STEVE CLAMP

On the Canadair CL-600 Challenger programme at Canadair's Montréal facility, Steve completed the detailed stress analysis of the wing using empirical methods — the structured hand-calculation techniques that defined airframe stress engineering before the widespread adoption of finite element analysis.

The work covered the wing box, spar caps and webs, ribs, and skin panels — sized against the full manoeuvre and gust envelope using established stress-engineering handbooks (Bruhn, Niu, Roark, ESDU and Lockheed/Boeing in-house manuals), beam-column and shear-flow analysis, classical buckling and post-buckling stability checks, and stress-concentration factors for every fastener row, cutout and load-introduction fitting. Fatigue and damage-tolerance assessment was carried out using S-N data and crack-growth methods to satisfy FAR 25 certification requirements.

The CL-600 Challenger went on to become the foundational platform for an entire family of derivatives — the Challenger 601 / 604, the Global Express, and the Canadair Regional Jet (CRJ) series — making this early wing-stress work an enduring contribution to one of the most successful business and regional jet families ever produced.

747 Structural Integrity Program

The Boeing 747 fuselage structure is a masterclass in pressurised shell design — circular frames spaced at 20-inch intervals carry both hoop loads from pressurisation and bending/shear loads from flight and ground conditions. Steve's stress analysis of Bulkheads 2598 and 2464 contributed to the FAA certification evidence package, demonstrating structural integrity at limit loads (1.0×), ultimate loads (1.5×), and residual strength after assumed damage — supporting the 747's outstanding safety record across decades of commercial operation.

The Boeing 787 Dreamliner represented a generational step-change in commercial aircraft design — the first widebody airliner with a majority-composite primary structure, supplied by a globally distributed manufacturing network and assembled at Boeing Everett. Steve's engagement at Everett spanned the era when the 787 programme was ramping up alongside continuing 747-8 production, and his structural work touched components and methodologies shared between the two programmes.

Section 48 is the Boeing nomenclature for the 787's aft fuselage section — the empennage-supporting structure aft of the rear pressure bulkhead. As one of the first major composite primary structures to enter commercial service at scale, Section 48 demanded new analysis methods for impact damage tolerance, fastener bearing in composite laminate, lightning-strike protection and through-thickness load transfer at the metallic-to-composite interfaces.

The Dreamlifter — Boeing's modified 747-400 Large Cargo Freighter — was developed specifically to transport 787 sub-assemblies (composite fuselage barrels, wings, tail sections) between supplier sites in Italy, Japan and the United States and the final assembly lines at Everett and Charleston. The logistics architecture was as much an engineering achievement as the airframe itself.

Steve performed the structural stress analysis of the ATR 42 fuselage, door cutouts, and door structures while working with Aeritalia in Naples, Italy — one of the two founding partners of the ATR consortium (alongside Aérospatiale, France). The ATR 42’s pressurised fuselage presents complex stress distributions around door apertures, requiring rigorous analysis of hoop stress interruption, corner reinforcement doublers, and door surround frames to meet JAR-25 airworthiness certification requirements.

Feather System & Wing Primary Structure

Whilst working at The Spaceship Company on the SpaceShipTwo programme, Steve held two successive lead-stress engineering roles on the suborbital vehicle’s primary airframe.

BLUE ORIGIN

Steve completed stress analysis on fuel valves, manifold and quick disconnect systems.

At LABEN S.p.A in Milan, Italy, Steve developed and produced the stress-analysis methods for the detailed thermal and structural analysis of the BeppoSAX satellite's X-ray concentrator mirrors — the precision-figured grazing-incidence optics that focused soft X-rays onto the on-board detectors.

To address the analysis problem, Steve developed a bespoke finite element program built around 3-dimensional shell elements capable of simulating the coupled thermal, static and dynamic structural behaviour of the concentrator mirrors and their support canisters. Thin-shell formulations are particularly well-suited to grazing-incidence X-ray mirrors, where shell thickness is a small fraction of the structure's overall radius and where capturing through-thickness thermal gradients and out-of-plane bending is essential to predicting figure error under operational conditions.

The analysis suite supported sizing and qualification of the optics against the full ground-handling, launch and on-orbit thermal-cycling environment — predicting mirror figure distortion, modal response and stress margins. BeppoSAX launched on 30 April 1996 and went on to make one of the landmark astrophysical discoveries of the decade: the first identification of gamma-ray bursts as extra-galactic events, work for which the mission was awarded the Bruno Rossi Prize (1998), the Descartes Prize (2002), the Fermi Prize (2010) and the Shaw Prize (2011).

At Marshall of Cambridge Aerospace in the United Kingdom, Steve worked on the structural analysis of Spacelab — the European Space Agency's reusable microgravity laboratory that flew aboard the Space Shuttle on 32 missions between 1983 and 1998, supporting research across space plasma physics, solar physics, atmospheric physics, astronomy, materials science and Earth observation.

Steve performed empirical stress analysis of the Igloo Bay and Payload Attachment Structure — the load-carrying interfaces between the Spacelab system and the Shuttle Orbiter's payload bay. He determined launch and deployment critical load criteria, defining the limit and ultimate load cases that the structure had to withstand across STS ascent acceleration, vibroacoustic and shock environments, and the on-orbit deployment phase.

These critical load criteria were then handed forward to production support stress analysis, where the team used them as the basis for sizing and signing-off the production hardware. Steve also performed the check-stress analysis of the installation brackets — the dozens of bracket interfaces that physically attached experiments, subsystem boxes and supporting equipment to the Igloo Bay and pallet hard-points. Each bracket was sized to carry its experiment's mass times the qualification load factor with margin, and to satisfy the Shuttle Program's stringent payload-safety certification basis.

Professor Tony Marmont pioneered the concept of fuel from air — the synthesis of carbon-neutral liquid hydrocarbon fuels by capturing carbon dioxide directly from the atmosphere and combining it with hydrogen produced via electrolysis from renewable electricity. He funded and supported the development of a pilot plant in the UK that demonstrated the full air-to-fuel pathway end to end, showing that synthetic petrol could be produced using nothing but air, water and renewable power.

Steve and Tony went on to explore development of the technology in the USA, utilising solar and wind as the primary sources of electrical power for the plant. The American development built on the proven UK pilot architecture and assessed scaling pathways under the very different solar resource, wind regimes, regulatory landscape and fuel-market economics of the United States.

The BBC produced a trailer for the programme, included in the main business website. Visit www.fuelfromair.com for the BBC trailer and to learn more about the project.