Variants
- R.B.1 / Iris I
- Prototype, wooden hull and mixed construction wings, powered by three 650 hp (485 kW) Rolls-Royce Condor III engines. One built.
- R.B.1A / Iris II
- The Iris I with a new, all metal hull and 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 Royal Air Force. Metal hull and wings. Powered by three 675 hp (503 kW) Rolls-Royce Condor IIIB inline piston engines. Four built.
- R.B.1C / Iris IV
- Conversion of the Iris II with three 800 hp (600 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.
Read more about this topic: Blackburn Iris
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