Blackburn Iris

infobox Aircraft
name = Iris
type = Flying Boat
manufacturer = Blackburn Aircraft



caption = The Blackburn Iris Mk III "S1263"
designer =
first flight = 1926
introduced = 1929
introduction=
retired = 1933
status =
primary user = RAF
more users =
produced =
number built = 5
unit cost =
developed from =
variants with their own articles = 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.

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.

Operators

;UK
* Royal Air Force
** No. 209 Squadron RAF

pecifications (Iris)

aircraft specifications
plane or copter?= plane
jet or prop?= prop
ref=Aircraft of the Royal Air Force 1918-57 Cite book|author=Thetford, Owen|title=Aircraft of the Royal Air Force 1918-57|edition= 1st edition |publisher=Putnam |location= London|pages= p.74-75|year=1957|id=
crew= Five
capacity=
length main= 67 ft 4¾ in
length alt= 20.54 m
span main= 97 ft 0 in
span alt= 29.6 m
height main= 25 ft 5 in
height alt= 7.7 m
area main= 2,461 ft²
area alt= 228.7 m²
airfoil=
empty weight main= 19,301 lb
empty weight alt= 8773 kg
loaded weight main= 29,000 lb
loaded weight alt= 13,182 kg
useful load main=
useful load alt=
max takeoff weight main= 29,490 lb
max takeoff weight alt= 13,405 kg
more general=
engine (prop)= Rolls-Royce Condor H-1B
type of prop=piston engines
number of props=3
power main= 675 hp
power alt= 503 kW
power original=
max speed main= 102 knots
max speed alt= 118 mph, 190 km/h
cruise speed main= 79 knots
cruise speed alt= 97 mph, 155 km/h
never exceed speed main=
never exceed speed alt=
stall speed main=
stall speed alt=
range main= 691 nm
range alt= 800 mi, 1,280 km
range more= (with maximum fuel)
ceiling main= 10,597 ft
ceiling alt= 3,230 m
climb rate main= 630 ft/min
climb rate alt= 3.20 m/s
loading main= 11.8 lb/ft²
loading alt= 57.6 kg/m²
thrust/weight=
power/mass main= 0.0699 hp/lb
power/mass alt= 114 W/kg
more performance=*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
avionics=

References

ee also

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