NoName0815
Member
- Joined
- Feb 9, 2007
- Messages
- 10
Hi there,
I´d like to ask the experts here how they do their barrel designs.
I have books about this, but when compared to the reality they have nothing in common.
For example: A PPK Barrel fits after my calculations just the minimum amount of wall-thickness (Using 4140 Steel or eqal). Solid-Works / Cosmos Express says the same: Safety Factor of about 1, which means it would withstand the pressure, but barely.
Shouldn´t there be a safety factor of about 3 to 4 ?
A .22 design is even more confusing !! It is told / written that even a tube of a car antenna could withstand the pressure of a .22. When calculating the required wall thickness of a 22 barrel the results tell me that 2mm of high carbon steel (0,08 Inches) would burst at the average pressure of a .22lr.
And again: Cosmos Express came to the same results.
In reality I saw "The Mythbusters" blowing up some .22 rounds in a car fuse holder. Some of the shells didn´t burst, even if they were unsupported by a surrounding barrel/chamber.
So can someone please bring some light to my darkness ?
Are there some formulas which meet the reality ?
Do you have experiences on that issue ?
How do the manufacturers design and calculate their barrels ?
(They need to have some amount of safety unless they want to get sued)
Thanks for reading this ! And even more thanks for answearing !!!
NoName0815
I´d like to ask the experts here how they do their barrel designs.
I have books about this, but when compared to the reality they have nothing in common.
For example: A PPK Barrel fits after my calculations just the minimum amount of wall-thickness (Using 4140 Steel or eqal). Solid-Works / Cosmos Express says the same: Safety Factor of about 1, which means it would withstand the pressure, but barely.
Shouldn´t there be a safety factor of about 3 to 4 ?
A .22 design is even more confusing !! It is told / written that even a tube of a car antenna could withstand the pressure of a .22. When calculating the required wall thickness of a 22 barrel the results tell me that 2mm of high carbon steel (0,08 Inches) would burst at the average pressure of a .22lr.
And again: Cosmos Express came to the same results.
In reality I saw "The Mythbusters" blowing up some .22 rounds in a car fuse holder. Some of the shells didn´t burst, even if they were unsupported by a surrounding barrel/chamber.
So can someone please bring some light to my darkness ?
Are there some formulas which meet the reality ?
Do you have experiences on that issue ?
How do the manufacturers design and calculate their barrels ?
(They need to have some amount of safety unless they want to get sued)
Thanks for reading this ! And even more thanks for answearing !!!
NoName0815