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Author Topic: .257 cal Monocoque PCP  (Read 54059 times))

Offline lloyd-ss

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Re: .257 cal Monocoque PCP
« Reply #180 on: January 13, 2016, 05:54:17 PM »
Lloyd, if you pressurized the Monocoque tube, to use it as a reservoir (and of course it would need the same 0.095" wall thickness as the main reservoir).... would that not remove any compression load from it completely, and instead put it in tension?.... Instead of about 1000 lbs. of compression, I see it as having over 3300 lbs. of tension at my 3800 psi working pressure.... If you loaded the barrel to 1000 lbs. of tension, relative to the outer tube, the outer tube couldn't have any bucklng because it would still be in about 2300 lbs. of tension.... You are just transferring some of the load on the end cap to the barrel instead of the tube....

Bob
Bob, I am not sure that the math is that straightforward, and I think that was John's concern. Still, I think we are working with rather low levels of loading  (except for hoop stress) with the various tubes, and are ok.
Lloyd



You are now pressurized to 4500psi and you are going to let it sit for an entire week?  :o   Either you have an awful lot of patience, or you are just waiting for some more parts to arrive anyway.  ;)
Lloyd
  • Central Virginia
An engineer by nature. The affliction is knowing that everything can be made better. It is easy to make one that works, but it is difficult to make on that works WELL.
My YouTube channel is    Airgun Lab

Offline rsterne

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Re: .257 cal Monocoque PCP
« Reply #181 on: January 13, 2016, 07:18:46 PM »
I can't cut the chamber until I get some bullets.... ATM, the tooling to make the moulds is still being made.... next the moulds.... then I have to cast some bullets.... I'm guessing at least another month before I get to shoot it for the first time....  ::)

Bob
  • Coalmont, BC, Canada
🇺🇦 Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦

Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).

Offline Michael Loar

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Re: .257 cal Monocoque PCP
« Reply #182 on: January 13, 2016, 09:07:43 PM »


My wife is happy for any suggestions so long as she can find it on line, LOL. I guess I am lucky that we are both pretty level headed about the money. But we each have our own weaknesses and respect that.
Lloyd
[/quote]

Lloyd
Mine is about the same way as long as I can find it online for her. LOL We also are both pretty good with our money but also have our weakness and respect as well and I thinks that what makes it last as a partnership.

By the way just as a side note I will let you know the tubes you made me for my 2240 Hipac project are working out very nicely and used quite often. I fill them to 2200 psi and get 25 and 20 shots per gun with the 16 and 14 inch tubes using JSB 10.34s shooting at 875 to 895 fps. Thank you very much for taking on the project for me about a year ago, it took awhile to get them built as my health decided to get in the way for a bit but got that controlled so its back to having fun.

Thanks again and take care.

Mike
  • Oxford, Alabama
Benjamin Marauder 177 in Boyds blaster stock 
Benjamin Marauder25 Wicked Air rifles bottled
Hatsan 22 AT 44S10 long
FWB 124 177 Tuned
FWB 300s Match L 177 Tuned
FWB 300s Match Junior 177 Tuned
Diana 48 177 Vortek Tuned
Xisisco 60C PCP Tuned 22
Xisisco 60C PCP 177 tuned LW barrel
Benjamin Titan NP 22 Tuned GRT trigger
Crosman Titan GP 22 Tuned GRT trigger
Crosman Venom 177 Tuned GRT trigger
Taipan Mutant Standard 22, BSA FFP 4x14x44 scope
TX200 , TL 22mm kit 177
B-40, TL 22mm kit 177
B50 in 51 stock Tuned .177
CH2009 challenger 177
1720T carbine regulated 177
Prod carbine with AR butt stock 22
CZ200 regulated 177
C9 silver streak 20 rocker safety
Crosman 1400 X 2 177 and 22
B28 Mike Melick tuned 25
Hatsan flash 25
Daisy 853 X 5 177
B3-2 177
Benji Maximus 177 Mrod trigger
QB 78/79 177 and 22 HPA bottled
HW Blue Laminate 97 .22cal tuned
1966 Diana model 60 Tyro resealed and tuned




Bikes, Guns and Family is all I need for a good day

Offline William

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Re: .257 cal Monocoque PCP
« Reply #183 on: January 13, 2016, 09:22:18 PM »
I can't cut the chamber until I get some bullets.... ATM, the tooling to make the moulds is still being made.... next the moulds.... then I have to cast some bullets.... I'm guessing at least another month before I get to shoot it for the first time....  ::)

Bob

Oh no, I'm not sure I can stand another month, this is going to drive me crazy lol

Bob,
Congratulations on your build, it sure is getting close to testing that's for sure. Well I guess a month isn't too long!!!!

