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Author Topic: Arado Ar81(v1)  (Read 390 times)

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Type83Fighter

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Arado Ar81(v1)
« on: November 22, 2021, 10:47:00 PM »

(NOTE: Unfortunately, I do not have a copy of 'Aircraft of the Third Reich' in my collection, so I had to scrape together what I could find from reputable sites. Conflicts in information are noted.)

Built as a competitor to the infamous Ju-87, the Arado Ar-81 was a biplane dive bomber designed as part of a program to build new aircraft for the Reich Air Ministry (RLM) to replace the He-50.

Ar81 V1, consisted of a narrow fuselage and tail plane with some dihedral that carried two outboard fins and rudders, intended to improve the field of fire of the tail gunner. However, testing from the end of 1935 revealed serious stability problems. The prototype used Jumo 210C engine with a three-bladed, fixed-pitch unit propeller. The wings were relatively short in span and connected by N-struts outboard. The crew of two with the pilot canopy and observer/machine gunner was behind in a semi-open cockpit. Construction was an entirely metal fuselage, and the airfoil with a mixed structure with partial coating in fabric.

The Ar 81 was noted to be superior in performance to the Junkers Ju 87,  including level speed, maneuverability, range, and especially rate of climb. It reached 4000m in 11 minutes, while the Junkers design required 23 minutes. However, the Ju 87 was a more modern design and its performance could be improved by installing more powerful engines, while the Ar 81 had less development potential. Due to the delay involved in redesigning the tail, the Ar81V3 made its appearance only in the spring of 1936, after the Ju-87 had already been selected.

Technical Data:
Engine: Jumo Junkers 210C, 700HP (NOTE: Sources differ on rated HP as 640)
Propeller: three-blade, fixed-pitch
Wingspan: 11.65 m
Length: 11.25 m
Height: 3.57m
Wing area: 37.60 sq.m
Empty weight: 1925 kg
MTOW: 3,070 kg
Wing loading: 82 Kg/sq.m
Power loading: 4,385 Kg/hp
Max speed: 345 Kmh

Performance Data:
Range: 693 km (431 mi, 374 nmi) at 4,000 m (13,000 ft)
Service ceiling: 7,698 m (25,256 ft)
Time to altitude: at 4,000 m (13,000 ft) in 11 minutes

Armament:
x2 MG-17 (forward-firing, 1 MG 15 7.92 mm, plus 500 kg bombs (NOTE: Sources differ on the guns, some stating a single forward-firing MG-17)
1 × 250 kg (550 lb) bomb on a swinging crutch under the fuselage



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David Prosser

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Re: Arado Ar81(v1)
« Reply #1 on: November 27, 2021, 03:05:14 AM »

I can do a single mission for it if it appears.
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