1. The Forum Rules have undergone some minor changes and updates.  Please take the time to read them; it will only take a couple of minutes of your time. By doing so, you lessen the chance of incurring the wrath of the moderation team or making yourself look foolish to other members.

    90% of users posting adverts in the Sales forums need to be reminded to read the rules as their posts are wrong.  This is unnecessarily time-consuming and will no longer happen - if your advert doesn't follow the Sales Rules it will be deleted and you'll have to start all over again.

    To close this box once you've read it (and the Rules), click on the X in the top right-hand corner.

    Thank you.

    AGF Staff



    Dismiss Notice
  2. A reminder of one of the Forum Rules:

    'Behaviour

    Do not make inappropriate or offensive posts - including threats, harassment, swearing, prejudice, defamation, deliberate insults or name-calling, other negative remarks about this forum, its moderators and administrators or your fellow members. Even if this is just your own personal opinion, RESPECT YOUR FELLOW MEMBERS.'

    There have been changes made to our censoring software in an attempt to help with this growing problem.

    Click the X in the top-right-hand corner to dismiss this notice.
    Dismiss Notice
  3. Dear members,

    Our membership (like our country) consists of people from all walks of life; different in far more ways than can be listed here and each with a different view based on their experience of life - regardless of their colour, religion or cultural heritage. Every single person in the UK has been born of mixed race – we are a multi-coloured and multi-cultural country.

    As many of you are aware there are a handful of individuals amongst this membership that persist in making provocative, inflammatory, racist and otherwise offensive comments. This has been happening across the forum to a certain degree but is most especially prevalent in the Adult section.

    The moderation team has tried to stay on top of this, however unfortunately because of the ‘offensive’ nature of much of its content we don’t monitor the Adult section quite as much as perhaps we should. As a result much of this behaviour has gone unnoticed unless it has been reported to us. While the team always intended to take a "light touch" approach to the Adult section it would seem that some people aren’t quite adult enough to be left unmonitored after all.

    This behaviour is, and always has been against Forum Rules as well as the specific stipulations of the Adults forum and it will no longer be tolerated. We feel it's time to draw a line in the sand and as such from this point onward offenders will receive an immediate and permanent ban from the forum.

    In order for us to achieve our goal of restoring the forum to the friendly and tolerant place it once was, we ask that ALL members be mindful of the content they post and help us to stop unacceptable behaviour by using the 'Report' tool at the bottom of any offending post - the results of which can be seen only by Admin/Moderators.

    You should all receive a copy of this message by PM. 

    To close this message box, click on the 'X' in the top-right-hand corner.

    Dismiss Notice
  4. Hotmail block emails from us entering your inbox. Unless you can setup a safe sender you will not get activation emails from the forum. Please use an alternative provider or complain to Hotmail.
    Hotmail addresses include.

    @Hotmail.co.uk @Hotmail.com @outlook.com @Live.com
    Dismiss Notice
  5. Postings on Politics, Religion & Controversial Off-Topic Material

    The majority of users do not want to read about these subjects and people have left the forum as a result of it – this is after all an 'Airgun' Forum. It’s all very well to say they don’t have to read it if they don't want to, but as most of us use the ‘New Posts’ button there is no easy way to avoid it.

    All AGF staff members are in favour of people being able to discuss what they want, but we have to draw the line somewhere if it is upsetting other users. We don’t want to read about these topics either.

    IMPORTANT- The discussion of politics and religion is no longer allowed anywhere on the forum (including the Adult section).  The only exception is if it's airgun related - they must be put in the Airgun Related Politics section..

    We will not tolerate bullying or personal attacks, racism or any other offensive 'isms'. we will remove these topics from the forum, we will not give you an area where you can abuse each other. We will not hesitate to ban offenders.

    To clear this text box, click on the 'X' in the top right-hand corner.

    Dismiss Notice

Pp800 Specifications

Discussion in 'Air Pistols' started by N.Vodden, Jun 26, 2020.

  1. N.Vodden

    N.Vodden Busy Member

    Messages:
    671
    Likes Received:
    1,089
    Location:
    Pontypridd
    Good evening all!

    I'm having a bit of a nightmare setting a PP800 up for a stable and reasonable power curve, so this is a plea to anybody who has a stock UK sourced PP800 for some measurements :)

    If you have a stock, out of the box PP800 and either have these measurements, or are willing to take it apart to measure I would love to check the following..


    Valve spring size - length, number of coils, wire diameter
    Hammer spring size - length, number of coils, wire diameter
    Hammer weight
    Exhaust port size
    Transfer port size

    Also roughly what muzzle energy your combo gives at say full 200bar 150 and 100.

    Thanks in advance to anybody who can help!
     
    Nubble likes this.
  2. Nubble

    Nubble Donator

    Messages:
    6,206
    Likes Received:
    4,533
    Location:
    Floreat Salopia
    Hello Vodden,
    You may know this already but thought it worth the add just in case. It also bumps the post up too... ;)

    Valve spring - 25.41 - don't know - 0.98mm
    Hammer spring - 85mm - I can count em tomorrow - 1.02 (going from memory, again I can confirm)
    Hammer weight - don't know never weighed it
    Exhaust port and t/p you should know already from my PM.