William
  • Mississippi
Daystate Regal XL .22 cal.
Sumatra .25 Carbine
Woods Walker Marauder Pistol .22 cal. Tack Driver at 30yds
Omega Super Charger 4500 PSI compressor
KalibrGun Cricket- 9mm - It is not a .357- it is 9mm (.3543)
Sam Yang Recluse .357/9mm Stock setup so far.
Benjamin Discovery .22 w/Double Tube Kit, Boyds Blaster stock & BNM Breech. Regulated @ 1800 PSI 3000 PSI Fill Modified
Benjamin Discovery .22 Stock 3000 PSI Modified Soon to be BullPup
Benjamin Titan GP .22
Crosman 2100 .17

Offline lloyd-ss

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Re: .257 cal Monocoque PCP
« Reply #184 on: January 14, 2016, 10:41:26 AM »


My wife is happy for any suggestions so long as she can find it on line, LOL. I guess I am lucky that we are both pretty level headed about the money. But we each have our own weaknesses and respect that.
Lloyd
==============

Lloyd
Mine is about the same way as long as I can find it online for her. LOL We also are both pretty good with our money but also have our weakness and respect as well and I thinks that what makes it last as a partnership.

By the way just as a side note I will let you know the tubes you made me for my 2240 Hipac project are working out very nicely and used quite often. I fill them to 2200 psi and get 25 and 20 shots per gun with the 16 and 14 inch tubes using JSB 10.34s shooting at 875 to 895 fps. Thank you very much for taking on the project for me about a year ago, it took awhile to get them built as my health decided to get in the way for a bit but got that controlled so its back to having fun.

Thanks again and take care.

Mike


Mike, Glad those replacement HiPac adapters and tubes worked out for you.  I don't know if you noticed the pictures of your broken HiPac adapter (the one I broke for you, ha, ha) in the thread about the unfortunate incident with a modified 22xx and HiPac adapter.  I think you dodged a bullet on yours.
Lloyd
  • Central Virginia
An engineer by nature. The affliction is knowing that everything can be made better. It is easy to make one that works, but it is difficult to make on that works WELL.
My YouTube channel is    Airgun Lab

Offline Michael Loar

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Re: .257 cal Monocoque PCP
« Reply #185 on: January 14, 2016, 11:00:38 AM »

By the way just as a side note I will let you know the tubes you made me for my 2240 Hipac project are working out very nicely and used quite often. I fill them to 2200 psi and get 25 and 20 shots per gun with the 16 and 14 inch tubes using JSB 10.34s shooting at 875 to 895 fps. Thank you very much for taking on the project for me about a year ago, it took awhile to get them built as my health decided to get in the way for a bit but got that controlled so its back to having fun.

Thanks again and take care.

Mike


Mike, Glad those replacement HiPac adapters and tubes worked out for you.  I don't know if you noticed the pictures of your broken HiPac adapter (the one I broke for you, ha, ha) in the thread about the unfortunate incident with a modified 22xx and HiPac adapter.  I think you dodged a bullet on yours.
Lloyd

Lloyd
No I missed the post and pics of the broken HiPac adapter other than the ones you sent me of mine that you saved me from experiencing failure with the hard way. We had discussed the observed short comings that I felt was inherent with the products and I am glad you agreed to make new ones for me as I do rest easier knowing that my safety is not at risk when enjoying my guns.

I do agree that I am a lucky soul since we both know what little force it took to break that one of mine with no internal forces being applied to help it fail. if you can find the link to the post on the failure I would like to read it or just the title wording and I can look it up myself.

Here is some pictures of the 16 inch tube gun completed when it was still in the tuning stages. 

