Junkers JU52 landing and center engine cycle

Discussion in 'Hangar Talk' started by Tantalum, May 9, 2019.

  1. Tantalum

    Tantalum En-Route

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    Hi All, cool video here:

    Anyone know why around the 0:50 mark the center engine is cycled? You can hear what sounds like maybe a turbo blow off value when he does this? Any ideas?
     
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  2. Sac Arrow

    Sac Arrow Touchdown! Greaser!

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    Is that a BMW insignia on the yoke?
     
  3. ktup-flyer

    ktup-flyer En-Route

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    Yes. BMW engines
     
  4. Peter Anderson

    Peter Anderson Pre-takeoff checklist

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    What is that big paper thing on the right hand yoke???


    Sent from my iPhone using Tapatalk Pro
     
  5. Sac Arrow

    Sac Arrow Touchdown! Greaser!

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    The one with magenta lines drawn all over it?
     
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  6. SoonerAviator

    SoonerAviator En-Route PoA Supporter

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    The German Luftwaffe was always ahead technologically.
     
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  7. Spring Ford

    Spring Ford Pre-takeoff checklist

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    The video is very high resolution. I watched it at 1080p and it is amazing. Youtube are offering 4k but my computer can't really cope with that.

    Aircraft is HB-HOS which is presently grounded after the discovery of corrosion in the wreck of HB-HOT. Corrosion not necessarily related to the crash.

    Machine translated preliminary report.
     

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  8. Spring Ford

    Spring Ford Pre-takeoff checklist

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    Engine is apparently supercharged. Sound though comes at the wrong time for a blow-off valve. Occurs when throttle is opened.

    https://en.wikipedia.org/wiki/BMW_132
     
  9. Spring Ford

    Spring Ford Pre-takeoff checklist

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    The same youtube poster has other aviation videos including a full ju-52 flight. Perhaps the one above is an edit from it?

    45mins


    How to land the Antonov AN-2 Airplane - Cockpit View


    AN-2 - If you get confused or lost, just crash safely -

    https://en.wikipedia.org/wiki/Antonov_An-2
    the pilot's handbook reads: "If the engine quits in instrument conditions or at night, the pilot should pull the control column full aft and keep the wings level. The leading-edge slats will snap out at about 64 km/h (40 mph) and when the airplane slows to a forward speed of about 40 km/h (25 mph), the airplane will sink at about a parachute descent rate until the aircraft hits the ground."
     
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  10. Craig

    Craig Line Up and Wait

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    Be willing to bet that the center engine is the only one with the air compressor on it, for the brakes. Cycle it to verify the compressor comes on and off as it should. You can hear the air system vent at one point.
     
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  11. Tantalum

    Tantalum En-Route

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    ^^actually, didn't the SR-71, or maybe U2? have a very primitive magenta-line moving map display? I seem to recall seeing a video that the flight plan was loaded into a tape spool and it would unwind based on reference to the INS? I could be wrong (it happens sometimes)

    Right?! I like the style of it, feels like you're there, and not all #Instagram youtubed out "SMASH THE LIKE BUTTON AND SUBSCRIBE" - none of that nonsense

    Indeed, I noticed that after a few more times watching it

    this. is really funny. exactly my type of humor. Thank you for the laugh sir... "..if you get confused"

    YES! that makes sense, and does similar to the air brake sound you hear on trucks.. still odd timing with it going off as the throttle is advanced.. but that makes much more sense given that it was done pre landing
     
  12. Spring Ford

    Spring Ford Pre-takeoff checklist

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    Parts of the German Language check list can be easily read in the video. Google translate ...
     
  13. Spring Ford

    Spring Ford Pre-takeoff checklist

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    As I recall SR-71 had some kind of automatic astro-nav system. Star finder thing. Maybe they flew high enough for it to work in daytime?
     
  14. ARFlyer

    ARFlyer En-Route

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    Yep! It’s currently on display at Air & Space. It used a gyro stabilized telescope that could auto-locate the “Selected Stars” and update the INS computer. They designed it due to the fact they didn’t want the SR-71 reliant on jammable navigational sources.

    https://timeandnavigation.si.edu/mu...nics-nas-14v2-astroinertial-navigation-system
     
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