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Air Gun Home Forum Index » Picture Gallery » Pump....I has this idea....    View previous topic :: View next topic  Pump....I has this idea....   Posted: Thu Apr 01, 2010 1:52 am kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Well I have had for a while in all sorts of diffrent flavors.. desided this is the flavor in like the best... the numbers... bore/stroke 53mm x170mm swept volume 345cc pre filled to 120psi from compresser 3000cc/3lts compressed 204 times to give 145cc @ 3000psi... max presure on piston head 12,000psi. max force pushing piston 44,000psi 32,000psi over/above min requirement. another week ..i should have a working pump.. If it works as I hope ..I will transfur it on to a air over hydrulic jack ..so its just push a button.. Pete   Posted: Thu Apr 01, 2010 3:23 am Mark5043 Silver Status Member Joined: 12 Apr 2009 Posts: 1379 That's a great idea there Pete.One pump,and your filled up.More time to pack the ice box with bunnies......better stock up on pellets...   Posted: Thu Apr 01, 2010 6:12 am Alstone Moderator & Site Supporter Joined: 01 Mar 2007 Posts: 4139 Location: Linconshire, ENGLAND Your getting there Pete. Your like a dog with a bone when it comes to hydraulics, this could be a very interesting project. Al _________________   Posted: Thu Apr 01, 2010 10:55 am rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC Let me see if I understand the numbers.... Swept volume = 375 cc (that's what I get using your bore & stroke) Starting pressure 120 psi (from air compressor) Ending pressure 3000 psi (204 Bar) Compression ratio of booster = 3000 / 120 = 25:1 Output volume = 375 / 25 = 15 cc (not 145 cc) (Using your swept volume of 345 cc it works out to 13.8 cc) Did I make a mistake somewhere?.... I love the idea and was working on a similar idea for a while using parts from Princess Auto.... Where I ran into the problem was with the valving required because it would take nearly 10 strokes to fill a Disco, even if there was only a 10% pumping loss.... You can purchase pressure boosters that are air operated (120 psi in, 3000 psi out).... but they start at well over $1000.... The cost has to be somewhere.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Thu Apr 01, 2010 4:40 pm kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand rsterne wrote: Let me see if I understand the numbers.... Swept volume = 375 cc (that's what I get using your bore & stroke) Starting pressure 120 psi (from air compressor) Ending pressure 3000 psi (204 Bar) Compression ratio of booster = 3000 / 120 = 25:1 Output volume = 375 / 25 = 15 cc (not 145 cc) (Using your swept volume of 345 cc it works out to 13.8 cc) Did I make a mistake somewhere?.... I love the idea and was working on a similar idea for a while using parts from Princess Auto.... Where I ran into the problem was with the valving required because it would take nearly 10 strokes to fill a Disco, even if there was only a 10% pumping loss.... You can purchase pressure boosters that are air operated (120 psi in, 3000 psi out).... but they start at well over $1000.... The cost has to be somewhere.... Bob LOL..No I did...375 is correct 145!... I missed the dot = 14.5cc The other way I will use it is to boost the pressure of the argon bottle when it drops to below a useable pressure hook the argon bottle to it instead of a compresser.. could use a scuba tank as well then yer can use yer bottle to almost empty.... Pete   Posted: Thu Apr 01, 2010 6:02 pm fritz Silver Status Member Joined: 25 Nov 2008 Posts: 2444 Location: New Jersey- outside of Philadelphia Cool. Even if it only pumps 15cc at 3,000psi... it's still quite a bit. What is the capacity of a Disco or Mrod? And how long does a full stroke cycle take? Even a slow stroke is still putting a lot of air in the gun. Might even be effective for a home fill on a SCBA setup... if you had an air purifier to remove all moisture. _________________ "I never set out to be wierd, it was always everyone else who called me it" -Frank Zappa Speed is impressive, accuracy is deadly. It's not that I'm not a people person, it's just that I'm not a stupid people person.   Posted: Thu Apr 01, 2010 7:35 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC A Disco reservoir is 135 cc.... an MRod reservoir is 215 cc.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Thu Apr 01, 2010 8:34 pm fritz Silver Status Member Joined: 25 Nov 2008 Posts: 2444 Location: New Jersey- outside of Philadelphia That's not bad at all. Now how long does a pump cycle take, Pete? _________________ "I never set out to be wierd, it was always everyone else who called me it" -Frank Zappa Speed is impressive, accuracy is deadly. It's not that I'm not a people person, it's just that I'm not a stupid people person.   Posted: Thu Apr 01, 2010 11:58 pm kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Hi..Now keep in mined you only shoot yer gun down to around half volume/ pressure..So a 215cc res will only require a a 107cc top up around 6 or 7 stroke cycles... I have not tryed but would think around 1 minute to do a pump cycle.. Depending how easy it is ...maybe possable to put a crank unit on it so yer just wined a handle   Posted: Fri Apr 02, 2010 9:46 pm Jaxom Senior Member Joined: 06 Aug 2008 Posts: 927 Could you refill a scuba tank with this? _________________ .22 2300kt Crosman Custom   Posted: Fri Apr 02, 2010 10:12 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC If I got the math right.... 815 cycles for an 88 cu.ft. 3000 psi tank.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Sat Apr 03, 2010 12:05 am kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand rsterne wrote: If I got the math right.... 815 cycles for an 88 cu.ft. 3000 psi tank.... Bob yer a tank would be a bit ambishus.. but if the tanks not empty/ just a few 100 psi top up its possable... pete most bit done now..   Posted: Sat Apr 03, 2010 5:38 pm kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Got the mounting flanges done along with the piston & seal...Seal has a 2* tapper with the top .5mm larger than the bore bottom is size for size..there will be a filler plug in the cup to desplace volume & hold the seal to the piston.. Pete Pump....I has this idea....     Air Gun Home Forum Index » Picture Gallery You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT - 5 Hours   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum Main Forums----------------AirGunHome Q&AGeneral Air Gun Questions and TopicsPicture GalleryTarget Shooting: Casual, Fun and CompetitionHunting, Pest Control, Varminting People/Events/Airgun Issue Discussion----------------Introduce YourselfThe BS TopicClubs/Events/Regional/Political Airgun Issues Maintenance, Modification and Reviews----------------RiflesPistolsAntique, Collector and Novelty AirgunsBB GunsPellets/AmmoOpticsAccessoriesAirgun Smithing Buy, Sell or Trade Forums----------------For SaleWant to Buy   Note: If you are seeing "Please enter your username and password to log in." 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