Mike
  • Oxford, Alabama
Benjamin Marauder 177 in Boyds blaster stock 
Benjamin Marauder25 Wicked Air rifles bottled
Hatsan 22 AT 44S10 long
FWB 124 177 Tuned
FWB 300s Match L 177 Tuned
FWB 300s Match Junior 177 Tuned
Diana 48 177 Vortek Tuned
Xisisco 60C PCP Tuned 22
Xisisco 60C PCP 177 tuned LW barrel
Benjamin Titan NP 22 Tuned GRT trigger
Crosman Titan GP 22 Tuned GRT trigger
Crosman Venom 177 Tuned GRT trigger
Taipan Mutant Standard 22, BSA FFP 4x14x44 scope
TX200 , TL 22mm kit 177
B-40, TL 22mm kit 177
B50 in 51 stock Tuned .177
CH2009 challenger 177
1720T carbine regulated 177
Prod carbine with AR butt stock 22
CZ200 regulated 177
C9 silver streak 20 rocker safety
Crosman 1400 X 2 177 and 22
B28 Mike Melick tuned 25
Hatsan flash 25
Daisy 853 X 5 177
B3-2 177
Benji Maximus 177 Mrod trigger
QB 78/79 177 and 22 HPA bottled
HW Blue Laminate 97 .22cal tuned
1966 Diana model 60 Tyro resealed and tuned




Bikes, Guns and Family is all I need for a good day

Offline lloyd-ss

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Re: .257 cal Monocoque PCP
« Reply #186 on: January 14, 2016, 11:16:29 AM »
Mike, PM sent.
Lloyd
  • Central Virginia
An engineer by nature. The affliction is knowing that everything can be made better. It is easy to make one that works, but it is difficult to make on that works WELL.
My YouTube channel is    Airgun Lab

Offline Michael Loar

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Re: .257 cal Monocoque PCP
« Reply #187 on: January 14, 2016, 06:19:49 PM »
Mike, PM sent.
Lloyd

Lloyd

Got it "WOW"

Mike
  • Oxford, Alabama
Benjamin Marauder 177 in Boyds blaster stock 
Benjamin Marauder25 Wicked Air rifles bottled
Hatsan 22 AT 44S10 long
FWB 124 177 Tuned
FWB 300s Match L 177 Tuned
FWB 300s Match Junior 177 Tuned
Diana 48 177 Vortek Tuned
Xisisco 60C PCP Tuned 22
Xisisco 60C PCP 177 tuned LW barrel
Benjamin Titan NP 22 Tuned GRT trigger
Crosman Titan GP 22 Tuned GRT trigger
Crosman Venom 177 Tuned GRT trigger
Taipan Mutant Standard 22, BSA FFP 4x14x44 scope
TX200 , TL 22mm kit 177
B-40, TL 22mm kit 177
B50 in 51 stock Tuned .177
CH2009 challenger 177
1720T carbine regulated 177
Prod carbine with AR butt stock 22
CZ200 regulated 177
C9 silver streak 20 rocker safety
Crosman 1400 X 2 177 and 22
B28 Mike Melick tuned 25
Hatsan flash 25
Daisy 853 X 5 177
B3-2 177
Benji Maximus 177 Mrod trigger
QB 78/79 177 and 22 HPA bottled
HW Blue Laminate 97 .22cal tuned
1966 Diana model 60 Tyro resealed and tuned




Bikes, Guns and Family is all I need for a good day

Offline Bill G

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Re: .257 cal Monocoque PCP
« Reply #188 on: January 16, 2016, 09:11:25 PM »
oooooh too exciting Bob.  I can't wait to see the chony results. 

Bill
  • Nicholasville KY
Engineering is the art of modeling materials we don't wholly understand, into shapes we can't precisely analyze, so as to withstand forces we can't properly asses, in such a way that the public has no reason to suspect the extent of our ignorance.

Offline Jr_Explorer

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Re: .257 cal Monocoque PCP
« Reply #189 on: January 19, 2016, 10:25:04 PM »

Bob...  You just developed a revolutionary, quantum leap in airgun technology with the SSG.  Are you going to Disneyland?

"No  I'm going to build from SCRATCH an anti-satelite airgun to use on coyotes at a billion yards.  In my spare time.  Using nothing but some paperclips and duct tape."

I hate you.  I love you.  You go Bob!  LOL!

Seriously...  Thanks for everything you contribute here.  We're not worthy.  We're not worthy.
  • L.A. / Orange County, California
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Offline Michael Loar

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Re: .257 cal Monocoque PCP
« Reply #190 on: January 25, 2016, 08:17:17 AM »
Bob
Any more progress on the 257 made yet like getting your bullet  mold's and casting bullets.

