Handley Page Dart Herald

{{Short description|1950s British turboprop passenger aircraft}} {{More citations needed|article|date=January 2009}}{{tooshort|date=June 2023}} {{Use dmy dates|date=March 2020}} {{Infobox aircraft |name = HPR.7 Dart Herald |image = File:Handley Page HPR-7 Herald 401, Air UK AN1104923.jpg |caption = Handley Page Herald of [[Air UK]] |type = [[Turboprop]] [[airliner]] |national_origin= United Kingdom |manufacturer = [[Handley Page]] (Reading) |designer = |first_flight = 25 August 1955 |introduction = |retired = 1987 (passenger) <br /> 1999 (commercial) |status = Retired |primary_user =  |more_users =  |produced = 1959–1968 |number_built = 50 |variants = }}

The '''Handley Page HPR.7 Dart Herald''' is a British [[turboprop]] passenger [[aircraft]], designed in the 1950s as a [[Douglas DC-3|DC-3]] replacement, but only entering service in the 1960s by which time it faced stiff competition from Fokker ([[Fokker F27 Friendship|F27 Friendship]]) and Avro ([[Hawker Siddeley HS 748|Avro/Hawker Siddeley HS748]]). Sales were disappointing, contributing in part to the demise of Handley Page in 1970.

==Design and development== In the mid-1950s [[Handley Page]] developed a new fast short-range [[regional airliner]], intended to replace the older [[Douglas DC-3]], particularly in third-world countries.<ref name="Flight Herald p260">''Flight '' 19 August 1955, p. 260.</ref> The design, originally known as the HPR.3 Herald, emanated from the drawing office at Handley Page (Reading) Limited—the former [[Miles Aircraft]] factory site, which had developed an earlier airliner design, the [[Miles Marathon]]. The Herald was an extensive re-development of the original concept of the Marathon, notable for its high mounted wing.<ref name="hark p336-7">Payne 1997, pp. 336–337.</ref> Handley Page Reading succeeded in producing a modern design with excellent flight and performance characteristics. However, the company made a serious misjudgement which was, in the end, to cost the company dearly, and like some other classic British aircraft of the time, the Herald missed its chance. [[File:HPR.3 Herald Farnborough 1955.jpg|thumb|right|The HPR.3 Herald prototype with four [[Alvis Leonides Major]] engines, demonstrating at the [[Farnborough Airshow]] in September 1955]] [[File:Handley Page Herald (43008138552).jpg|thumb|Cockpit]]

After extensive consultation with DC-3 operators, it was decided to power the new airliner with [[piston engine]]s, rather than [[turboprop]]s, which were considered risky by the small airlines at which the HPR.3 was aimed. Handley Page preferred a four-engined design, which led to the new {{convert|870|hp|abbr=on}} [[Alvis Leonides Major]] 14-cylinder [[radial engine]], driving three-bladed propellers being chosen for the HPR.3.<ref name="hark p336">Payne 1997, p. 336.</ref><ref name="Barnes 76 p531">Barnes 1976, p. 531.</ref> At almost the same time, the Dutch company [[Fokker]] made the opposite choice for its competitor for the same market, choosing to power the [[Fokker F27 Friendship|F27 Friendship]] with two [[Rolls-Royce Dart]]s.<ref name="Barnes 76 p531" />

The HPR.3 could carry up to 44 passengers in its [[Cabin pressurization|pressurised cabin]], which could be quickly converted to allow the carrying of freight, with the aircraft's high wing, [[tricycle landing gear|nosewheel undercarriage]] and large doors at the front and rear of the cabin making the loading of cargo relatively simple. Large flaps were fitted to give good short takeoff and landing characteristics.<ref name="Barnes 76 p534">Barnes 1976, p. 534.</ref><ref name="Flight Herald p260-265">''Flight'' 19 August 1955, pp. 260–265.</ref> It was designed to cruise at a speed of 224 mph (360 km/h), had a range of 1,640 mi (2,640 km),<ref name="Barnes 76 p535">Barnes 1976, p. 535.</ref> could land and take off in a distance of less than 500 [[yard]]s (460 m) and had an initial rate of climb of over 1,800 ft/min.<ref name="Flight Herald p263">''Flight'' 19 August 1955, p. 263.</ref>

