Research in Progress (RIP) https://rip.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Research in Progress (RIP) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ Non Volatile PM Emissions Measurements of a Honeywell Turbofan Engine https://rip.trb.org/View/1531971 Tue, 14 Aug 2018 14:02:35 GMT https://rip.trb.org/View/1531971 SAE E31 Methodology Development and Associated PM and HAP Emissions Characteristics for a High-Bypass Turbofan Engine https://rip.trb.org/View/1362893 Fri, 24 Jul 2015 01:00:50 GMT https://rip.trb.org/View/1362893