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.

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