avia.wikisort.org - Aeroplane

Search / Calendar

The Boeing XP-4 was a prototype United States biplane fighter of the 1920s that was grounded permanently after just 4.5 hours of flight testing.[1]

XP-4
Boeing XP-4 during trials
Role fighter
National origin United States
Manufacturer Boeing
First flight 1927[1]
Number built 1
Developed from Boeing Model 15

Development and design


In 1926, the United States Army was very interested in the turbo-supercharger as a way of improving engine performance, and requested that one be added to the last of the PW-9s, and the engine upgraded to a 510 hp Packard 1A-1500. This machine was designated XP-4.[1]

In addition, the basic PW-9 armament of one .50 and one .30 cal. machine guns in the nose was supplemented by two added .30 cal. guns mounted under the lower wing, far enough out to be outside the propeller arc (thus not needing synchronization).[2]

All these modifications added weight, so the lower wing span was extended by 9.5 feet.

The airplane was delivered to Wright Field for testing on 27 July 1927, but it quickly became apparent that the Packard engine did not have sufficient power to compensate for the 800 lbs of extra weight, the craft performing more poorly than its predecessor, and the project was quickly abandoned.[1]


Specifications (XP-4)


Data from Fighters of the United States Air Force [3]

General characteristics

Performance

Armament


See also


Related lists


References



Notes


  1. Angelucci 1987, pp. 71–72.
  2. Jones 1975, pp. 20–22.
  3. Dorr and Bishop 1990, pp. 33–34.

Bibliography





На других языках


- [en] Boeing XP-4

[fr] Boeing XP-4

Le Boeing XP-4 est un prototype de chasseur biplan américain des années 1920 qui est cloué de façon permanente au sol après seulement 4 heures et demie de vol de test[1].

[it] Boeing XP-4

Il Boeing XP-4, designazione aziendale Model 58, fu un aereo da caccia monomotore, monoposto e biplano, sviluppato dall'azienda aeronautica statunitense Boeing nella seconda metà degli anni venti del XX secolo e rimasto allo stadio di prototipo.



Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.

Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.

2019-2025
WikiSort.org - проект по пересортировке и дополнению контента Википедии