At first, it seemed that Handley Page had made the right choices with the HPR.3, which was named "Herald" in August 1954, this being a name easily translatable into French and Spanish.<ref name="Barnes 76 p532">Barnes 1976, p. 532.</ref> Extensive work by the sales team had produced considerable interest from potential customers, and Handley Page had 29 orders for the Herald (from [[Queensland Airlines]], [[Australian National Airways]], and [[Lloyd Aéreo Colombiano]]) by the time the first prototype made its maiden flight from [[Radlett]] on 25 August 1955, three months ahead of the first flight of the Friendship. [[Break-even (economics)|Break-even]] was expected after the sale of 75 aircraft and Handley Page expected total sales of up to 300 Heralds,<ref name="Barnes p532-3">Barnes 1976, pp. 532–533.</ref><ref name="Mellberg p64">Mellberg 2007, p. 64.</ref><ref name="hark p337">Payne 1997, p. 337.</ref> with first deliveries expected to British independent airline [[Air Kruise]] in 1958.<ref name="flight advance p149">''Flight'' 27 July 1956, p. 149.</ref>

By now, however, the Rolls-Royce Dart turboprop engine had shown proven success in the [[Vickers Viscount]]. Queensland Airlines and Australian National Airways cancelled their orders for Heralds in favour of turboprop-powered Friendships, while the Lloyd Aéreo Colombiano contract was stopped due to currency problems and Air Kruise's interest was ended when it was taken over by [[British Aviation Services]].<ref name="Barnes 76 p534" /><ref name="Mellberg p64" /> Before the second prototype had been completed, Handley Page was faced with the fact that it had no orders for the Herald, and that the market had changed and wanted turboprops.<ref name="Barnes 76 p534" /><ref name="hark p337" />

There had already been a very substantial investment in the Herald project, such that the management held a meeting to discuss continuation. Handley Page decided to press ahead with the Herald project, in an effort to recover the investment; announcing a new uprated version powered by the Rolls-Royce Dart.<ref>''Flight'', 10 May 1957, p. 644.</ref><ref>''Flight'' 17 May 1957, p. 652.</ref> The revised aircraft, now designated the HPR.7 Dart Herald, was powered by 1,910 shp Dart 527 engines driving 12 ft 6 in (3.81 m) variable pitch four-blade [[Dowty Rotol]] propellers,<ref name="flight 58 p134">''Flight'' 25 July 1958, p. 134.</ref> and the fuselage was lengthened by 20 in (51 cm), while other improvements included increased fuel capacity.<ref name="hark p337" /> The first prototype was converted to Dart Herald standard, making its maiden flight on 11 March 1958,<ref name="Barnes 76 p537">Barnes 1976, p. 537.</ref> with the first production aircraft flying on 30 October 1959. The initial Series 100 version of the Dart Herald was [[Type certificate|certified]] in April 1958.<ref name="Janes 65 p145" /> The basic price in 1960 was around £185,000.<ref>{{cite magazine |url=http://www.flightglobal.com/pdfarchive/view/1960/1960%20-%202695.html |title=Commercial Aircraft of the World: H.P.R. Herald Series 100 and 200 |magazine=Flight International |date=18 November 1960 |pages=805–806 |url-status=dead |archive-url=https://web.archive.org/web/20160306094314/https://www.flightglobal.com/pdfarchive/view/1960/1960%20-%202695.html |archive-date=2016-03-06}}</ref>

==Operational history== [[File:HPR.7 Herald G-APWG Jersey Als RWY 18.08.62 edited-2.jpg|thumb|right|HPR.7 Herald 201 of Jersey Airlines on final approach to Manchester Airport in August 1962]]

