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NASA partners with Rolls-Royce on braze joint technology testing

A Reimbursable Space Act Agreement has been signed between NASA and Rolls-Royce (R-R) covering the collaborative development of methods of predicting braze joint performance in critical structures subjected to complex loading. R-R will calculate a Failure Assessment Diagram, referring to the Methodology of Evaluating Margins of Safety in Critical Brazed Joints developed at the NASA Goddard Space Flight Center by Dr Yury Flom. The diagram will be used to define acceptable stress combinations and safety margins for brazed joints and braze repairs. The prediction tool will have numerous applications in the automotive and aircraft sectors.

Welding Journal, vol.93, no.7. July 2014. p.11.

Challenger soars on FAA approval

The US Federal Aviation Administration has certificated Bombardier's Challenger 350 for service entry - but only after the company had to ask for an exemption from existing regulations on protection against uncontrollable high engine thrust. Bombardier successfully appealed on the grounds that such an event is 'extremely improbable'. The company's exemption affects the Honeywell AS907-2-1A engines that power the Challenger 350. These 300 series aircraft with AS907-1-1A engines already have an exemption and, as its appeal to the FAA pointed out, so do certain Airbus, Boeing, Embraer and Gulfstream aircraft. Bombardier successfully appealed for an exemption lasting four years - by which time, it says, a UHT protection system will have been developed, certificated and installed on the entire fleet.

Flight International, vol. 186, no. 5446, 1-7 July 2014. p.10.

Order backlog not a bubble, says R-R

Rolls-Royce chief executive John Rishton is confident that the backlog of new aircraft on order does not amount to a bubble, and that there is a genuine need for the capacity. The company is forecasting deliveries of some 4,000 long-haul aircraft through to 2023 - double the figure for the last 10 years. Rishton said that emerging markets, particularly China, are creating an enormous demand for travel. He added that the Airbus A350 programme is going 'really, really well', but is less optimistic 'at the moment' about sales for the A380. Rolls-Royce intends to return to the single-aisle market, following its decision to allocate resources to the higher thrust Trent XWB 900 and 1000 rather than an engine for the Airbus A320neo.

Flight International, vol. 186, no. 5446, 1-7 July 2014. p.14.

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