Mike
  • Oxford, Alabama
Benjamin Marauder 177 in Boyds blaster stock 
Benjamin Marauder25 Wicked Air rifles bottled
Hatsan 22 AT 44S10 long
FWB 124 177 Tuned
FWB 300s Match L 177 Tuned
FWB 300s Match Junior 177 Tuned
Diana 48 177 Vortek Tuned
Xisisco 60C PCP Tuned 22
Xisisco 60C PCP 177 tuned LW barrel
Benjamin Titan NP 22 Tuned GRT trigger
Crosman Titan GP 22 Tuned GRT trigger
Crosman Venom 177 Tuned GRT trigger
Taipan Mutant Standard 22, BSA FFP 4x14x44 scope
TX200 , TL 22mm kit 177
B-40, TL 22mm kit 177
B50 in 51 stock Tuned .177
CH2009 challenger 177
1720T carbine regulated 177
Prod carbine with AR butt stock 22
CZ200 regulated 177
C9 silver streak 20 rocker safety
Crosman 1400 X 2 177 and 22
B28 Mike Melick tuned 25
Hatsan flash 25
Daisy 853 X 5 177
B3-2 177
Benji Maximus 177 Mrod trigger
QB 78/79 177 and 22 HPA bottled
HW Blue Laminate 97 .22cal tuned
1966 Diana model 60 Tyro resealed and tuned




Bikes, Guns and Family is all I need for a good day

Offline rsterne

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Re: .257 cal Monocoque PCP
« Reply #191 on: January 25, 2016, 12:41:40 PM »
The tooling for the moulds is nearly done, so it won't be long before the moulds will be available....

Bob
  • Coalmont, BC, Canada
🇺🇦 Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦

Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).

Offline Michael Loar

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Re: .257 cal Monocoque PCP
« Reply #192 on: January 25, 2016, 02:43:30 PM »
Un uh patiently waiting for the first shot from it
  • Oxford, Alabama
Benjamin Marauder 177 in Boyds blaster stock 
Benjamin Marauder25 Wicked Air rifles bottled
Hatsan 22 AT 44S10 long
FWB 124 177 Tuned
FWB 300s Match L 177 Tuned
FWB 300s Match Junior 177 Tuned
Diana 48 177 Vortek Tuned
Xisisco 60C PCP Tuned 22
Xisisco 60C PCP 177 tuned LW barrel
Benjamin Titan NP 22 Tuned GRT trigger
Crosman Titan GP 22 Tuned GRT trigger
Crosman Venom 177 Tuned GRT trigger
Taipan Mutant Standard 22, BSA FFP 4x14x44 scope
TX200 , TL 22mm kit 177
B-40, TL 22mm kit 177
B50 in 51 stock Tuned .177
CH2009 challenger 177
1720T carbine regulated 177
Prod carbine with AR butt stock 22
CZ200 regulated 177
C9 silver streak 20 rocker safety
Crosman 1400 X 2 177 and 22
B28 Mike Melick tuned 25
Hatsan flash 25
Daisy 853 X 5 177
B3-2 177
Benji Maximus 177 Mrod trigger
QB 78/79 177 and 22 HPA bottled
HW Blue Laminate 97 .22cal tuned
1966 Diana model 60 Tyro resealed and tuned




Bikes, Guns and Family is all I need for a good day

Offline Matt15

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Re: .257 cal Monocoque PCP
« Reply #193 on: April 08, 2016, 12:03:44 PM »
How is this project going Bob?
  • Il
Tuned Webley Patriot .25  28 FPE 
Benjamin Trail np pistol: 400 fps
Crosman 2100 12 pumps= 790 fps with 7.9 gr pellet

2017-2018 Squirrel Season
Squirrels: 20


2016-2017 Squirrel Season
The Total was:
15 Fox Squirrels
11 grey squirrels

Offline rsterne

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Re: .257 cal Monocoque PCP
« Reply #194 on: April 08, 2016, 07:35:55 PM »
Still waiting on the moulds.... and impatiently waiting for the first shot which I hope will follow in short order after that....

Bob
  • Coalmont, BC, Canada
🇺🇦 Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦

Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).

Offline Matt15

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Re: .257 cal Monocoque PCP
« Reply #195 on: April 08, 2016, 07:47:28 PM »
Still waiting on the moulds.... and impatiently waiting for the first shot which I hope will follow in short order after that....