    In the PP800 thread there is a graph showing fps with standard hammer spring in stock set-up CLICK HERE

    It should be the last graph with the comparison against the regged gun.

    Hopefully someone else will chime in.
    Gimme a shout if you want me to count coils etc

    Nubble
    :thumb:
     
    katanga likes this.
  3. katanga

    katanga Engaging Member

    Messages:
    124
    Likes Received:
    66
    Location:
    Blandford Forum, Dorset
    Hello Vodden, if go to Nubble post about the pp800 you found one good and extensive information to help you to get one "stable and reasonable power curve" before is important from you decide the goal you want to reach with this pistol. One important element to get a "stable and reasonable power curve" is put one regulator, Nubble installs one HUMA regulator and I put one LANE regulator boot wi reach one reasonable stable power curve and good number, shoot count.
    There are people in the Nubble post archive good result with the pp800.
    Safe shooting.
    Katanga!:hunting:
     
    Nubble likes this.
  4. N.Vodden

    N.Vodden Busy Member

    Messages:
    671
    Likes Received:
    1,089
    Location:
    Pontypridd
    Hi Katanga :)

    I've read Nubbles PP800 thread many times over (and talked his ear off via pm haha!) but without a regulator, I am struggling to get this gun setup. I see the power curves from people who have gotten them starting 4/5 ftlb around 200bar full pressure and then falling off as it gradually empties, but that is nothing like what I am seeing with mine.

    Mine starts very low and then quickly climbs as the pressure drops and doesn't close the valve as quickly. It's a steep climb until the gun is virtual empty, sub 40 bar. I have tried...

    Regular valve spring
    Weaker cut down valve spring
    Stronger valve spring including ridiculous amounts of preload
    Nine different lengths and strengths of hammer spring
    Different size transfer ports (1.9mm it came with and a 3.5mm borrowed from my CP2)

    ... in every combination you can image and the result is always the same - awful performance at full pressure, ridiculous performance as it approaches low pressure. Setting the gun up to deliver a reasonable power output at its lowest pressure before it starts to fall off, and at full operating pressure (180-200bar) muzzle energy is less than half a ftlb. Setting it to deliver a mid-range output at full pressure, and it quickly starts to skyrocket as pressure drops.

    The thing that is driving me nuts is the simple physics of it.:

    High pressure on the valve at full air pressure requires a stronger hammer, a weaker valve spring or a balance of both to overcome it and deliver a normal output. As the pressure drops, the valve will be knocked open longer letting more air out, resulting in increasing energy so to tame this you need to reduce hammer spring or strengthen the valve spring... but this then means poor performance at full pressure! :mad:

    It just doesn't compute and I cannot understand how this model can possibly operate in a safe and reasonable manner without a regulator o_O


    p.s: above post was checked with a mod that it was ok to discuss :)
     
    Nubble likes this.
  5. katanga

    katanga Engaging Member

    Messages:
    124
    Likes Received:
    66
    Location:
    Blandford Forum, Dorset
    without one regulator is very hard to balance this tree think.
    1.the hammer spring
    2.trasfer port
    3.valve spring
    you have tried small transfer port 2mm, 2/3mm spacer on the valve spring to make short open valve, and light hammer spring?
    the pressure change in the reservoir ends the balance change all time every shot.
    the balance of this 3 think is the key, the regulator helps to stabilize the pressure and maintain stable this balance.
    I use one Lane regulator is good and the price too.
    Attached I send you the installation instruction for the lane regulator.
    I wish every success on this and not hesitate to send me one PM if I am one help.:thumb:
    Regards.
    Katanga!
     

    Attached Files:

  6. N.Vodden

    N.Vodden Busy Member

    Messages:
    671
    Likes Received:
    1,089
    Location:
    Pontypridd
    Yes, I have tried with the transfer port it came with (about 1.9mm), light hammer springs short and long provided by Nubble and others, and washer spacers from 2 up to as much as 8mm on the valve spring without success.

    Thanks very much for that info about the Lane regulator and the offer of help - much appreciated :thumb:

    I was thinking of buying one as they are quite reasonably priced and if I can set it so I have a regulated output, and still have the power output below the limit when it goes off reg that would be ideal.
     
    Nubble likes this.
  7. katanga

    katanga Engaging Member

    Messages:
    124
    Likes Received:
    66
    Location:
    Blandford Forum, Dorset
    ok, if have the solution is the regulator with the regulator set to 80 bars 2mm transfer port, 4 mm of preload on the valve sping, and the 75mm hammer spring of Nubble.
    the first two or three shots no count after consistent 70 shots at 147/142Ms after they slow down until 137/135Ms for then following inconsistent.
    on eBay the lane regulator is £64.95.
    if like other is the Huma or Altaros ask to the forum they experience specifically on regulator on pp800.
    Best regards.
    Katanga.
     
    Last edited: Jun 27, 2020
    Nubble and N.Vodden like this.

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice