Junkers JU52 landing and center engine cycle

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


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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.
 

Attachments

  • HB-HOT_ZB_D.de.en.pdf
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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."
 
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.
 
The one with magenta lines drawn all over it?
The German Luftwaffe was always ahead technologically.
^^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)

I watched it at 1080p and it is amazing
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

Sound though comes at the wrong time for a blow-off valve. Occurs when throttle is opened.
Indeed, I noticed that after a few more times watching it

AN-2 - If you get confused or lost, just crash safely
this. is really funny. exactly my type of humor. Thank you for the laugh sir... "..if you get confused"

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.
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
 
^^actually, didn't the SR-71, ... reference to the INS? I could be wrong (it happens sometimes)

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?
 
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?

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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