Sunday, June 2, 2013

Your Sunday Morning Jet Noise

C-5 Galaxy.



The engines of the Galaxy made a low-pitched whine that was very distinctive. You can hear it on the video.

8 comments:

  1. Yeah, but…did they ever get that right main fully retracted?

    LRod
    ZJX, ORD, ZAU retired

    ReplyDelete
  2. I saw one at an Airshow years ago. I remember it seeming bigger than a freight train but moving out rather quickly.
    And, a lot of noise.
    w3ski

    ReplyDelete
  3. Aluminum overcast... And they don't ride well either...

    ReplyDelete
  4. Okay, I didn't think to write this, but perhaps it's worthwhile. First of all, I was working when the first delivery model went to CHS (from nearby MGE—Dobbins) and when it landed, it shed a wheel. Given that we were suffering under a rethuglican administration at the time, I thought it an hilariously embarrassing boondoggle.

    Part deux: years later, when I was at ZAU, we had an air guard wing at ORD and I caught a familiarization ride on a KC-135. Among the other things we did, we refueled a C5, and in addition to watching the joinup from the cockpit (a process I'd controlled at work in that track several times), I got to go in back and lay beside the boom operator while tanking the '5. There were two or three breakaways (apparently the Galaxy crew were training) before the last one when they were topped off. I have video of it.

    Then we went out to OFF (Offut in Omaha) and did touch and goes. Never realized, after all the busy transport landings I'd witnessed at various airports, how smoothly a big jet can touch down when there's no one two miles behind and there's still 10,000' of runway ahead. You literally could not tell when the mains touched.

    LRod
    ZJX, ORD, ZAU retired

    ReplyDelete
    Replies
    1. Have you thought about posting theat video to YouTube? I'd link to it.

      Delete
    2. Well, I have to convert it from VHS to something digital, but all of my VHS players have crapped out. Once I sort that out, I need to learn how to convert/upload. Naturally, when/if I do, I'll put it on my ATC website, but also, you'll be among the first to know about it.

      LRod
      ZJX, ORD, ZAU retired
      My ATC site

      Delete
    3. What I'd suggest is that you go to a thrift store, where you may be able to find a working VHS player. From there, it should be a matter of cabling to get it into a DVR of some kind Don't know how you'd get it from the DVR to the Internet, but there has to be a way.

      Delete
  5. Ah yes, the screech of TF39's, the granddaddy of all GE high-bypass turbofans. There are no sound deadening baffles in a TF39, of course. The distinctive sound is because it has a "stage and a half" bypass fan configuration that is unique among all turbofans, created because they initially designed a two-stage bypass fan but couldn't make it work without taking airflow supersonic through the compressor. The 747 engines that they're putting onto the refurb'ed C5's are pretty soulless by comparison, but do provide more thrust and promise to be cheaper to maintain since the TF39 was never sold commercially and thus there's no big supply of spares like for the B52-H, where the Pentagon snarfed up every 707 they could find that was being sent to the scrappers in order to harvest their JT3D engines for spares for the B52-H. One of the few things the perfumed princes at the Pentagon actually did *right*. Musta been a mistake, I guess :).

    ReplyDelete

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