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The Don-Bur Aerodynamic Teardrop™

The Teardrop™ Concept

The Teardrop™, first conceived by the Don-Bur design team in 2006, is a unique and innovative commercial vehicle shape that mimics the natural and perfect aerodynamic properties of a liquid teardrop. The streamlined shape generates significant fuel savings without loss of practical load space.

Teardrop trailer brochure

Intellectual Property

The Teardrop™ trailer has the following protection which Don-Bur actively enforces:

  • Granted Patents: GB2443035 and GB2474379.
  • Community Registered Designs: 000867593-0001, 000709423-0002 and 000709423-0001.
teardrop tropfenauto

Shape modification of moving vehicles has been proven for some time to improve aerodynamic performance.

In the 1950's and 60's, aerodynamics played a crucial role to the design of racing cars, where engineers started to recognise the benefits of higher speed and better stability.

Image shown is the 'Tropfenauto' designed by Edmund Rumpler which literally translates as the 'teardrop car'

The Teardrop Shape Today

toyota prius

cycling helmet

Today, although you may not be consciously aware of it, aerodynamic profiling is commonplace. Modern examples include the Toyota Prius and Honda Insight; both of which have exceptionally low aerodynamic drag. 'Brick'-shaped cars no longer exist except in the garages of the most enthusiastic of collectors.

Sports equipment is also often streamlined to reduce power-sapping drag and gain improved performance.

tk maxx rigid teardrop

Why then, almost a century later, has the proven technology not been used in commercial vehicles?  Why is it that HGV's continue to be some of the least aerodynamic shapes and contribute some of the largest proportions of our countries CO2 emissions?

The truth is, no-one previously considered that aerodynamics would play such a huge role on a vehicle 44 times heavier than its passenger-carrying counterpart.

For those that operate them, Teardrop™ trailers and rigid bodywork proudly stand out amongst the crowd; representing companies that demand better efficiency and care about their impact on the environment…


…companies that are arguably now more attractive to those they supply.

Fuel Savings

Current Average: 11.3%

See case studies

Standard 4.2m high trailer

⇧ Wind-tunnel illustration

⇧ Turbulence illustration

Teardrop trailer

⇧ Wind-tunnel illustration

⇧ Turbulence illustration

3d Interactive Models

Click each image to experience the interactive environment.

Curtainsided Teardrop Trailer

Curtainsided Teardrop Trailer

Box Van Teardrop Trailer

Box Van Teardrop Trailer

Box Van Teardrop Rigid Bodywork

Box Van Teardrop Rigid Bodywork

Internal Capacity

There is no effect on load footprint. A standard 13.660m Teardrop™ trailer carries 26 UK pallets.

A standard 4.2m high trailer has 78m3 cubic capacity, compared to a Teardrop™ at over 80m3.

We achieve this by lowering the chassis at the rear which allows us to lower the roof height at the back without compromising volume or rear aperture.

Impact on CO2 Emissions

CO2 emissions are directly proportional to fuel consumed (2.63kgs CO2 / litre Diesel).

One combination travelling 60,000 miles per annum at 8.5 mpg will consume 32,080 litres of diesel and generate 84.37 tonnes of CO2.

A 10% reduction in fuel use will cut CO2 emissions by 8.4 tonnes.

CO2 Calculator

nhs teardrop draw-bar combination

Key Features & Benefits

  • Rapid, viable pay-back
  • Durable aerodynamic bodywork
  • Seamlessly compatible with your fleet
  • No reduction in payload capacity
  • A striking, aesthetically pleasing design