| 词条 | Pratt-Read LBE | |||||||||||||||||||
| 释义 |
The Pratt-Read LBE-1 was a prototype glide bomb, or "Glomb", developed for the United States Navy during World War II. Although there were high hopes for the concept, the limitations of the Glomb led to the production contract for the LBE-1 being reduced, then cancelled, and only four examples of the type were ever built. Design and developmentLate in 1940, the United States Navy began seriously considering the possibility of developing gliders that would be remotely controlled to carry bombs to a target, reducing the risk to aircrew.[1] The concept called for the glider to be towed by an ordinary carrier-based aircraft to the target area, then released, to be guided via a TV camera in the glider's nose which would transmit signals to the carrier aircraft, an operator then using radio control to steer the aircraft to its target.[2] Considered to be feasible, the project, called "Glomb" for "Glider-Bomb", became an official program in the late spring of 1941.[1] Following trials using conversions of existing gliders that proved the concept viable, Pratt-Read was awarded a contract in September 1943 for the development of a purpose-built Glomb, designated by the navy as LBE-1.[1][2] Intended to carry between 2,000 and 4,000 pounds (910-1,800 kg) of bombs, the LBE-1 was a fairly conventional low-wing aircraft, fitted with fixed tricycle landing gear and perforated dive brakes of the type used by dive-bombers. In addition to its radio-command guidance, the LBE-1 could be flown by a pilot for training and evalulation.[1][3][4] Operational historyAlthough the initial contract called for the production of 100 examples of the LBE-1, continued trials of the Glomb showed that the combination of the glider's low performance and technical issues with the intended television guidance system made the concept operationally unworkable; accordingly, the contract was reduced to only 35 aircraft in early 1945.[1] In August 1945, with the end of World War II, the contract for production was cancelled entirely; only four LBE-1s would be completed,[5] being used only for evaluation purposes.[1] Specifications (LBE-1){{Aircraft specs|ref=[6] |prime units?=imp |genhide= |crew=One (optional) |capacity= |length m= |length ft=29 |length in=1.5 |length note= |span m= |span ft=32 |span in=6 |span note= |height m= |height ft= |height in= |height note= |wing area sqm= |wing area sqft=202 |wing area note= |airfoil= |empty weight kg= |empty weight lb= |empty weight note= |gross weight kg= |gross weight lb=7138 |gross weight note= |max takeoff weight kg= |max takeoff weight lb= |max takeoff weight note= |more general= |perfhide= |max speed kmh= |max speed mph=300 |max speed kts= |max speed note=in dive |max speed mach= |cruise speed kmh= |cruise speed mph= |cruise speed kts= |cruise speed note= |stall speed kmh= |stall speed mph= |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |minimum control speed kmh= |minimum control speed mph= |minimum control speed kts= |minimum control speed note= |range km= |range miles= |range nmi= |range note= |combat range km= |combat range miles= |combat range nmi= |combat range note= |ferry range km= |ferry range miles= |ferry range nmi= |ferry range note= |endurance= |ceiling m= |ceiling ft= |ceiling note= |g limits= |roll rate= |glide ratio= |climb rate ms= |climb rate ftmin= |climb rate note= |time to altitude= |sink rate ms= |sink rate ftmin= |sink rate note= |lift to drag= |wing loading kg/m2= |wing loading lb/sqft= |wing loading note= |more performance=
See also{{Portal|Aviation|United States Navy|World War II}}{{aircontent||related=
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}} ReferencesCitations1. ^1 2 3 4 5 Parsch 2005 2. ^Ordway and Wakeford 1960, p.180. 3. ^1 Naval Aviation News January 1946, p.19. 4. ^Kroger 1945, p.7. 5. ^Friedman 1982, p.201. 6. ^Dryden, Morten and Getting 1946, p.12 Bibliography{{refbegin}}
9 : Pratt-Read aircraft|United States military gliders 1940–1949|United States bomber aircraft 1940–1949|Glider aircraft|Low-wing aircraft|Unmanned aerial vehicles of the United States|World War II guided missiles of the United States|Cancelled military aircraft projects of the United States|Television guided weapons |
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