2026-01-26 – Weekly Engineering News : First jet with variable stator vanes

Last week on the forum, members engaged in detailed discussions about professional development opportunities, with several threads exploring advanced courses and PDH credits. There was a notable interest in practical tools for engineering tasks, from noise diagnostics to fluid dynamics simulations. Conversations also touched on innovative engineering solutions and technologies, such as variable stator vanes in jet engines and efficient power distribution in labs.


This Week’s Hot Topics

  • Looking for advanced site response PDH
    Members are sharing recommendations for courses offering advanced insights into site response—essential for those looking to deepen their geotechnical expertise.
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  • HEC-RAS 2D or SWMM for GI work
    A discussion on the best modeling tools for green infrastructure projects, weighing the pros and cons of HEC-RAS 2D and SWMM.
    Read more here

  • Looking for rigorous PDH on load rating
    Engineers are on the hunt for a comprehensive PDH course that tackles the intricacies of load rating in structures.
    Read more here

  • Karamba/Grasshopper for member sizing
    A practical thread on using Karamba and Grasshopper for structural member sizing, offering tips and experiences.
    Read more here

  • Handheld analyzers for fast noise diagnostics
    This conversation is all about the latest handheld devices for quick and effective noise diagnostics in various environments.
    Read more here

  • First jet with variable stator vanes
    An intriguing look at the historical development of the first jet featuring variable stator vanes and its impact on aviation technology.
    Read more here

  • How long before fuel leaves the pool
    A technical discussion about the timeline and procedures for handling fuel in storage pools.
    Read more here

  • When your QAM constellation needs coffee
    Engineers discuss troubleshooting techniques when dealing with QAM constellations that aren’t performing as expected.
    Read more here

  • Shared 48 V lab bus vs scattered bricks
    A debate on the efficiency and practicality of using a shared 48 V lab bus compared to scattered power bricks in lab setups.
    Read more here

  • Best advanced soil mechanics courses
    The community is exchanging opinions on the top courses for mastering advanced soil mechanics.
    Read more here


Looking forward to another week of engaging discussions and knowledge sharing.

For the VSV angle debates, I’ve been using the free GasTurb demo to sweep schedules against a generic compressor map and spot “surge margin” traps before going to CFD — takes 10 minutes and saves a day of rabbit holes: https://www.gasturb.de/ Not a substitute for rig data, but it’s close enough for PDH-style case studies and quick reviews.

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Quick tip: I keep a tiny spreadsheet that plots VSV angle vs corrected speed and enforces a 6–8% surge-margin floor using a ‘poor man’s’ stage-stacking map — it’s like a smoke alarm for schedule traps before I touch CFD. @mikegreen93 GasTurb is great, but generic maps get optimistic below about 60% Nc; bias the map with your tip-clearance loss or knock 1–2 points off PR to stay honest.

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