The first order for the Dart Herald was in June 1959 from [[British European Airways]] for a lease of three aircraft for use on its Scottish Highlands and Islands routes. The Herald, had by this time, lost its initial lead over the Friendship, which had entered service over six months previously, and to stimulate demand, Handley Page launched in 1960 a further improved version, the Series 200, which was lengthened by 42 in (107 cm), with corresponding increased weights, allowing up to 56 passengers to be carried, and attracted an order for six aircraft from [[Jersey Airlines]].<ref name="Mellberg p64" /><ref name="hark p338">Payne 1997, p. 338.</ref><ref name="flight 61 p662">''Flight'' 18 May 1961, p. 662.</ref>

The second prototype was converted to Series 200 standard and first flew in that form on 8 April 1961. Jersey Airlines began operations with a leased Series 100 on 16 May 1961, receiving the first of its own Series 200s in January 1962, while BEA began Herald operations in March 1962.<ref name="hark p338" />

The Herald attracted much early interest around the world because of its astonishing short field performance and excellent flight characteristics, but Handley Page failed to close many of the deals, as the F-27 and the [[Avro 748]]/HS.748 had become rival offerings, both of which proved significantly more popular. A key design feature of the Herald was the high-mounted wing, but with a noticeable dihedral. In addition, the Herald's vertical fin was covered with miniature airfoils, adding further to the Herald's excellent stability.{{Citation needed|date=July 2011}} Pilots reported that the Herald flew like a dream; very stable in the air, yet highly manoeuvrable even at slow speed.{{Citation needed|date=January 2009}} Ground handling was said to be the Herald's only vice due to an overlarge tailfin.{{Citation needed|date=July 2011}}

[[File:HP Herald 211 G-ASKK BUA Ringway 11.08.67 edited-2.jpg|thumb|left|Herald 211 of [[British United Airways]] operating a scheduled service at [[Manchester Airport]] in August 1967]] While the Series 200 was more commercially attractive, with no more Series 100 being ordered, sales were still slow. While the Herald was cheap compared to its major competitors, and in the 200 series had a roomy cabin, the Friendship could carry a larger payload and both the Friendship and the [[Avro 748]]/HS.748 had better performance, resulting in superior long-term economics.<ref name="Mellberg p66">Mellberg 2007, p. 66.</ref> By 1963, only 35 Heralds had been sold compared with over 240 Friendships.<ref name="hark p339">Payne 1997, p. 339.</ref>

One hope of improving sales was to develop the Herald as a military transport. The [[Royal Air Force]] had a requirement for 45 tactical transports to replace piston-engined [[Vickers Valetta]]s, and Handley Page began work in 1960 on the HP.124 to meet this need. This would have a new rear fuselage with a rear loading ramp under the raised tail. The HP.124 was considered favourite to beat Avro's 748 derivative, the Avro 780, with the high wing of the Handley Page expected to give easier loading than the more expensive Avro. While short-field testing of the prototype Herald 200 at [[RAF Martlesham Heath]] in 1961 showed off the Herald's good handling and ability to operate from unprepared airstrips, other obstacles were more taxing. The [[Minister of Aviation]], [[Peter Thorneycroft]], refused to sign a contract for the HP.124 unless Handley Page would agree to a merger with [[British Aircraft Corporation]] or [[Hawker Siddeley]] as part of the government's policy of consolidation of the British aircraft industry. As Hawker Siddeley offered less than half the valuation that [[Frederick Handley Page]] placed on the company, the merger did not occur, and the RAF's order went to the Avro 780, which became the [[Hawker Siddeley Andover|Andover]].<ref name="Barnes 76 p543">Barnes 1976, p. 543.</ref><ref name="hark p341">Payne 1994, p. 341.</ref> The Herald Series 400 was a simpler tactical transport with a strengthened cabin floor and side loading doors that could be opened in flight for dropping of supplies or paratroops. Eight were built for the [[Royal Malaysian Air Force]].<ref name="hark p338-9">Payne 1997, pp. 338–339.</ref>

