Photo © Gregg Stansbery
Looking at this image from the ABX thread, I noticed that the engines on the DC-8 have yellow "plugs" in front of the blades. I've seen this on similar aircraft of similar vintage (QF's 707 comes to mind).
What is the purpose of these plugs? Is it to stop the fans windmilling? What is the procedure for putting them in place?
I've only noticed them on older aircraft, so I'm assuming they're simply impractical for modern high-bypass engines (anyone want to fit one to a 777-300ER engine?)