Attn: Physicists, Engineers, Reloaders

[Plankowner]

He is using commas instead of decimal points and the "1" is really a lower case "L" for Liters

So, it reads as 0.83 Liters

 

[shadowdragon]

yeah i figured that out once i noticed your previous post. need to change my font i think because 1 and l look way too similar

 

[sgbrown]

If you're not set on using the physics, you can get the ballistic information on line for all of the ammunition that Winchester sales to the public. You could probably get it for most other ammunition manufacturers as well.

Graphing the ballistic data vs bullet weight and amount of powder should be relatively easy (but a lot of work). The real world data graphs should give you some workable rules of thumb - and some idea of upper limits of current TL performance.

Just a thought.

 

[TheEngineer]

Thanks Plankowner for the translation

I'm somehow tied to German typing....

 

[Icosahedron]

Originally posted by Plankowner:
</font><blockquote>quote:</font><hr />Originally posted by shadowdragon:
Quote:
Use the property of a gas, that 1 mol (a molecular weight unit) always take up 22,4 l under standard conditions.


understand mol, dont understand 22,4 1. is there a number missing? or is it a ratio or what?

He means that 1 mol = 22.4 liters </font>[/QUOTE]It's not a typo. Europe, outside of the UK, uses a comma instead of the decimal point. Seems like it could get confused with the thousands comma to me, but then they cross their zeroes and sevens to prevent confusion with letter O and number one, so who are we to complain?

Makes you wonder how many different conventions would grow across a star empire!

 

[sgbrown]

Originally posted by Icosahedron:
</font><blockquote>quote:</font><hr />Originally posted by Plankowner:
</font><blockquote>quote:</font><hr />Originally posted by shadowdragon:
Quote:
Use the property of a gas, that 1 mol (a molecular weight unit) always take up 22,4 l under standard conditions.


understand mol, dont understand 22,4 1. is there a number missing? or is it a ratio or what?

He means that 1 mol = 22.4 liters </font>[/QUOTE]It's not a typo. Europe, outside of the UK, uses a comma instead of the decimal point. Seems like it could get confused with the thousands comma to me, but then they cross their zeroes and sevens to prevent confusion with letter O and number one, so who are we to complain?

Makes you wonder how many different conventions would grow across a star empire! </font>[/QUOTE]Don't they also use the "." for the thousands etc dividers? 1.900.278,07 for 1,900,278.07 in the UK / American rendering?

 

[TheEngineer]

My personal bad habit is to often use the "." as a comma, too, because thats the way it usually works during programming.
Anyway its true, that we use the "." as a thousands divider

Perhaps I should use the 224E-1 notation next time.

 

[Straybow]

Originally posted by shadowdragon:
so i figure i'll get an "ideal" rifle, the barrel length provides the exact bore volume needed for the powder charge to expand from initial ? to 14.7 psi, at which point the projectile has left the barrel with all the energy the expanding gas can impart without losing energy due to extra barrel length.

You are neglecting friction. I recall reading an article where somebody made a rifle with a very long barrel and sawed off increments until the maximum muzzle velocity was found. I can't remember if it was NATO 7.62x57 or 30-06. It was around 28-30 inches. Most production rifles are 24-26 inches.

This volume is far smaller than the STP volume of the combustion gasses, ~ 0.016 liters.

 

[sinbadsam]

Well I have used Guns, Guns, Guns the system there allows you to change barrel length to achieve optimal barrel length for that particular load of powder.

I used it to min/max the binary weapons I designed at one time for Traveller. But it can do cased, caseless, loose powder etc. But it only converts to Traveller 4 stats.

GGG is available on line, and there is spreadsheet you can down load from Hyperbooks online for $6.00 IIRC.

I had that spreadsheet at one time, but built my own so suit my needs. Now if only I could locate the darn thing,,,have changed computer twice since then...<sighs> I guess I will to begin again.

Luck to you

 

[aramis]

Nitrocelulose: ???
Nitroglycerine: C3H5(NO3)3
Nitroguanadine: H2NC(NH)NHNO2

Plus a bunch of other stuff.

 

[Straybow]

I believe nitrocellulose is just cellulose saturated with nitroglycerine. But I'm no chemical engr.

 

[Anthony]

Nope, nitrocellulose is cellulose nitrate, usually manufactured by treating cellulose with nitric acid. Formula is C6H8(NO2)2O5