| 词条 | Pitcairn Mailwing | |||||||||||||||
| 释义 |
The Pitcairn Mailwing family was a series of mail carrier and sport aircraft produced in the U.S. from 1927 to 1931. Design and developmentThe Pitcairn Mailwings were developed by Pitcairn to carry air mail for the U.S. Postal Service. Of simple and robust construction, they also had relatively benign flying characteristics.[1] They were constructed using chrome-moly steel tube and square-section spruce spars with spruce and plywood built-up ribs. The fuselage was faired using wooden formers and covered with fabric. The tail sections were built up from steel tube and fabric-covered. The Pitcairn Mailwing had a ground-adjustable fin and in-flight adjustable tailplane, features not often seen in other aircraft.[1] The undercarriage was of outrigger type with Oleo-Spring shock absorbers and disc brakes on the mainwheels. All models looked very similar; changes were minor, with several fuselage extensions being the most obvious.[1] The mail was carried in a fireproof metal-lined compartment forward of the pilot's cockpit. The Mailwings were flown extensively by the U.S. Air Mail service from 1927 until the end of dedicated Air-Mail routes.[1] Pitcairn also built the same aircraft in sport versions for private use. These aircraft had the mail compartment removed, and a side-by-side two-seat cockpit was fitted.[1] VariantsData from: Aerofiles : Pitcairn[6]
Operators
Specifications (PA-7M Super Mailwing){{Aircraft specs|ref=Jane's all the World's Aircraft 1931[3], Aerofiles: Pitcairn[6] |prime units?=imp
|cruise speed mph=112 |cruise speed note=(PA-5)[4] |stall speed mph=45 |stall speed note=(PA-5)[4] |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |range miles=520 |range note= |ferry range km= |ferry range miles= |ferry range nmi= |ferry range note= |endurance= |ceiling ft=18000 |ceiling note=(PA-5)[4] |g limits= |roll rate= |climb rate ftmin=1100 |climb rate note=(PA-5)[4] |time to altitude= |wing loading lb/sqft=12.1 |fuel consumption kg/km= |fuel consumption lb/mi= |power/mass={{cvt|13.8|lb/hp|kg/kW}} |more performance= }} Notes1. ^1 2 3 4 {{cite book |last=Juptner |first=Joseph P.|title=U.S. Civil Aircraft Vol.2 |publisher=Aero Publishers |location=Los Angeles |date=1963 |pages=279–81 }} 2. ^{{cite web|title=Pitcairn|url=http://www.nationalaviation.org/pitcairn-harold/|accessdate=23 January 2011}} 3. ^{{cite book |title=Jane's all the World's Aircraft 1931 |editor1-last=Grey |editor1-first=C.G. |year=1931 |publisher=Sampson Low, Marston & company, ltd |location=London |page=307c}} 4. ^1 2 3 4 5 {{cite web |last1=Eckland |first1=K.O. |title=Pitcairn |url=http://aerofiles.com/_pitc.html |website=aerofiles.com |accessdate=27 December 2018}} External links
5 : United States mailplanes 1920–1929|Pitcairn aircraft|Single-engined tractor aircraft|Biplanes|Aircraft first flown in 1927 |
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