[[File:Dart Herald 62.jpg|thumb|Dart Herald Srs 202]] By 1965, almost all sales momentum had been lost, and Handley Page proposed the Series 700, powered by 2,320 ehp (1,730 kW) Dart 532s, with increased fuel and weights and was capable of seating up to 60 passengers. The Brazilian airline [[VASP]] placed an order for ten Series 700s, with plans made for production in Brazil, while further orders for the 700 were placed by Swiss airline [[Globe Air]] and Taiwanese [[Far Eastern Air Transport]], and production started on the new model. VASP cancelled its order, however, when it could not obtain financing from the Brazilian government, and Handley Page stopped work on the 700, scrapping six airframes on the production line.<ref name="hark p339" /><ref name="Barnes 76 p550-1">Barnes 1976, pp. 550–551.</ref>

Production ended in 1968. Only 36 examples of the Series 200 production model were eventually built during the six years of production, together with four Series 100s and eight Series 400s.<ref name="Mellberg p66" /> The 50th, and last, Herald (a series 200 for Israel's [[Arkia]]) was flown and delivered in August 1968,<ref name="Barnes 76 p552">Barnes 1976, p. 552.</ref> after which Herald production ceased, allowing Handley Page's attention to be fully focused on the [[Handley Page Jetstream|HP.137 Jetstream]].<ref name="hark p342">Payne 1997, p. 342.</ref>

Handley Page went into voluntary liquidation in August 1969, the spiralling cost of developing the Jetstream forcing its closure. Continuing support for the remaining Heralds in service was maintained by the setting up of a new company, Dart Herald (Support) Ltd, partly owned by [[Scottish Aviation]].<ref name="hark p342-3">Payne 1997, pp. 342–343.</ref>

The Herald's last ever passenger flight was operated by [[British Air Ferries]] in 1987 doing subcharters for Ryanair.<ref name="Aero13 p93">Chorlton ''Aeroplane'' Summer 2013, p. 93.</ref> The type remained in use as a freighter, but by 1999 the only one remaining in service was a series 401 ''G-BEYF'' with [[Channel Express]]; it was retired at Bournemouth after its last flight on 9 April 1999.<ref>Air-Britain Aviation World, June 2017, p. 63.</ref>

==Variants== [[File:Janus Airways Handley Page Herald at Basle Airport - April 1984.jpg|thumb|Handley Page HPR-7 Herald 214 of [[Janus Airways]] at Basle Airport, 15 April 1984]] ;HPR-3 Herald :Prototype powered by four [[Alvis Leonides Major 702/1]] 14-cyl. radial engines – [[seating capacity]] 44 ;HPR-7 Dart Herald ;Series 100 :Initial Dart turboprop production version. Four built. ;Series 200 :Fuselage length increased from 71 ft 11 in to 75 ft 6 in and maximum accommodation rose from 47 to 56 seats. 36 built. ;Series 300 :Proposed version with modifications to meet United States Airworthiness requirements. ;Series 400 :Side-loading military transport derivative of the Series 200 incorporating a strengthened floor for carrying freight, 50 troops or 24 casualty stretchers and medical attendants. Eight built for the Royal Malaysian Air Force. ;Series 500 :Proposed more powerful version of the 400.<ref name="Janes 65 p145" /> ;Series 600 :Proposed version with 5 ft (1.5 m) increase in fuselage length and more powerful Dart turboprops. High-density accommodation for 64–68 passengers.<ref name="Janes 65 p145">Taylor 1965, p. 145.</ref> ;Series 700 :Longer-range version similar to the Series 600 but without fuselage lengthening.<ref name="Janes 65 p145" /> Ten ordered by [[VASP]] but production not initiated. ;HPR-8 :Planned car-ferry derivative of Herald to meet 1959 [[Silver City Airways]] requirement. It had a new, unpressurised fuselage with clamshell doors in the nose, capable of carrying six cars or 100 passengers. It was rejected in favour of the [[Aviation Traders Carvair]] and went unbuilt.<ref name="Barnes 76 p540-3">Barnes 1976, pp. 540–543.</ref><ref name="hark p339,1">Payne 1997, pp. 339, 341.</ref> ;HP.124 :Proposed tactical transport with rear loading ramp for RAF. Unbuilt.<ref name="Barnes 76 p543" /> ;HP.125 :Proposed [[V/STOL]] transport based on HP.124, with 18 [[Rolls-Royce RB162]] lift-jets in underwing pods. Unbuilt.<ref name="Barnes 76 p543-4">Barnes 1976, pp. 543–544.</ref> ;HP.127 "Jet Herald" :1962 study for pure jet-powered development of Herald. Based on basic Herald design but with a stretched fuselage, accommodating up to 70 passengers, and powered by two [[Rolls-Royce Spey]] [[turbofan]] engines slung in pods under the shortened but still straight wings. Project unbuilt.<ref name="Barnes 76 p544">Barnes 1976, p. 544.</ref><ref>"World News." ''Air Pictorial'', Vol. 24, No. 10, October 1962, p. 313.</ref> ;HP.129 "Mini Herald" :Design for smaller, jet-powered derivative of Herald, powered by two Speys and seating 30 passengers. Unbuilt.<ref name="Barnes 76 p544" /> ;HP.131 :Improved HP.124 offered to Belgium in 1965 along with HP.132 and HP.133. Unbuilt.<ref name="hark p342" /> ;HP.132 :Variant of HP.133 with additional [[General Electric CF700]] boost engines in wingtips. Unbuilt.<ref name="hark p342" /> ;HP.133 :As HP.132 but with CF700s in retractable nacelles. Unbuilt.<ref name="hark p342" />

