Hank and I made these from scratch, only the barrel was purchased as a smoothbore. See the link for more info. Cost for materials was ~$1100 each - labor - priceless.
What a marvelous weapon. Thank you very much for the video! I was just wondering: is there any mechanism that prevents the bullet from rolling out of the barrell when aiming downwarts? Sorry if the question should be stupid, I am a layman in regards to (fire)arms.
Thanks for the videos, they're monumentally helpful. What sorts of speed are you seeing out of the projectiles? Do they in any way compare to contemporary BP arms, or even modern big bore air rifles?
Do you think it would be possible to mass produce a simpler airgun (Outerlock, with minimal wood and maybe in an airgun caliber) for a reasonable price? If you could, and bring it down to a more moderate power, I believe it would work well on the European market.
Is this a working model how much would a replica cost I am interested in buying one I take it is hand pump friendly because I think the original only went to 1000 PSI
I suppose they didn't consider making the point when the striker was engaged and the half cock position simultaneous. Would have avoided some safety issues. terribly wonderful, meticulous mechanism.
RelishForRenaissance I wondered that until the gun was functional. The separate click lets you know that the striker has engaged. If they were simultaneous, one would not have confidence that the valve will discharge. There are instances where the mechanism can stick or otherwise malfunction and the first click is absent.
Mr Orro, I've always heard that this mechanism is somehow timed, so there is less speed difference than one would expect from such a basic pcp airgun, but unlike modern pcp's I find that this system pushes the valve stem always the same distance, so my question is: does it really exist such timing? How does it work? Thank you so much!
Yes, all antique airguns of which I'm aware use timed valve systems. "Air Guns" by E. Wolff had an addendum (Airgun Batteries) which schematically categorized dozens of valve designs. Unfortunately, they are not self-regulating and have decreasing muzzle velocity as the reservoir is depleted. Modern PCPs have been refined to have more consistent MV - a sweet spot - as the reservoir pressure declines. see: th-cam.com/video/7lUqy-I9eEg/w-d-xo.html for a high speed video of the action. see: th-cam.com/video/IMzio3oD2tQ/w-d-xo.html for a simple animation.
Thank you so much... I have heard so many myths about the Girardoni, that I started to think that the Girardoni had some machanical regulator on the sear-cam system! Thanks again. I find specially helping the high speed video. I already knew the schematics, from the Beemans works.
Martin, Great video. The Hank you speak about, is that Hank E. from Palmdale? Several years ago he showed me the partially completed receiver and drawings for the Giardoni Rifle. As a matter of fact I was planning on emailing him this evening to inquire about his source for the castings.
Exactly! I wish someone would answer that. Surely it doesn't just fill up the inside of the trigger housing and rely on a tight fit of the side plate and trigger guard. I understand how the pin hits the air resovour and a shot of air comes out but the pin that hits it isn't contained inside a pressure chamber that i can tell. Someone help! It's driving me crazy.
Shane K There is a tube called a Transfer Port between the valve and breech. This video uses drawings from Dr. Beemans website to show a schematic of the Girardoni mechanism: th-cam.com/video/IMzio3oD2tQ/w-d-xo.html
That picture helps some. I'd still love to see how that striker pin sleeve works in detail. I really appreciate you Martin taking time to share this info. I've made a few muzzle loaders. So far the only thing I can't do at least average is engraving. I even do silver wire inlay, I just need to take a class on engraving now. This air rifle has interested me since I first heard about it as a teenager. I'd love to someday make one but I've never even seen one in person, let alone disassembled one. I can't get enough of Martins videos
I think I've got it now. Does the pin on the end of the spoon that hits the valve simply go through a tightly fitting hole through the bronze air transfer tube? Is it that simple that the clearance of the sides of the pin hole is just so tight that not enough air leeks around it to matter?
great videos, extremely informative and interesting
Oh my goodness I'd love to build one of these
Hank and I made these from scratch, only the barrel was purchased as a smoothbore. See the link for more info. Cost for materials was ~$1100 each - labor - priceless.
Make me one I'll.buy it ! Love hunting with old weapons !
What a marvelous weapon. Thank you very much for the video!
