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In Stock SKU: 2626

RAAF & Crown, vintage De Havilland Tiger Moth, G6A/600 4" Brass Aircraft Venturi Tube

The majority of gyroscopic instruments in today's modern aircraft, particularly military and larger commercial aircraft such as the Turn/Bank, Directional Gyro and Artificial Horizon Indicators rely on a vacuum generated by an independent electrical pump or vacum pump driven by the aircraft’s main engines, but this wasn't always the case.

Early vintage aircraft instrumentation achieved their vacuum power source through the use of a simple Venturi Tube mounted on the fuselage or wind strut parallel with the longitudinal axis of the aircraft. 

The Venturi tube works on the same scientific law known as the Bernoulli Effect as an airfoil.

The pressure in a stream of fluid is reduced as the speed of the flow is increased. When that fluid is air passing over the cambered upper surface of an airfoil, the result is lift. When it flows through a Venturi tube, the result is suction.

As air passes through the narrow throat of the tube, its speed increases and its pressure drops.

A small port inside the constricted area taps this pressure to create suction in a line connected to the port. The line is plumbed back to the gyroscopic instruments.

With no moving parts and no power-source other than a slipstream, it is still used today
as relatively inexpensive way of producing the vacuum needed to suck air into the instruments’ inlet port to spin the gyro rotor activating the instrument for smaller recreational and vintage aircraft.

It’s only downside is that it requires that slipstream to operate and is ineffective until the aircraft gains enough speed to create a flow through the tube.

Venturi tubes can be seen in three of the most recognised and popular biplane aircraft - the De Havilland Tiger Moth, ST Ryan Sports and the Boeing Stearman.

Over the course of WWII, Australia built 1070 Tiger Moths under licence to the De Havilland Group which were used to predominantly train much needed pilots as part of the Commonwealth Air Training Scheme.

In the late 1930s, with war rapidly approaching, The Australian government founded the Commonwealth Aircraft Corporation (CAC) after anticipating significant delays in receiving British aircraft for the defence of the country.

By the time production had commenced on the Australian version of the De Havilland Tiger Moth, the CAC were already manufacturing the Australian designed CAC Boomerang single-engine fighter and the rugged two seater trainer/fighter/bomber, the CAC Wirraway. 

This production effort provided a significant kick-start to the fledgling Australian aviation industry as electronic and automotive companies retooled to start manufacturing aircraft components and instrumentation to support the Australian war effort. 

The CAC venture was so successful that they also went onto build Australian versions of the Bristol Beaufighter and Bristol Beaufort as well as a short production run of CAC P51 Mustangs in the closing months of the war.

What a special gift for the aviation enthusiast in your life!  - An original, WWII Australian built De Havilland Tiger Moth, G6A/600 4" Brass Venturi mounted in its 100yr old Mango Wood Display Stand with engraved Plaque, printed and laminated Fact Sheet plus a highly detailed, custom-built 1/72 or larger, 1/48 scale model of this iconic biplane trainer, perched atop its magnetic, removable display arm.

This Australian built, De Havilland Tiger Moth collectable comes complete with detailed Scale Model, Mango Wood Stand & Plaque plus Printed Fact Sheet featuring photo of instrument in aircraft cockpit.

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Your RAAF De Havilland Tiger Moth, G6A/600 4" Brass Venturi Tube, Original Recovery Curios Warbird Collectable includes:

  • Original Warbird instrument
  • Highly detailed hand-built and airbrushed 1/72 plastic scale model of the aircraft,*
  • Hand-crafted and beautifully finished 100yr, Far North Queensland Mango Wood display stand
  • Detailed, 2-sided, printed and laminated Instrument Fact Sheet detailing aircraft and instrument
  • Removable Magnetic Display Arm

*An upgrade to the larger and more detailed 1/48 scale model is also available in the hand-built and airbrushed plastic version for an additional $45 (Click on the 1/48 scale option)

Both the 1/72 & 1/48 scale hand-built and airbrushed plastic models are available with a choice of two Squadron markings and camouflage.

Upon order placement you will receive an email asking for your preferred configuration.

Your complete Recovery Curios Original Instrument Collectable is securely packed and delivery normally takes between 6 - 8 weeks approx.

Did you fly, crew or maintain a Tiger Moth or have a friend, colleague or family member who did? Check out our PERSONALISED ORIGINAL INSTRUMENT COLLECTABLE OPTION here.