==Operators==

===Civil operators=== [[File:G-APWF HPR.7 Dart Herald 201 British Island Aws MAN 30JUL72 (6890684559).jpg|thumb|[[British Island Airways]] Dart Herald; BIA operated up to 20 examples of this type]]

{{Columns-list|colwidth=15em| ;{{BRA}} * SADIA SA ''Transportes Aéreos'' (Later renamed [[Transbrasil]]) – 8 as first operator * [[TABA – Transportes Aéreos da Bacia Amazônica]]

; {{CAN}} * [[Eastern Provincial Airways]] – 4 as first operator * [[Maritime Central Airways]] – 1 as first operator * [[Nordair]] – 1 as first operator ; {{COL}} * [[Líneas Aéreas La Urraca]] ; {{FRA}} * [[Europe Aero Service]] ; {{GER}} * [[Bavaria Fluggesellschaft]] – 2 as first operator ; {{GUA}} * Aerovías ; {{ISR}} * [[Arkia Israel Airlines|Arkia]] – 5 as first operator ; {{ITA}} * [[Aerolinee Itavia]] – 4 as first operator ; {{JOR}} * [[Royal Jordanian|Alia Jordanian Airlines]] – 1 as first (civil) operator ; {{PHI}} * [[Air Manila|Air Manila International]] – 1 as first operator ; {{SUI}} * Globe Air – 3 as first operator ; {{TWN}} * [[Far Eastern Air Transport]] ; {{UK}} * [[Air UK]] * [[Court Line|Autair International Airlines]] * BAC Charter * [[HD Air Ltd|BAC Express]] * [[British Air Ferries]] – 7 as first (civil) operator * [[British European Airways]] – 3 as first operator * [[British Island Airways]] - at one point (1979) operated 20 Heralds * [[British Midland Airways Ltd.|British Midland Airways]] * [[British United Airways]] – 6 as first operator * [[British United Island Airways]] * [[Brymon Airways]]<ref>Bullen 1982, p. 30.</ref> * [[Channel Express]] * [[Court Line]] * [[Janes Aviation]] * [[Jersey Airlines]] – 3 as first operator * Securicor (operated by Skyguard){{citation needed|date=March 2016}} * South East Air ; {{ZAI}} * MMM Aero Service ;{{OMA}} *[[Oman aviation services]] }}

