Prof. Prodyut Das 2

  Lessons from the Tejas, ALH, HJT 36                                                                     Prof. Prodyut Das Iss2. Dated 09/05/2024 - with a new photograph and comments about spinning of  the HJT 36 and the untidy job we have got and ways to improve it. The first flight of the Tejas Mk1A was fortunately a muted affair. Someone had the good sense not to have the usual hoop-la; For all our self- congratulation on X the Aeronautical World will look at the flight differently; to them it will be that 40 years after the first release of funds the Indians have finally got a fighter which -to use the homely Bengali phrase- “ paat-ey deya jaai” i.e. can be put on the dinner plate. My using the phrase is no endorsement of the Mk1a. It means that the Mk1a is perhaps worth allotting hardened shelters at a few of the quieter-front line airbases so that further trials prior to induction can go on. (Note 1). The Mk1A still needs more “improvements” dictated by service experience an

  The HJT 36 -    a 2024 review    Iss. 7                                        Professor Prodyut Das It is interesting to be mentioned in Twitter X and more surprising when the reference is in positive terms. One can imagine my surprise when something I had said ten years ago was referred to. https://twitter.com/Indranil_Roy and   https://twitter.com/hvtiaf_bharat   referred to my blog posts in 2014 on the then subject of the HJT 36 spinning trials. The references are; 1.       for Indranil’s post of 2019 in Delhi Defence Review  https://delhidefencereview.com/2019/04/23/hals-hjt-36-intermediate-jet-trainer-rises-from-the-ashes-a-detailed-look/ 2.         2014   Prof. Prodyut Das 2:  Some Notes on the Forthcoming Spin Trials of the ... https://prodyut7.blogspot.com/2024/03/some-notes-on-forthcoming-spin-trials.html?spref=tw 3.         Prof. Prodyut Das 2:  Some Notes on the Forthcoming Spin Trials of the ... part 2 is at https://prodyut7.blogspot.com/2024/03/prof.html?spref=

  Some Notes on the Forthcoming Spin Trials of the HJT 36 Introduction These notes are being put up for those who may be following the forthcoming spin trials of the HJT 36 Sitara. There is some Physics/Math but it is High school stuff and helps in understanding the conclusions given. No claims are being made as to accuracy of prediction though some of the points are interesting and indisputable. A quick review of the Programme The HJT 36 programme is another of those Defence related mysteries. Here was a programme which showed, briefly, what standards we are capable of. Excellently managed (Take a bow, Yogesh Kumar!) it went from sanction to first flight in 3 years which is about good as it gets, only to hit a sandbank when the engine was changed. Talk of changing horses in midstream! Mind you, the idea was not bad. The French, seeing an opportunity, reportedly wanted higher prices for their Larzac and as usual there was some weight increase/specifications change. The Saturn AL-55I wa