Blackburn B-26 Botha
1938
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Blackburn B-26 Botha

The Botha was designed for Coastal Command RAF as a three-seat twin-engined reconnaissance-bomber, able to carry a torpedo internally or up to 907kg of bombs. Defensive armament comprised a single 7.69mm Vickers machine-gun forward and a dorsal turret with two Lewis guns. The first prototype made its maiden flight on 28 December 1938 and the first production Bothas entered service with No 608 Squadron on 28 June 1940, but remained in first-line service only until November of that year. A handful of operational Bothas also went to No 502 Squadron, but were also withdrawn rapidly. Although the Botha was a failure as a torpedo-bomber - mainly due to being underpowered - large numbers served as pilot, navigation, bombing, gunnery and radio trainers until 1944.

3-View 
Blackburn B-26 BothaA three-view drawing (670 x 624)


Specification 
 MODELB-26 "Botha"
 CREW4
 ENGINE2 x Bristol Perseus XA, 694kW
 WEIGHTS
    Take-off weight8369 kg18451 lb
    Empty weight5366 kg11830 lb
 DIMENSIONS
    Wingspan17.98 m59 ft 0 in
    Length15.58 m51 ft 1 in
    Height4.46 m15 ft 8 in
    Wing area48.12 m2517.96 sq ft
 PERFORMANCE
    Max. speed400 km/h249 mph
    Cruise speed340 km/h211 mph
    Ceiling5335 m17500 ft
    Range2040 km1268 miles
 ARMAMENT3 x 7.7mm machine-guns, 900kg bombs

Comments
Klaatu83, 05.08.2015

The Botha was designed to meet the same specification as the Bristol Beaufort. However, the Beaufort was built with Bristol Taurus engines, producing approximately 1,000 hp, while the Blackburn Botha was forced to make do with smaller and less powerful 800-hp Bristol Perseus engines. As a result the Botha proved to be under-powered and unsatisfactory. After only a few months of front-line service during 1940 all the Bothas were withdrawn and replaced by the Avro Anson, the same aircraft they had been meant to replace, and all the Bothas were relegated to training squadrons.

VinceReeves, 05.03.2013

The Botha was taken off operations because it offered the crew poor visibility in the general reconnaissance role. This was due to the close proximity of the engine nacelles to the fuselage, and the high wing from which they were suspended.

This was the fault of the manufacturer, not the specification. The aircraft was also underpowered, but this would no doubt have been resolved if the design had offered any utility in the role for which it was intended. It didn't.

It's a shame that a more useful role than training wasn't found for the Botha, as it was otherwise well-engineered. Despite its poor reputation, when the training schools bothered to maintain its engines properly, it proved to be perfectly reliable.

peter, 03.02.2012

Is this the aircraft where an inspector reported " gaining access to the cockpit is difficult. It should be made impossible " ? Must swat up my Bill Gunston

leo rudnicki, 15.04.2009

Flying an ugly awkward unsteady underpowered aircraft in training makes you appreciate flying operational types all the more. This a/c was specified by the Air Ministry like most useless aircraft of this era. Fortunately, Bristols persisted with Beaufort/Taurus.

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FACTS AND FIGURES

The position or the engine nacelles and the high wing prevented the pilot from seeing much to either side or the rear.

The short, tapered wings did not provide enough lift for the Botha to carry anything heavy very far.

The cockpit was very poorly designed. It was possible for a pilot flying solo to knock the fuel tank switches off but still start the engines, leading to engine failure a short time into the flight.

The Botha had a high-drag Frazer-Nash dorsal turret as seen on many Sunderlands and some Stirlings. As well as the two guns in this turret there was a single forward-firing gun operated by the pilot.



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