Blackburn Iris

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Iris
The Blackburn Iris Mk III S1263
Type	Flying Boat
Manufacturer	Blackburn Aircraft
Maiden flight	1926
Introduced	1929
Retired	1933
Primary user	RAF
Number built	5
Variants	Blackburn Perth

The Blackburn Iris was a 1926 British biplane flying boat.

The Iris Mark V was developed into the aircraft that subsequently became the Blackburn Perth.

Contents 1 Variants 2 Operators 3 Specifications (Iris) 4 References 5 See also

[edit] Variants

• R.B.1 Iris I : Prototype. One built.
• R.B.1A Iris II : The Iris I was fitted with three 675-hp (503-kW) Rolls-Royce Condor IIIA inline piston engines.
• R.B.1B Iris III : Five-seat long-range maritime reconnaissance flying boat for the RAF. Powered by three 675-hp (503-kW) Rolls-Royce Condor IIIB inline piston engines. Four built.
• R.B.1C Iris IV : The Iris II was fitted with three 800-hp (597-kW) Armstrong Siddeley Leopard III radial piston engines.
• R.B.1D Iris V : This was the final variant. Three Iris Mk IIIs were fitted with 825-hp (615-kW) Rolls-Royce Buzzard IIMS piston engines.

[edit] Operators

 United Kingdom

• Royal Air Force
  • No. 209 Squadron RAF

[edit] Specifications (Iris)

Data from Aircraft of the Royal Air Force 1918-57 ^[1]

General characteristics

• Crew: Five
• Length: 67 ft 4¾ in (20.54 m)
• Wingspan: 97 ft 0 in (29.6 m)
• Height: 25 ft 5 in (7.7 m)
• Wing area: 2,461 ft² (228.7 m²)
• Empty weight: 19,301 lb (8773 kg)
• Loaded weight: 29,000 lb (13,182 kg)
• Max takeoff weight: 29,490 lb (13,405 kg)
• Powerplant: 3× Rolls-Royce Condor H-1B piston engines, 675 hp (503 kW) each

Performance

• Maximum speed: 102 knots (118 mph, 190 km/h)
• Cruise speed: 79 knots (97 mph, 155 km/h)
• Range: 691 nm (800 mi, 1,280 km) (with maximum fuel)
• Service ceiling 10,597 ft (3,230 m)
• Rate of climb: 630 ft/min (3.20 m/s)
• Wing loading: 11.8 lb/ft² (57.6 kg/m²)
• Power/mass: 0.0699 hp/lb (0.114 kW/kg)
• Endurance: 4.9 hours

Armament

• 3 × .303 in (7.7 mm) Vickers machine guns, 1 mounted forward and two aft in open cockpits
• Up to 1,984 lb (900 kg) of bombs

[edit] References

[edit] See also

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