===Military operators=== ; {{JOR}} * [[Royal Jordanian Air Force]] ; {{MYS}} * [[Royal Malaysian Air Force]]

==Accidents and incidents== * On 10 August 1958, the prototype Dart Herald was due to appear at [[Farnborough Airfield|Farnborough]] air show but suffered an engine failure en route from Woodley. The fuel lines ruptured and a serious fire ensued. The engine bearers burned through and the aircraft was finally [[crash landing|crash landed]] by the pilot, [[Hedley Hazelden|Squadron Leader Hedley Hazelden]] in a field. The landing was acknowledged as an astonishing feat of airmanship.<ref>[https://www.telegraph.co.uk/news/main.jhtml?xml=/news/2001/08/27/db02.xml "Obituary: Squadron Leader Hedley Hazelden."]{{dead link|date=July 2021|bot=medic}}{{cbignore|bot=medic}} ''Daily Telegraph'', 27 August 2001. Retrieved: 26 March 2010.</ref> * On 17 March 1965, after a structural failure of the fuselage, [[Eastern Provincial Airways Flight 102]] en route from [[Halifax Stanfield International Airport|Halifax]] to [[Sydney/J.A. Douglas McCurdy Airport|Sydney]] crashed near [[Upper Musquodoboit, Nova Scotia|Upper Musquodoboit]], [[Nova Scotia]], killing all eight people on board.<ref>[http://aviation-safety.net/database/record.php?id=19650317-2 "Accident description: Eastern Provincial Airways Flight 102."] ''aviation-safety.net''. Retrieved: 26 March 2010.</ref> The fuselage had split lengthwise in midair along its belly owing to corrosion. After signs of corrosion were found both in a [[British European Airways]]' Herald and the Heralds operated by [[Royal Jordanian|Alia]], all Heralds in service were recalled by Handley Page for repair and corrosion-proofing.<ref name="Barnes 76 p550">Barnes 1976, p. 550.</ref> * On 10 April 1965, ''JY-ACQ'' a [[Royal Jordanian|Royal Jordanian Airlines]] Herald [[1965 Damascus Alia Handley Page Herald crash|crashed]] into a hill near [[Damascus]], [[Syria]] killing all 54 passengers and crew on board.<ref>[http://aviation-safety.net/database/record.php?id=19650410-0 "Accident description: Handley Page HPR-7 Herald 207."] ''Aviation Safety Network.'' Retrieved: 21 July 2011.</ref> * On 3 November 1967, a [[Sadia Transportes Aéreos|Sadia]] Handley Page Dart Herald 214 registration PP-SDJ flying from [[Congonhas-São Paulo Airport|São Paulo-Congonhas]] to [[Afonso Pena International Airport|Curitiba-Afonso Pena]] collided with a hill during the approach to Curitiba. All crew and 21 passengers died; four passengers survived.<ref>[http://aviation-safety.net/database/record.php?id=19671103-0 "Accident description: Sadia Handley Page Dart Herald 214."] ''Aviation Safety Network.'' Retrieved: 6 May 2011.</ref><ref>{{Cite book |last=Germano da Silva |first=Carlos Ari César |title=O rastro da bruxa: história da aviação comercial brasileira no século XX através dos seus acidentes 1928–1996 |publisher=EDIPUCRS |year=2008 |isbn=978-85-7430-760-2 |edition=2 |location=Porto Alegre |pages=256–261 |language=pt |chapter=Serra da Graciosa}}</ref> * On 24 February 1969, [[Far Eastern Air Transport Flight 104]] crashed on approach after engine two failed near [[Tainan]], [[Taiwan]] killing all 36 on board.

