http://www.metafilter.com/tags/propfan Posts tagged with 'propfan' at MetaFilter. Thu, 09 Jul 2009 13:18:37 -0800 Thu, 09 Jul 2009 13:18:37 -0800 en-us http://blogs.law.harvard.edu/tech/rss 60 http://www.metafilter.com/83134/Open%2DRotor%2DJet%2DEngine%2Dwith%2Da%2DMohawk Ultra-High Bypass (UHB) or "<a href="http://en.wikipedia.org/wiki/Propfan">propfan</a>" jet engines <a href="http://www.youtube.com/watch?v=gfqoUetKv0E">received attention in the late eighties</a> as an <a href="http://pdf.aiaa.org/preview/1988/PV1988_3082.pdf">economical</a> and greener alternative to currrent GTF and ATF jet technologies. Adoption was partially prevented by industry fears that the external propellers would being seen as a step backwards. Evidently, General Electric and NASA are <a href="http://inventorspot.com/articles/ge_and_nasa_revive_open_rotor_jet_engines_30023">reinvesting in the technology</a>. tag:metafilter.com,2009:site.83134 Thu, 09 Jul 2009 13:18:37 -0800 engine ge generalelectric jet jetengine nasa openrotor propfan udf uhb ...possums