I’m not seeing the 3 pipes... I am much more familiar with gas turbines and not jet engines, so I went looking for some info. I did find this nice YouTube video explaining the engine.roon wrote: ↑Wed Sep 26, 2018 12:38 amStill wonder why there's three pipes connecting the airbox to the shroud around the compressor. The outer two pipes are smaller than the center pipe. Thoughts? Might say cooling, BOV, or even a dual entry two-sided impeller. Think: one pipe to the front side as normal, and two pipes leading to the rear half. Triple entry, two-sided impeller.
roon wrote: ↑Tue Sep 18, 2018 8:54 pmhttp://www.enginehistory.org/Museums/CW ... ne1005.jpg
The pipe coming from the front is the starter air.