==Aircraft on display== [[File:CNAM Herald.jpg|thumb|right|HPR.7 Herald 211 ''G-ASKK'' preserved at the [[City of Norwich Aviation Museum]]]]

===United Kingdom=== ;On Display * Herald 100 ''G-APWA'' at the [[Museum of Berkshire Aviation]], [[Woodley, Berkshire|Woodley]].<ref name="war16">Ellis 2016, p. 16</ref> * Herald 201 ''G-APWJ'' at [[Morayvia]], [[Kinloss, Scotland|Kinloss]], Scotland, in [[Air UK]] markings. It was formerly on display at [[Imperial War Museum Duxford]]<ref name="war26">Ellis 2016, p. 26</ref> from 1985 to 2021.<ref>{{Cite web |title=Hasta la vista Herald |url=https://www.duxfordaviationsociety.org/das-article?title=hasta-la-vista-herald&id=107 |access-date=2024-08-08 |website=www.duxfordaviationsociety.org |language=en}}</ref> * Herald 211 ''G-ASKK'' at the [[City of Norwich Aviation Museum]], [[Norwich Airport]], Norfolk.<ref name="war174">Ellis 2015, p. 174</ref>

==Specifications (Dart Herald 200)== {{Aircraft specs |ref=Jane's All the World's Aircraft 1969-70<ref name="JAWA1969-70">{{Cite book |title=Jane's All the World's Aircraft 1969-70 |publisher=Sampson Low, Marston & Company |year=1969 |editor-last=Taylor |editor-first=John W.R. |edition=60th |location=London |pages=201–202}}</ref> |prime units?=kts |crew=2 |capacity=50-56 passengers, {{cvt|11700|lb}} maximum payload |length ft=75 |length in=6 |length note= |span ft=94 |span in=9.5 |span note= |height ft=24 |height in=1 |height note= |wing area sqft=886 |aspect ratio= |airfoil='''root:''' [[NACA airfoil|NACA]] 23016.5; '''tip:''' NACA 4412<ref name="Selig">{{Cite web |last=Lednicer |first=David |title=The Incomplete Guide to Airfoil Usage |url=https://m-selig.ae.illinois.edu/ads/aircraft.html |access-date=16 April 2019 |website=m-selig.ae.illinois.edu}}</ref> |empty weight lb=25800 |empty weight note=equipped |max takeoff weight lb=43700 |max takeoff weight kg=19818 |max takeoff weight note=<br /> *'''Maximum zero-fuel weight:''' {{cvt|37500|lb}} *'''Maximum landing weight:''' {{cvt|39500|lb}} |gross weight lb= |gross weight note= |fuel capacity={{cvt|1080|impgal|USgal l|0}}{{efn|Two optional {{cvt|600|impgal|USgal l|0}} under-wing tanks could be fitted}} |more general=  |eng1 number=2 |eng1 name=[[Rolls-Royce RDa.7 Dart Mk.527]] |eng1 type=[[turboprop]] engines |eng1 shp=2105 |eng1 note=equivalent{{efn|({{cvt|1910|shp}} + {{cvt|505|lbf}} residual thrust}}

|max speed kts= |max speed note= |cruise speed kts=239 |cruise speed note=at {{cvt|15000|ft}} and {{cvt|39500|lb}} AUW |stall speed kts=65 |stall speed note=at {{cvt|30000|lb}} AUW |never exceed speed kts=304 |range nmi=608 |range note=with max. payload, {{cvt|87|nmi|mi km|0}} diversion, 45 minutes holding{{efn|{{cvt|1529|nmi|mi km|0}} with max. standard fuel, no allowances}} |ferry range nmi= |ferry range note= |endurance= |ceiling ft=27900 |ceiling note=at {{cvt|35000|lb}} AUW{{efn|Service ceiling on one engine: {{cvt|13000|ft}} at {{cvt|35000|lb}} AUW}} |climb rate ftmin=1805 |climb rate note=at {{cvt|41000|lb}} AUW |time to altitude= |lift to drag= |wing loading lb/sqft=48.5 |wing loading note= |fuel consumption lb/mi= |power/mass={{cvt|0.098|shp/lb}} (equivalent hp) |more performance=<br /> *'''Take-off distance to {{cvt|35|ft|0}}:''' {{cvt|2700|ft}} at {{cvt|39500|lb}} AUW *'''Landing distance from {{cvt|50|ft|0}}:''' {{cvt|1900|ft}} at {{cvt|39500|lb}} AUW |avionics= }}

