The low-cost fighters to serve tomorrow’s air forces

At this summer's Farnborough Air Show in England, the talk was dominated by the mishaps of one plane: the Lockheed Martin F-35 Lightning II, also known as the Joint Strike Fighter. Due to be adopted by major air forces in the decades to come, it was supposed to be the star of the show. But in the end, the $100m-a-unit jet failed to turn up to its coming-out party after an engine fire in one of the production models grounded the fleet.

But another new jet fighter, which had taken less than two years to design, build and fly, did make it to Farnborough. The Textron Scorpion costs $20m, still not exactly a bargain by most people's standards, but a fifth of the cost of the F-35.

It suggests that not every advanced defence project has to necessarily come in years late and billions over budget – and points to a new twist in not only the future of fighter-jet design, but also in more humanitarian roles that a budget jet could carry out.

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