PC Fizzle Sound

Discussion in 'TSW General Discussion' started by hyperlord, Jul 24, 2019.

  1. hyperlord

    hyperlord Well-Known Member

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    Hi Guys,

    the last couple of days I played a lot on RSN and noticed something, that, of course, happended on MSB and RT, too. I was driving an BR 143 into a tunnel (one with 110 km/h) and at the tunnel entrance, I heard a "fizzle sound". I think it's the same sound like when you put up the pentagraph and it gets contact with the line.

    While this happened, I didn't loose any speed, nor was something "strange".

    My question is now: Should I worry or did I something wrong? Do I have to avoid this to happen?

    It just doesen't feel right ;-)

    Kind regards
     
  2. ARuscoe

    ARuscoe Well-Known Member

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    Sounds like a badly jointed overhead wire that's causing the panto to re-engage but I could be wrong
     
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  3. hyperlord

    hyperlord Well-Known Member

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    Since it (the sound) is happening at the same location on every route I encountered it, I guess your explaination is not far off.
    I'll record a short video of that (hopefully) tonight for demonstration.

    Edit: Actually I recorded the run a couple of days ago and just need to upload that
    Edit2: I was wrong, recorded a ride in RT :D
     
    Last edited: Jul 24, 2019
  4. -PjM-

    -PjM- Well-Known Member

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    I wonder if the the power wire drops to the height of the tunnel roof which causes the pantograph to lower suddenly thus causing the noise? Just a guess.
     
  5. hyperlord

    hyperlord Well-Known Member

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    Here's the fizzte at 110 km/h - got another one right before Altena

     
  6. raildan

    raildan Well-Known Member

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    I think that's just a sound glitch with the BR 155 in tunnels.
     
  7. LastTrainToClarksville

    LastTrainToClarksville Well-Known Member

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    I could barely hear the "fizzle" due to the horn that sounded -- did you do that and could it be the source of the "fizzle"?
     
  8. xD 2Bad4You

    xD 2Bad4You Well-Known Member

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    The "horn" was the Sifa alarm. And i´ve heard that sound on my runs there aswell, so i dont think its related to the Sifa alarm sound.
     
  9. hyperlord

    hyperlord Well-Known Member

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    Yeah, bad timing with SiFa ;-)

    Regarding the tunnel thesis: I'm not sure if there is a tunnel before Altena. If you feeling lucky, try a RB service to Hagen.

    The fizzle sound happened in RT, too. It's happening at one location in open field when you switch to a leftern track, can't remember exactly where that is, maybe after Bitterfeld. I have some recordings of complete runs but I'm not feeling like watching this all again. I remember there is a scenario starting at Bitterfeld, guess what, I'll try that one now...
     
  10. ARuscoe

    ARuscoe Well-Known Member

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    I'll stick to the misaligned overhead line theory rather than tunnels
     
  11. hyperlord

    hyperlord Well-Known Member

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    And I think, you are right.

    I tested yesterday with RT, both scenarios around Bitterfeld (northbound and southbound) and didn't hear the fizzle with the Talent 2. I was too tired to test again with the 143 ...

    Anyway, since nothing is happening to the loco I should stop to worry ;-)
     
  12. hyperlord

    hyperlord Well-Known Member

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    Ok, I'm sure enough to say this: The fizzle only occurs with the DB BR 143 but on multiple routes. Different locos don't "fizzle" at these particular spots.
    BUT I read in the German Wikipedia article about the loco and there was a whole section about the penta and problems with it, just can't recap the details at the moment, so actually this whole thing might be realistic behaviour ...
     
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  13. kalteVollmilch

    kalteVollmilch Well-Known Member

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    Do you happen to have a link to that article? I searched quickly for myself but couldn't find anything mentioning the pantograph
     
  14. hyperlord

    hyperlord Well-Known Member

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    Alright I checked this and somehow weighted too much into this part maybe:

    And from Schleifleistenbruchüberwachung (nice word):

     
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  15. LeadCatcher

    LeadCatcher Well-Known Member

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    And for those that are curious -- from Google translate==:

    Initially, the 143 171 was rebuilt. It received the company number 114 101 and was approved for a top speed of 160 km / h. As part of these conversions, the current pantographs were replaced by new ones of the type SSS 87, which are equipped with a contact edge breakage monitoring system.

    "Im Falle eines Schleifleistenbruches entsteht eine Betriebsgefahr, da der Stromabnehmer nicht mehr sauber an der Fahrleitung entlangläuft"

    In the case of a Schleifleistenbruches creates an operating hazard, since the pantograph no longer runs cleanly along the overhead line

    Interesting translation of "Schleifleistenbruchüberwachung" when translated out of context --- "Grinding hernia monitoring" OUCH!!!!

    Schleifleistenbruches = " Grinding inguinal hernia" - must be tough getting people to volunteer to be drivers for this locomotive :)

    Gotta love Goggle Translate for a laugh.....
     
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