Bob

Hope they get to you soon!!
  • Il
Tuned Webley Patriot .25  28 FPE 
Benjamin Trail np pistol: 400 fps
Crosman 2100 12 pumps= 790 fps with 7.9 gr pellet

2017-2018 Squirrel Season
Squirrels: 20


2016-2017 Squirrel Season
The Total was:
15 Fox Squirrels
11 grey squirrels

Offline Michael Loar

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Re: .257 cal Monocoque PCP
« Reply #196 on: April 08, 2016, 08:50:24 PM »
Still waiting on the moulds.... and impatiently waiting for the first shot which I hope will follow in short order after that....

Bob

Hope they get to you soon!!

+2

Mike
  • Oxford, Alabama
Benjamin Marauder 177 in Boyds blaster stock 
Benjamin Marauder25 Wicked Air rifles bottled
Hatsan 22 AT 44S10 long
FWB 124 177 Tuned
FWB 300s Match L 177 Tuned
FWB 300s Match Junior 177 Tuned
Diana 48 177 Vortek Tuned
Xisisco 60C PCP Tuned 22
Xisisco 60C PCP 177 tuned LW barrel
Benjamin Titan NP 22 Tuned GRT trigger
Crosman Titan GP 22 Tuned GRT trigger
Crosman Venom 177 Tuned GRT trigger
Taipan Mutant Standard 22, BSA FFP 4x14x44 scope
TX200 , TL 22mm kit 177
B-40, TL 22mm kit 177
B50 in 51 stock Tuned .177
CH2009 challenger 177
1720T carbine regulated 177
Prod carbine with AR butt stock 22
CZ200 regulated 177
C9 silver streak 20 rocker safety
Crosman 1400 X 2 177 and 22
B28 Mike Melick tuned 25
Hatsan flash 25
Daisy 853 X 5 177
B3-2 177
Benji Maximus 177 Mrod trigger
QB 78/79 177 and 22 HPA bottled
HW Blue Laminate 97 .22cal tuned
1966 Diana model 60 Tyro resealed and tuned




Bikes, Guns and Family is all I need for a good day

Offline LeadBreakfast

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Re: .257 cal Monocoque PCP
« Reply #197 on: July 02, 2016, 04:29:13 AM »
Bob,
Followed this thread intently from the start, but I've been away for a couple of months. Have you had any progress with the molds and/or testing your new project?
  • MN
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Offline rsterne

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Re: .257 cal Monocoque PCP
« Reply #198 on: July 02, 2016, 12:34:29 PM »
I'm still waiting for a chamber reamer, and our Motel is in the busy season now.... I doubt I will get back to this until the Fall.... I do have the moulds for the 100 gr. and have bullets now, however....








Bob
  • Coalmont, BC, Canada
🇺🇦 Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦

Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).

Offline rifle50

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Re: .257 cal Monocoque PCP
« Reply #199 on: July 03, 2016, 02:00:01 AM »
I'm still waiting for a chamber reamer, and our Motel is in the busy season now.... I doubt I will get back to this until the Fall.... I do have the moulds for the 100 gr. and have bullets now, however....








Bob

BOB, What is UP???? Your post above does NOT COMPUTE? On page 7 of this thread from Dec of 2015 you say THIS

Quote--"Yes, the tooling for the moulds is now being made at NOE, and I plan to get a mould for both the 113 gr. and 102 gr BBTs I designed for them.... I already cast my own bullets, and I have a .257 sizing die, so I should be ready once the moulds are done.... Here is what they will look like...."

("I will need the actual bullets in hand before I can cut the chamber in the barrel to the proper length.... I have a chamber reamer that I made previously that is the correct size for this barrel, fortunately...."")

Bob
Last Edit: December 26, 2015, 05:23:55 PM by rsterne

Then in this thread near top of page 10 from Jan 13, you say this
 
Quote-"I can't cut the chamber until I get some bullets.... ATM, the tooling to make the moulds is still being made.... next the moulds.... then I have to cast some bullets.... I'm guessing at least another month before I get to shoot it for the first time...." 

Bob

I am a simple man Bob, but I read you were awaiting molds originally to naturally chamber  specifically for, and already had a reamer that you had made previously, then you get the molds and cast bullets and posted pics of said bullets. No information since and your reasoning now is, awaiting a chamber reamer, that was posted you had already, and is the CORRECT SIZE FOR THIS BARREL????? And was weeks before Motel season??? In my mind it just doesn't compute? Or I am  really confused here?

Carl

« Last Edit: July 03, 2016, 02:01:35 AM by rifle50 »
  • fresno california