HTT-40 wind tunnel tests by year end
The Hindustan Aeronautics Limited (HAL) has revealed that it plans to undertake comprehensive wind tunnel tests to study spin and recovery characteristics for compliance to FAR-23 (aerobatic category) standards on its HTT-40 basic trainer aircraft by the end of this year or early 2015. HAL has announced its requirement for a test agency to design and manufacture the required scale model(s) to achieve all test objectives, which include rotary and static tests towards development of mathematical model for analysing the spin and recovery characteristics of HTT-40. The scope of work includes model design, manufacture, testing, analysis of results and associated mathematical model generation for compliance. HAL has revealed that the HTT-40 weighs about 3,000 kg. The winning vendor will also be required to provide a simulation (mathematical) model of the HTT-40 aircraft to aid HAL in understanding predicted aircraft spin response and recovery controls based on wind tunnel/ other data. Already fighting an uphill battle on the basic trainer front, HAL wants to ensure there are no slippages in the programme. And given the problems it has had with the HJT-36 in terms of spin and stall characteristics, in addition to “very low” engine flying hours before overhaul.