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Effects of altitude

Discussion in 'Anything Airgun Related' started by Potshot, Jul 29, 2007.

  1. Potshot

    Potshot Engaging Member

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    Hi Everyone,
    Has anyone noticed the effects of altitude on their springer?
    A while ago now,I had to remove some squirrels form a wood about 370m above sea level, and I could notice a difference in the sound and "feel" of the HW80 I was using. There was no apparent shift of zero.(probbably was,I just didn't notice:))
    Does anyone who uses airguns at higher altitudes notice a greater difference?
     
  2. topcat

    topcat Post Whore

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    Location:
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    altitude

    one of my shoots is very high altitude my gun runs about 15 fps slower its a pcp
     
  3. Rockabilly

    Rockabilly Big Poster

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    northeast gods country.
    where is it everest????:rolleyes:
     
  4. Andy

    Andy Administrative Staff Member Founder

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    Springers will shoot slower at high altitude as the air is thinner, so less air to compress.
    But as i understand it a pcp should shoot faster or stay the same, a PCP stores compressed air at a constant pressure.
    The combination of lower air pressure outside and constant pressure in the reservoir means that a PCP will just get faster as the altitude increases.
    Cool air at high altitude would lower the pressure in the reservoir, but as the air is thinner less resistance on pellet.
    So it should get faster or stay the same. :confused:

     
  5. topcat

    topcat Post Whore

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    altitude

    not everest silly billy they run 27 fps slower up there thats why no one shoots there
     
  6. Rockabilly

    Rockabilly Big Poster

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    yet he does
     
  7. topcat

    topcat Post Whore

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    very good old boy
     
  8. Potshot

    Potshot Engaging Member

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    HI all, So if I filled my gun to 200bar,then placed it in a total vacuum,the ambient pressure inside the cylinder would decrease. Caused by the tiny amount of movement in the walls due to the lack of atmospheric pressure on the outside.Is this right???
     

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