Stefano Soriano Posted October 21, 2014 Report Share Posted October 21, 2014 I did a simulation of pakystunt speargun based on his data.Here the diagrams. Is interesting that the rubber up ( in my model) account for about 75 Joules. http://www.arbaffertus.altervista.org/vela_paky/1.jpg http://www.arbaffertus.altervista.org/vela_paky/2.jpg http://www.arbaffertus.altervista.org/vela_paky/3.jpg Quote Link to post Share on other sites
Pakystunt Posted October 21, 2014 Report Share Posted October 21, 2014 Gracie Stefano  When pretension is 50% and dyneema on first sharkfin shots are low because recoil moves head of gun up before end of spear is out of gun. Gun kicks up rear end of spear and you get low shoot Quote Link to post Share on other sites
Pakystunt Posted October 21, 2014 Report Share Posted October 21, 2014 (edited) some photos Edited October 21, 2014 by Pakystunt Quote Link to post Share on other sites
Pakystunt Posted October 21, 2014 Report Share Posted October 21, 2014 (edited) 2. Edited October 21, 2014 by Pakystunt Quote Link to post Share on other sites
Habanero Posted October 22, 2014 Report Share Posted October 22, 2014 Caro Paky , il fucile spara basso ( al 99,99% ) perché quando il dyneema arriva in testata è ancora vincolato allo sperone e il primo(dyneema ) batte sulla guida RIALZATA in acciaio dando un colpo verso l'alto , TRASCINANDO CON SE LA CODA DELL'ASTA E FACENDO ANDARE BASSO IL TIRO ! ABBASSA la parte superiore di questa guida almeno sino al livello della FRESATURA DELL'ASTA ( o anche un po' più sotto ) vedrai che il tiro VA DRITTO ....Ciao Efisio Quote Link to post Share on other sites
Habanero Posted October 22, 2014 Report Share Posted October 22, 2014 PS. io questo pezzo d'acciaio LO ELIMINEREI !!!!!!!!!!!!!!CIAO ,ciao Quote Link to post Share on other sites
Pakystunt Posted October 22, 2014 Report Share Posted October 22, 2014 PS. io questo pezzo d'acciaio LO ELIMINEREI !!!!!!!!!!!!!!CIAO ,ciao on first picture you can see that gun is not loaded with dyneema, there is piece of spectra which goes to sharkfin to reduce shoots going down Quote Link to post Share on other sites
Pakystunt Posted October 22, 2014 Report Share Posted October 22, 2014 (edited) Caro Paky , il fucile spara basso ( al 99,99% ) perché quando il dyneema arriva in testata è ancora vincolato allo sperone e il primo(dyneema ) batte sulla guida RIALZATA in acciaio dando un colpo verso l'alto , TRASCINANDO CON SE LA CODA DELL'ASTA E FACENDO ANDARE BASSO IL TIRO ! ABBASSA la parte superiore di questa guida almeno sino al livello della FRESATURA DELL'ASTA ( o anche un po' più sotto ) vedrai che il tiro VA DRITTO ....Ciao Efisio Problem is only when gun is loaded to first sharkfin and on 50% pre-tension, when loaded to last sharkfin and normal pretension 20% no problem   gracie Habanero Edited October 22, 2014 by Pakystunt Quote Link to post Share on other sites
agla Posted October 22, 2014 Report Share Posted October 22, 2014 Hello everyone,I follow this forum about two years, I've learned a lot and I thank you for that.This is a new test for static and dynamic targets ... Quote Link to post Share on other sites
Stefano Soriano Posted October 22, 2014 Report Share Posted October 22, 2014 Hello everyone,I follow this forum about two years, I've learned a lot and I thank you for that.This is a new test for static and dynamic targets ...  I like dynamic targets ! Quote Link to post Share on other sites
Pakystunt Posted October 22, 2014 Report Share Posted October 22, 2014  Hello everyone,I follow this forum about two years, I've learned a lot and I thank you for that.This is a new test for static and dynamic targets ...  I like dynamic targets !   Stefano this guy is grendpa of rollerguns in Croatia =D Quote Link to post Share on other sites
Stefano Soriano Posted October 23, 2014 Report Share Posted October 23, 2014 (edited)   Hello everyone,I follow this forum about two years, I've learned a lot and I thank you for that.This is a new test for static and dynamic targets ...  I like dynamic targets !   Stefano this guy is grendpa of rollerguns in Croatia =D   I understand !! So he is the "Orvac" of Croatia. Edited October 23, 2014 by Stefano Soriano Quote Link to post Share on other sites
Pakystunt Posted October 23, 2014 Report Share Posted October 23, 2014    Hello everyone,I follow this forum about two years, I've learned a lot and I thank you for that.This is a new test for static and dynamic targets ...  I like dynamic targets !   Stefano this guy is grendpa of rollerguns in Croatia =D   I understand !! So he is the "Orvac" of Croatia.   Yes something like that Quote Link to post Share on other sites
agla Posted October 23, 2014 Report Share Posted October 23, 2014     Hello everyone,I follow this forum about two years, I've learned a lot and I thank you for that.This is a new test for static and dynamic targets ...  I like dynamic targets !   Stefano this guy is grendpa of rollerguns in Croatia =D   I understand !! So he is the "Orvac" of Croatia.   Yes something like that  Orvac is a great teacher, I am still a student ... Quote Link to post Share on other sites
zavorra Posted November 27, 2014 Report Share Posted November 27, 2014 (edited) Questo come lo interpretate? Sembrerebbe un roller (anzi, per la precisione un mach) che al posto degli elastici sfrutta un pistone interno al fusto https://m.facebook.com/infinitengines Z Edited November 27, 2014 by zavorra Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.