De Havilland D.H.71 Tiger Moth
1927
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De Havilland D.H.71 Tiger Moth

In order to carry out research on high-speed flight and to test replacement engines for the Cirrus, de Havilland built in 1927 two small single-seat monoplanes designated de Haviliand D.H.71 Tiger Moth. Such was the degree of streamlining required that it was designed around test pilot Hubert Broad. The two aircraft were entered for the King's Cup Air Race, for it then seemed accepted that any new light aircraft of that time were required to thus prove themselves. However, one was scratched before the race; the other, powered by an A.D.C. Cirrus II engine, was withdrawn during the race due to bumpy conditions.

In August 1927 the first D.H.71, then with alternative wings of only 5.69m span and a new 101kW Gipsy engine, was flown by Broad to a new 100km closed circuit record for aircraft of its class of 300.09km/h. Five days later Broad attempted the world's altitude record for the category, but having no oxygen the limitation was on man and not machine. He reached 5849m before having to give up, although the aircraft was still climbing at over 305m per minute.

In 1930 the first D.H.71 was taken to Australia, but crashed during practice for an air race after suffering engine failure on take-off, killing the pilot. The second airframe, minus engine, was destroyed at Hatfield in an air raid during October 1940.

3-View 
De Havilland D.H.71 Tiger MothA three-view drawing (700 x 593)


Specification 
 MODELD.H.71
 ENGINE1 x A.D.C. Cirrus II inline piston engine, 63kW
 WEIGHTS
    Take-off weight411 kg906 lb
    Empty weight280 kg617 lb
 DIMENSIONS
    Wingspan6.86 m23 ft 6 in
    Length5.66 m19 ft 7 in
    Height2.13 m7 ft 0 in
    Wing area7.11 m276.53 sq ft
 PERFORMANCE
    Max. speed267 km/h166 mph

Comments
sumit gupta, 03.05.2013

I know an aircraft's speed is limited to 250 KIAS below 10,000 MSL. Is there a speed restriction 10,000 and above? I've been told it was the speed of sound, but I can't find any regulation that says that.
amar work in investment company SS Investment solution

Ali Duncan, 15.09.2010

Aircraft like this are a pure delight for anyone who enjoys confounding the opinions of bar room experts, of which I am one(Haha. Imagine my ecstacy on discovering the test version of the Swordfish was known as tsr2. Oh joy, lol.

Ian, 29.04.2010

My mistake....I meant SPAM not SPAN. D'oh!!!

Ian, 29.04.2010

Is there a way that the span can be removed from the comments section?

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Robert Alexander, 07.05.2008

I was at the Queensland Air Museum, Caloundra last week and there on display is a replica airframe of a D.H.71 Tiger Moth which was donated by a Mr.Rob Slight. I have the photo...
Regarding the A/C that was shipped to Australia for a Mr F.K.Bardsly or Bardesley.. its c.n. was 323 whilst G-EBRV was 324. Photograph of G-EBQU at the RAAF base at Pt.Cook, Victoria with Maj.Hereward de Havilland at the controls before going to Mascot,NSW. Full article of the above can be found in the book by R.T.Jackson "De Havilland Aircraft since 1909"

Graeme Parsons, 22.03.2008

The first DH71, G-EBQU was taken to Australia by Geoffrey de Havilland & registered as VH-UNH to a local man.
According to the press of the day, at about 5.00 pm on 17/9/30 a young experienced pilot Dave Smith took the plane up in practice for an aerial derby to be held the following weekend. He failed to strap himself in and experiencing some difficulty with the controls, was thrown out of the plan about 2 miles from Sydney airport,and was killed. The plane was a total wreck.
A report said the aircraft was sensitive to elevator control at high speed & the pilot had used the controls coarsly. There was no engine failure.
Hubert Broad had apparently told both Charles Kingsford-Smith & Charles Ulm, previously in the UK that it was "a nasty machine to fly". (Press photo of aircraft in Aus. available)

Niklas Oberfeld, 14.09.2007

It is my understanding that the DH71 was develpoed primarily as a test-bed for the new De Havilland Gipsy engine. The original Cirrus engine would have been used to get the aircraft airborne and have the test pilots gain expertise in the flight characteristics of the new craft while the prototype Gipsy engine was being built. The Gipsy itself was a special racing version delivering 130 hp while the series Gipsy I engine would be downrated to 100 hp.

James gilbert: the Great Planes @1970 Ridge Press)

Mike Dennis, 29.04.2007

Where can I obtain 3 views or scale drawings of the DH71 please?

Do you have any comments about this aircraft ?

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