LTV L450F: Difference between revisions
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{|{{Infobox |
{|{{Infobox aircraft begin |
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|name=L450F |
|name=L450F |
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|image= |
|image=LTV L45ØF.jpg |
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|caption= |
|caption= |
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}}{{Infobox |
}}{{Infobox aircraft type |
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|type=Reconnaissance aircraft |
|type=Reconnaissance aircraft |
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|manufacturer=[[Ling-Temco-Vought]] |
|manufacturer=[[Ling-Temco-Vought]] |
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|number built= |
|number built= |
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|status= |
|status= |
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|primary user= [[ |
|primary user= [[United States Air Force]] |
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|more users= |
|more users= |
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|unit cost= |
|unit cost= |
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|developed from= [[Schweizer SGS 2-32]] |
|developed from= [[Schweizer SGS 2-32]] |
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|variants with their own articles = |
|variants with their own articles = |
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|developed into= [[LTV XQM-93]] |
|developed into= [[LTV XQM-93]] |
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}} |
}} |
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The '''LTV L450F''', also known as the '''L45ØF''',<ref name="Janes"/> was a prototype quiet [[reconnaissance aircraft]], developed by [[Ling-Temco-Vought]] in the late 1960s for use in the [[Vietnam War]] by the [[United States]]. Based on the airframe of a [[Schweizer 2-32]] sailplane, the aircraft flew in 1970, and was developed into the [[LTV XQM-93|XQM-93]] reconnaissance [[drone (aircraft)|drone]] before the project was cancelled. |
The '''LTV L450F''', also known as the '''L45ØF''',<ref name="Janes"/> was a prototype quiet [[reconnaissance aircraft]], developed by [[Ling-Temco-Vought]] in the late 1960s for use in the [[Vietnam War]] by the [[United States]]. Based on the airframe of a [[Schweizer 2-32]] sailplane, the aircraft flew in 1970, and was developed into the [[LTV XQM-93|XQM-93]] reconnaissance [[drone (aircraft)|drone]] before the project was cancelled. |
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==Design and development== |
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==Development== |
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Developed as a follow on to the [[Igloo White]] program, the L450F was intended to provide a quiet reconnaissance and communications relay aircraft.<ref name="Janes">Jane's |
Developed as a follow on to the [[Igloo White]] program, the L450F was intended to provide a quiet reconnaissance and communications relay aircraft.<ref name="Janes">Jane's 1971, p. 344-345</ref> Under a $1 million [[USD]] contract by LTV Electrosystems, the L450F was developed from a [[Schweizer SGS 2-32]] [[sailplane]], modified by Schweizer to LTV's specifications.<ref name="Janes"/> |
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These modifications included stronger wing [[spar]]s, thicker wing skin, installation of a [[Pratt & Whitney PT6A]] turboprop engine driving a three-bladed propeller, and main landing gear based on that of the [[Grumman Ag-Cat]] agricultural aircraft.<ref name="Janes"/> An alternative configuration, using a [[piston engine]], was also proposed.<ref name="Janes"/> |
These modifications included stronger wing [[spar (aviation)|spar]]s, thicker wing skin, installation of a [[Pratt & Whitney PT6A]] turboprop engine driving a three-bladed propeller, and main landing gear based on that of the [[Grumman Ag-Cat]] agricultural aircraft.<ref name="Janes"/> An alternative configuration, using a [[piston engine]], was also proposed.<ref name="Janes"/> |
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| ⚫ | The prototype L450F first flew in February 1970, but was destroyed during its third flight, on 23 March that year, the pilot successfully bailing out. A second prototype was then completed and flown, successfully completing the testing program, and a third prototype was ordered as the unmanned [[XQM-93]] drone, under the [[Compass Dwell]] project. Four examples of the XQM-93 were contracted for by the [[United States Air Force]], however the Compass Dwell project was subsequently cancelled.<ref name="Janes"/><ref name="VS">Goebel, Greg. [http://www.vectorsite.net/twuav_12.html#m2 "The Prehistory of Endurance UAVs"] {{webarchive|url=https://web.archive.org/web/20130730032004/http://www.vectorsite.net/twuav_12.html |date=30 July 2013 }}. ''VectorSite''. Accessed 18 June 2010.</ref> |
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==Flight testing== |
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| ⚫ | The prototype L450F first flew in February 1970, but was destroyed during its third flight, on 23 March that year, the pilot successfully bailing out. A second prototype was then completed and flown, successfully completing the testing program, and a third prototype was ordered as the unmanned [[XQM-93]] drone, under the [[Compass Dwell]] project. Four examples of the XQM-93 were contracted for by the [[United States Air Force]], however the Compass Dwell project was subsequently cancelled.<ref name="Janes"/><ref name="VS">Goebel, Greg. [http://www.vectorsite.net/twuav_12.html#m2 "The Prehistory of Endurance UAVs"]. ''VectorSite''. Accessed |
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==Operational history== |
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| ⚫ | |||
[[File:LTV 450F out to pasture.jpg|thumb|right|The second L450F on display]] |
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27 March 1972 Donald R. Wilson reached the altitude of 15,456 m (50,708 ft) in horizontal flight flying the remaining L450F, [[Aircraft registration|registered]] N2450F, setting a new [[Fédération Aéronautique Internationale]] international record, Class C-1c, Group II<ref>{{cite web|url=http://www.fai.org/fai-record-file/?recordId=1385 |title=Fai Record File |publisher=Fai.org |date= |accessdate=2012-05-05}}</ref> (Powered aeroplanes, takeoff weight 1000 to 1750 kg, turboprop). This record still stood as of 27 March 2012. |
