Handley Page (Reading) HPR-3 Herald
Handley Page (Reading) HPR-7 Herald
A medium-sized transport designed to take the place of the DC-3, the Handley Page HPR-3 Herald design shows an essentially straight forward approach with four piston engines, a high-wing layout and a fuselage designed to carry 44 passengers, freight, or mixed loads. It is to be pressurized to a relatively low differential, and will carry a full payload of 10,705 lb. for a no reserve range of 350 st. miles, or 4,650 lb. for a full-tank range of 2,050 miles.
Two prototypes were being built in 1954.
The Herald first flew in 1955, powered by four Alvis Leonides piston engines.
The prototype Dart-engined Herald made its first flight on 11 March 1958 and the first production Herald Series 100 flew on 30 October 1959. The Series 100 accommodated between 38 and 47 passengers. The Series 200 was the main production version with a forward fuselage 1.07m longer than that of the Series 100. Accommodation was provided for 50-56 passengers. Powered by two Rolls-Royce Dart 527 turboprops of 2,150 shaft hp, its maximum cruise speed is 274 mph.
The Series 300 (a modified Series 200 developed to meet US airworthiness requirements) was followed by the Series 400 military transport with a side loading door and accommodation for 50 troops, paratroops, 24 stretchers or freight, eight of which went to the Royal Malaysian Air Force. The projected Series 500 was followed by the Dart 532/9 turboprop-engined Series 600.
The final two versions were the Series 700 long-range version of the Series 600, accommodating up to 60 passengers or 52 passengers and baggage over 1,980km stages, and the Series 800 military version of the 700.
By 1958, when they offered an alternative version powered by Rolls-Royce Dart turboprops, the Fokker F 27 had cornered the market. Only 48 aircraft were produced.
Engines: 4 x Alvis Leonides Major
Wingspan: 95 ft
Length: 70 ft 3 in
Mauw: 34,000 lb
Max speed: 263 mph
HP Herald Srs 200
Powerplant: two Rolls-Royce Dart RDa.7 M1k. 527 turboprops, 1570kW / 2105 ehp
Propellers: Rotol four-blade, fully feathering 12 ft 6 in diameter
Wingspan, 94 ft 9 in / 28.88 m
Length, 75 ft 6 in / 23.01 m
Height, 24 ft 1 in / 7.34 m
Gross wing area, 82.31 sq.m / 886 sq.ft
Max. usable floor area, 283 sq.ft
Max. usable volume, 1802 cu.ft
Max. cabin length, 54 ft 0 in
Max. width, 8 ft 8.25 in
Max. height, 6 ft 3.75 in
Accommodation: 50 passengers at 30.5 in pitch; 56 at 30 in pitch.
Basic operational 25,758 lb
Total fuel, 8640 1b
Max. take-off with 5 deg flap, 41000 lb
Max. landing, 39,500 lb
Max. payload, 11,242 lb
Max. zero fuel, 37,500 lb
Power loading (max. take-off weight), 10.2 lb/ehp
Wing loading (max. take-off weight), 48.5 lb/sq.ft
Wing loading (max. landing weight), 44.5 lb/sq.ft
Max level speed: 275 mph / 443 kph
High-speed cruise, 237 kt. at 15,000 ft
Long-range cruise, 230 kt. at 23,000 ft
Approach speed, 89 kt
Ceiling: 8500 m / 27900 ft
Take-off field length, ISA at sea level, 5000 ft
Landing field length, ISA at sea level, 3575 ft
Range, no reserves, ISA with max fuel, 8602 lb payload, 1 500 nm
Range w/max.payload: 1786 km / 1110 miles