I was just wondering: is there any mechanism that prevents the bullet from rolling out of the barrell when aiming downwarts? Sorry if the question should be stupid, I am a layman in regards to (fire)arms.
Good video Martin! Any idea as to if there are any plans available for that fine rifle?
Thanks for the videos, they're monumentally helpful.
What sorts of speed are you seeing out of the projectiles? Do they in any way compare to contemporary BP arms, or even modern big bore air rifles?
+TheBetterManInBlack Check out:
orro.net/2013/05/08/shooting-the-girardoni/
Do you think it would be possible to mass produce a simpler airgun (Outerlock, with minimal wood and maybe in an airgun caliber) for a reasonable price?
If you could, and bring it down to a more moderate power, I believe it would work well on the European market.
what did it cost to have it made and do you have design specifications and diagram
Is this a working model how much would a replica cost I am interested in buying one I take it is hand pump friendly because I think the original only went to 1000 PSI
I suppose they didn't consider making the point when the striker was engaged and the half cock position simultaneous. Would have avoided some safety issues. terribly wonderful, meticulous mechanism.
RelishForRenaissance I wondered that until the gun was functional. The separate click lets you know that the striker has engaged. If they were simultaneous, one would not have confidence that the valve will discharge. There are instances where the mechanism can stick or otherwise malfunction and the first click is absent.
Mr Orro, I've always heard that this mechanism is somehow timed, so there is less speed difference than one would expect from such a basic pcp airgun, but unlike modern pcp's I find that this system pushes the valve stem always the same distance, so my question is: does it really exist such timing? How does it work? Thank you so much!
Yes, all antique airguns of which I'm aware use timed valve systems. "Air Guns" by E. Wolff had an addendum (Airgun Batteries) which schematically categorized dozens of valve designs. Unfortunately, they are not self-regulating and have decreasing muzzle velocity as the reservoir is depleted. Modern PCPs have been refined to have more consistent MV - a sweet spot - as the reservoir pressure declines.
see: th-cam.com/video/7lUqy-I9eEg/w-d-xo.html for a high speed video of the action.
see: th-cam.com/video/IMzio3oD2tQ/w-d-xo.html for a simple animation.
Thank you so much... I have heard so many myths about the Girardoni, that I started to think that the Girardoni had some machanical regulator on the sear-cam system!
Thanks again. I find specially helping the high speed video. I already knew the schematics, from the Beemans works.
just a quick question: when talking about modern PCP's "MV" stand for mass X velocity? Thanks once again!
Of course... silly me. Thanks!
I want one tooo
How could I purchase your amazing Girandoni air rifle?
Martin,
Great video. The Hank you speak about, is that Hank E. from Palmdale? Several years ago he showed me the partially completed receiver and drawings for the Giardoni Rifle. As a matter of fact I was planning on emailing him this evening to inquire about his source for the castings.
Yes, here he is shooting this rifle in a hi-speed video:
Girardoni air rifle shot - Hi-speed
Where can I buy one?
I have one question how does the air get to the breach? Is there a channel? Im missing something here. Ty
Exactly! I wish someone would answer that. Surely it doesn't just fill up the inside of the trigger housing and rely on a tight fit of the side plate and trigger guard. I understand how the pin hits the air resovour and a shot of air comes out but the pin that hits it isn't contained inside a pressure chamber that i can tell. Someone help! It's driving me crazy.
Shane K There is a tube called a Transfer Port between the valve and breech. This video uses drawings from Dr. Beemans website to show a schematic of the Girardoni mechanism: th-cam.com/video/IMzio3oD2tQ/w-d-xo.html
Ahhhhhh that makes more sense thanks martin
That picture helps some. I'd still love to see how that striker pin sleeve works in detail. I really appreciate you Martin taking time to share this info. I've made a few muzzle loaders. So far the only thing I can't do at least average is engraving. I even do silver wire inlay, I just need to take a class on engraving now. This air rifle has interested me since I first heard about it as a teenager. I'd love to someday make one but I've never even seen one in person, let alone disassembled one. I can't get enough of Martins videos
I think I've got it now. Does the pin on the end of the spoon that hits the valve simply go through a tightly fitting hole through the bronze air transfer tube? Is it that simple that the clearance of the sides of the pin hole is just so tight that not enough air leeks around it to matter?