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| ⚫ | |||
{{Aircraft specs |
{{Aircraft specs |
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|ref=<ref name="Janes"/> |
|ref=Janes<ref name="Janes"/> |
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|prime units?=imp |
|prime units?=imp |
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|more power= |
|more power= |
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|prop blade number=3 |
|prop blade number=3 |
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|prop name=Hartzell |
|prop name=[[Hartzell Propeller|Hartzell]] |
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|prop dia m= |
|prop dia m= |
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|prop dia ft= |
|prop dia ft= |
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|ferry range nmi= |
|ferry range nmi= |
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|ferry range note= |
|ferry range note= |
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|endurance= |
|endurance=24–30 hours |
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|ceiling m= |
|ceiling m= |
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|ceiling ft=52000 |
|ceiling ft=52000 |
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==References== |
==References== |
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===Notes=== |
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{{ |
{{Reflist}} |
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===Bibliography=== |
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{{refbegin}} |
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{{Refbegin}} |
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* Taylor, John W.R. (ed.) ''Jane's All The World's Aircraft |
* Taylor, John W.R. (ed.) ''Jane's All The World's Aircraft 1971–1972''. London: Sampson Low Marston & Co, 1971. {{ISBN|0 354-000-942}}. |
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{{refend}} |
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{{Refend}} |
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==External links== |
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{{commons category-inline|LTV L450F}} |
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{{ |
{{Vought aircraft}} |
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{{Use dmy dates|date=August 2019}} |
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{{DEFAULTSORT:Ltv L450f}} |
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| ⚫ | |||
[[Category:Vought aircraft|L45OF]] |
[[Category:Vought aircraft|L45OF]] |
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[[Category:Single-engined tractor aircraft]] |
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[[Category:High-wing aircraft]] |
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[[Category:Single-engined turboprop aircraft]] |
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[[Category:Aircraft first flown in 1970]] |
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Latest revision as of 07:36, 12 February 2020
| L450F | |
|---|---|
| |
| Role | Reconnaissance aircraft |
| Manufacturer | Ling-Temco-Vought |
| First flight | February 1970 |
| Primary user | United States Air Force |
| Developed from | Schweizer SGS 2-32 |
| Developed into | LTV XQM-93 |
The LTV L450F, also known as the L45ØF,[1] was a prototype quiet reconnaissance aircraft, developed by Ling-Temco-Vought in the late 1960s for use in the Vietnam War by the United States. Based on the airframe of a Schweizer 2-32 sailplane, the aircraft flew in 1970, and was developed into the XQM-93 reconnaissance drone before the project was cancelled.
Design and development
[edit]Developed as a follow on to the Igloo White program, the L450F was intended to provide a quiet reconnaissance and communications relay aircraft.[1] Under a $1 million USD contract by LTV Electrosystems, the L450F was developed from a Schweizer SGS 2-32 sailplane, modified by Schweizer to LTV's specifications.[1]
These modifications included stronger wing spars, thicker wing skin, installation of a Pratt & Whitney PT6A turboprop engine driving a three-bladed propeller, and main landing gear based on that of the Grumman Ag-Cat agricultural aircraft.[1] An alternative configuration, using a piston engine, was also proposed.[1]
The prototype L450F first flew in February 1970, but was destroyed during its third flight, on 23 March that year, the pilot successfully bailing out. A second prototype was then completed and flown, successfully completing the testing program, and a third prototype was ordered as the unmanned XQM-93 drone, under the Compass Dwell project. Four examples of the XQM-93 were contracted for by the United States Air Force, however the Compass Dwell project was subsequently cancelled.[1][2]
Operational history
[edit]
27 March 1972 Donald R. Wilson reached the altitude of 15,456 m (50,708 ft) in horizontal flight flying the remaining L450F, registered N2450F, setting a new Fédération Aéronautique Internationale international record, Class C-1c, Group II[3] (Powered aeroplanes, takeoff weight 1000 to 1750 kg, turboprop). This record still stood as of 27 March 2012.
Specifications (prototype)
[edit]Data from Janes[1]
General characteristics
- Crew: 1 (pilot)
- Length: 29 ft (8.8 m)
- Wingspan: 57 ft (17 m)
- Empty weight: 2,400 lb (1,089 kg)
- Max takeoff weight: 4,600 lb (2,087 kg)
- Fuel capacity: 2,300 pounds (1,000 kg)
- Powerplant: 1 × Pratt & Whitney PT6A-29 , 778 shp (580 kW)
- Propellers: 3-bladed Hartzell
Performance
- Cruise speed: 105 mph (169 km/h, 91 kn)
- Range: 6,000 mi (9,650 km, 5,210 nmi)
- Endurance: 24–30 hours
- Service ceiling: 52,000 ft (16,000 m)
- Maximum glide ratio: 28:1
- Rate of climb: 2,600 ft/min (13 m/s)
See also
[edit]Related development
Aircraft of comparable role, configuration, and era
Related lists
References
[edit]Notes
[edit]- ^ a b c d e f g Jane's 1971, p. 344-345
- ^ Goebel, Greg. "The Prehistory of Endurance UAVs" Archived 30 July 2013 at the Wayback Machine. VectorSite. Accessed 18 June 2010.
- ^ "Fai Record File". Fai.org. Retrieved 5 May 2012.
Bibliography
[edit]- Taylor, John W.R. (ed.) Jane's All The World's Aircraft 1971–1972. London: Sampson Low Marston & Co, 1971. ISBN 0 354-000-942.
External links
[edit]
Media related to LTV L450F at Wikimedia Commons