==See also== {{aircontent |related= |similar aircraft= * [[Antonov An-24]] * [[Fairchild Hiller FH-227]] * [[Fokker F27 Friendship]] * [[Hawker Siddeley HS 748]] |lists= |see also= }}

==Notes== {{notelist}} ==References== ;Notes {{Reflist}}

;Bibliography {{Refbegin}} * Barnes, C.H. ''Handley Page Aircraft Since 1907''. London: Putnam, 1976. {{ISBN|0-370-00030-7}}. * Barnes, C. H. ''Handley Page Aircraft Since 1907''. London: Putnam & Company, Ltd., 1987. {{ISBN|0-85177-803-8}}. * Bullen, Kim. "Brymon Airways — first decade". ''Aircraft Illustrated'', Vol. 15, No. 1, January 1982. pp. 28–32. * Chorlton, Martyn. "Database: Handley Page H.P.R.3 Herald & H.P.R.7 Dart Herald". ''[[Aeroplane Monthly|Aeroplane]]'', Vol. 41, No. 7, Summer 2013. pp. 79–93. * {{cite magazine |url=http://www.flightglobal.com/pdfarchive/view/1960/1960%20-%202695.html |title=Commercial Aircraft of the World: H.P.R. Herald Series 100 and 200 |magazine=Flight International |date=18 November 1960 |pages=805–806 |url-status=dead |archive-url=https://web.archive.org/web/20160306094314/https://www.flightglobal.com/pdfarchive/view/1960/1960%20-%202695.html |archive-date=2016-03-06}} * Cowell, G. ''Handley Page Herald''. Jane’s Publishing Co. Ltd./Airline Publications & Sales Ltd. 1980.

* {{Cite book |last=Ellis |first=Ken |title=Wrecks and Relics 25th Edition |publisher=Crecy Publishing |year=2016 |isbn=978-191080-9037 |location=Manchester, England}} * Jackson, A.J. ''British Civil Aircraft since 1919: Volume 2''. London: Putnam, 1973. {{ISBN|0-370-10010-7}}. * Mellberg, William F. "Aircraft Profile: Handley Page Herald". ''Air International'', Vol. 72, No. 5, May 2007, pp. 64–66. * Payne, Richard. "Hark a DC-3 Replacement". ''[[Air International]]'', Vol. 53, No. 6, December 1997, pp. 336–343. * [[John W. R. Taylor|Taylor, John W. R.]], editor. ''Jane's All The World's Aircraft 1965–66''. London: Sampson Low, Marston, 1965. * [[John W. R. Taylor|Taylor, John W. R.]] (ed.). ''Jane's All the World's Aircraft 1969-70''. London: Sampson Low, Marston & Co, Ltd., 1969. {{ISBN|0-354-000-519}} {{Refend}}

==Further reading== * Clayton, Donald C. ''Handley Page, an Aircraft Album''. Shepperton, Surrey, UK: Ian Allan Ltd., 1969. {{ISBN|0-7110-0094-8}}. * Falcus, M., ''Handley Page Herald'', DestinWorld Publ., Darlington, Durham, 2015

==External links== {{Commons category|Handley Page Herald}} * [http://www.airliners.net/info/stats.main?id=240 Airliners.net] * [http://www.flightglobal.com/pdfarchive/view/1959/1959%20-%200869.html "Handling the Herald"] a 1959 ''Flight'' article on the Herald

[[Category:1950s British airliners]] [[Category:Handley Page aircraft|Dart Herald]] [[Category:Twin-turboprop tractor aircraft]] [[Category:Aircraft first flown in 1955]] [[Category:High-wing aircraft]] [[Category:Aircraft first flown in 1958]] [[Category:Aircraft with retractable tricycle landing gear]]