re: The 2018 next-gen Maruti Swift - Now Launched! Quote:
Originally Posted by Carma2017 I guess it is bit of a stretch to compare the structural rigidity of an Aston Martin with a Suzuki. For a given target of Rigidity ( which I presume is lower for Swift), weight reduction using stronger material is perfectly feasible. The high strength steel benefit is no fairy tale. For Mass market players Aluminum and Magnesium are infeasible options. Hence Steel. I do not know your technical background but there is hell of a lot of stuff that is going on in material research. I guess a plastic automobile engine would also seem like a fairy tale except for the fact that it has been achieved at Lab level. Production en masse is another issue. So, pls do not call stronger materials as fairy tale.
And with due respect ( although NCAP does not deserve it), GNCAP is never going to have it's time in the sun in India. Scaremongering tactics of GNCAP to hard sell EU manufacturers agenda did not work on Government mandarins.Hence BNVSAP. I too am waiting for results of Tests as per BNVSAP for all new and current cars. Let's hold our judgement till then. |
Thank you for writing in, Carma2017! Regarding Aston & Suzuki in the same breath, I think I did mention “…certainly not in the mass market sector, where the Swift is placed in India..” That should segregate the two!
While improved torsional rigidity is perfectly feasible (with small dia. Al tubes, a la the Maserati 'birdcage') and other light weight material - otherwise monocoque & space frame techniques would have been out of business long back! Unfortunately, torsional rigidity is just one factor in car safety, more to do with roll-over considerations than with other aspects. Structural strength for impact absorption is more central to the issue.
And this confusing of mild steel with high-tensile steel is something with which I’m a bit more familiar. In order to save money & increase profits (by saving GRT & increasing cargo dead wt.) using thinner gauge H.T. steel, shipbuilders went wholesale for this material a while ago. The ensuing flood of disasters where ships would develop transverse cracking & breaking-up in two resulted in the expected intense phase of navel-gazing. And this research brought out the information that this steel (with its comparable specific cost to mild steel) had some major short comings, including higher susceptibility to fatigue than mild steel. Mild steel came back into favour. Other special steels (with particular applications) still prove economically non-viable – the corollary with Aston & Audi in the car industry is thus unavoidable.
Undoubtedly a good deal of research is going on in material science – engineering plastics have been around for decades, as has ceramic coating for extreme pressure & temp. applications. Just like interesting research into IC engines has thrown up examples like axial piston engines (the Duke Engine) and the Wankel rotary earlier, among several other more exotic examples. But many of these breakthroughs are presently more interesting as coffee table discussion than as shop floor applications with comparable cost saving benefits.
About my background – I’m an ordinary retired marine engineer with roughly 4+ decades at sea. Of which 10+ years were as Ch. Engr. on Mitsui’s car carrier fleet & the last decade or so, on PSVs & AHTS vessels in the off-shore industry. I’m happier with seat-of-the pants engineering than marking time on a bum-warmer in an office!
How about you?
Regards,
Shashanka
Last edited by shashanka : 5th June 2017 at 11:17.
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