,62mm kulomet Browning
1x 12,7mm kulomet Browning

1x 227kg bomba (Model 89)
Uživatelské státy:
User States:
Davis, Larry. P-12/F4B in Action, In Action No.141. Squadron/Signal Publications, Carrollton 1994. ISBN 0-89747-309-4.
Bowers, Peter M. The Boeing F4B-4, Profile No.27, Profile Publications, Leatherhead.
Bowers, Peter M. The Boeing P-12E, Profile No.2. Profile Publications, Leatherhead.
Bowers, Peter M. Boeing Aircraft since 1916. Putnam Aeronautical Books, London 1989. ISBN 0-85177-804-6.
Swanborough, F. G., Bowers, P. M. US Navy Aircraft Since 1911, Putnam Aeronautical Books, London 1990. ISBN 0-85177-838-0.
Pelletier, Alain. Boeing - The Complete Story. Haynes Publishing, Yeovil 2010. ISBN 978-1-84425-703-4.
Jones, LLoyd S. U.S. Fighters. Aero Publishers, Inc. Fallbrook 1975.
United States Army and Air Force Fighters 1916-1961, Harleyford Publications, Letchworth 1961.

Boeing XF4B-1 - Model 89 již po úpravě na standardní F4B-1

Model 89 již po úpravě na standardní F4B-1
URL : : 0
Already during the tests on-board fighters XF3B-1 saw factory Boeing the possibility of further development of the design in the machine, which could replace both the naval AND F2B and AND F3B army PW-9, and soon launched from its own resources, financed the construction of two prototypes. You are in some elements differed, were, therefore, different marking. The Model 83 had a chassis with wheels on a common axis and got the grappling hook, the Model 89 had the undercarriage legs separated, and the hook missed. The looser the space between the legs of the chassis but it's allowed to hang here pětisetliberní mountain lion.

In the construction there has been no radical step, everything was just the result of further development of the already proven elements. The only major difference against the previous fighters of the company Boeing was the use of riveted aluminum skeleton, instead of welded steel. For the Model 83 (and the first of the following serial machines) however, it was motor mount and the bow is still made of steel. Wings, the previous machines with a slight arrow, was now equal, but still was wooden, with the new profile, the Boeing 106. The tail surfaces were made as poloskořepina with the use of aluminum corrugated sheet metal, as well as the F3B-1. Armament remained, of course, also the same - according to the usual practice of all machines of the series F4B / P-12 could carry either two 7.62 mm machine guns Browning, each with 600 rounds of ammunition, or one of the machine gun to replace the 12.7 mm machine gun Browning with 200 rounds of ammunition. In addition to the already mentioned 227kg bombs under the fuselage of the Model 89 was possible to place the pylons under the wings - future military machines but usually wore just practice pětadvacetiliberní bombs. Both prototypes were given the engine the Pratt & Whitney R-1340B, a power of 336 kW at 1500 m, the propeller was on the ground adjustable. Under the fuselage could carry even 55galonovou odhazovatelnou an additional tank.

Model 83 first flew in Seattle 25. June 1928 and was three days later passed to San Diego, where he underwent initial tests. The Model 89 was completed a month later and the railroad brought to the Test centre of the navy in Anacostia, where also 7. August for the first time started. Basically the same engine as the F3B-1, amounted to new machines about 35 km/h higher speed, by more than 2200 m higher service ceiling and much better climb. Both machines were officially still a civilian, bore the coat of grey colour with green accessories, and not only that they did not bear no military markings, but even their civil registration. The navy, however, both machines resulted in the records under the designation XF4B-1 and the first of them later in San Diego he got to the stern inscription For.With. Navy. The Model 83 was even publicly introduced at the National air races in Los Angeles, where he created a new record in speed climb. The second machine was after the test in the Anacostia loaned also to the military air force, that service operated on its base Bolling Field, lying actually, just on the other side of the landing area.

The result of the tests was an order for 27 of serial machines, with the factory designation of Model 99 and maritime F4B-1, and both prototypes are returned to the parent factory, where they were adjusted to this standard. Serial machines for example, should the engine R-1340C, or according to the new marking R-1340-7, which had a flatter front cover, drop the speed limit by one mile due to a higher resistance but was not significant compared with costs that would require the start-up of serial production of the "b's". The Model 83 was also modified the chassis, because the series got the chassis according to the second machine. Both machines then the navy purchased and placed by the side of the serial machines. 7. November 1928 was ordered and variant for the army air force, which was given the designation P-12 and in addition to the lack of marine equipment from the F4B-1 was not very different.

These orders were more modest, it was basically just a machine for operating tests, have become but the first of a total of 586 machines, which were built as F4B, P-12 or any of the civilian or export versions, were the last of the fighter biplanes in the service of US Army and which were in the auxiliary rolls used in the year 1941..
Boeing XF4B-1 - Model 89 v původní podobě

Model 89 v původní podobě
URL : : 0

This post has not been translated to English yet. Please use the TRANSLATE button above to see machine translation of this post.

Fotografie demonstrátoru
Boeing XF4B-1 -

URL : : 0