FLIGHT, M A R C H

15, 1934

r

.

NEW AIRCRAFT

The Dewoitine D.500

A S the outcome of the recent French co mpetition for

•**• fighter aircraft, the Air M inistry has ordered 60

Dew oitine D.500 single-seater fighters. On e-qu arter of the

order will be carried out by the Dewoitine works at

Toulouse, and the remainder by Liore et Olivier at Argen-

teuil, the price per machine being abo ut £3,100 . The

aircraft is an all-mefcil low-wing cantilever monoplane, with

the wing, which is in three sections, built round a single

spar. A ilerons of high aspect ratio extend for nearly the

who le length of the wings. Th e fuselage, which is of

oval section, is of typical Dewoitine monocoque construc-

tion, employing a number of transverse frames, four

longerons and light longitud inal mem bers. Duralum in

sheet is used for the covering . Th e empennage is a duralu-

min structure with smooth sheet covering.

A divided undercarriage of very wide track is used,

employing two oleo pneumatic legs and Vee axles.

Wheel brakes are fitted, and the wheels are almost entirely

enclosed by very neat streamline fairings.

An Hispano Suiza 12 Xrs. geared and supercharged engine

giving 600 h.p. at ground level and 650 h.p. at 16,120 ft.,

is fitted as stand ard. This engine has an ex traordinarily

good power weight ratio, its dry weight being 814 lb.

It seems likely that the production D.500's will have

ethyl-glycol cooling. The radiato r, which is below the

engine, is of the tunne l type. Fuel is carried in two

main tanks, one on each side of the fuselage in the wings.

Both tanks may be dropped during flight.

The pilots' cockpit is over the trailing edge of the wing

and is provided with an adjustable seat, oxygen equip-

ment, wireless and two rifle calibre machine guns with

interrupter gear.

The Dewoitine D.500 has been developed into the types

D.560 and D.57 0. Origina lly th e D.560 was fitted with

braced monoplane wing soon after the machine had been

built .

Length

S p a n . .

H e i g h t

Wing area . .

Weight empty

Weight loaded

Speed a t ground level

3,280 ft. (1 000 m)

6,562 ft. (2 000 m)

13,120 ft. (4 000 m)

16,404 ft. (5 000 m)

19,680 ft . (6000 m)

26,240 ft. (8 000 m)

DEWOITINE D.500

25 ft. 4 in. (7,74 m)

39 ft. 8 in. (12,1 m)

8 ft. 2 in. (2,7 m)

1 7 7 - 5 s q . i t . (16,5 m2)

2,785 lb. (1 266 kg)

3,7521b. (1 705,5 kg )

m.p.b.

197 5

20 4 1

2 1 0 - 3

2 2 4 - 6

230 •

5

2 2 6 - 3

210-8

Climb to 3,280 ft

6,560 ft .

13.120 ft .

16,404 ft .

19,680 ft.

26,240 ft.

32,808 ft .

.. .. 34,120 ft .

R a n g e

Theoretical ceiling

(1 (Hid in}

(2 000 m)

(4 000 mi

(5 000 m)

(60©Om)

(8 000 m)

(10 000 m)

(10 400 m)

k m / h

(318)

(328,5)

(338,5)

(361,5)

(371)

(364,5)

(339,5)

mii i . see .

I

2

5

6

8

13

25

30

ie

48

II

38

19

26

05

31

559-2 miles (900 km)

35,433 ft. (10 800 m)

A Rumanian Trainer: T he LA ,R ,22

CONSTRUCTED by the Socie ta te Anonima Indust r ia

^ A eronautica R omana, of Brasov, R umania, the

I.A .R .22 is a new typ e of school machine which has given

very satisfactory results in tests before the Acceptance

Com mission of the R um anian A ir M inistry. For normal

flying training work the m achine is fitted w ith a D .H .

"G ip sy M ajo r" engine of 130 h.p. , but the fuselage

and wing cellule have been made strong enough for almost

any engine up to 300 h.p. to be fitted, which makes the

Take-off ru n

Landing ru n

47 6 ft. (145 ro)

60 7 ft. (185 m)

The I .A.R.22 Trainer.

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