Xxplosive42o wrote:Rag, that was... interesting. lol
We do that here. Random off-topic.
In a refutation, I said I am looking for what’s best. By best I mean which barrel "will shoot the darn potato the furthest" to be frank.
And how are we supposed to know that's what your definition of best is?
Because, it certainly isn't my definition of best - not many people here have the same idea of best, that's why so many different styles of cannon exist. And after a while, most people who were originally after range start looking into other avenues. Few experienced spudders put "Range" high up their list of things they feel are important in a cannon - their cannons might well be capable of huge ranges, but they're not bothered about it.
And for many people, best may well include considerations for sound levels or portability.
I understand the graph Jack posted was muzzle velocity, so wouldn’t that show approx. how far the projectile will travel given the trajectory was controlled?
Don't delude yourself into believing spuds have a controllable trajectory. They have about the same level of control as a monkey on crack with a conspiracy theory and the will to impose those ideas on other people with violence.
Also, that test was done with a 1.5" barrel; will a 2.0" differ?
Not by any great amount, at least in terms of volume ratios.
I stated I will be using a chamber with a volume of 236.5" and a barrel of 2" with an unknown length. I just want the best "performance" per say, while not giving a darn about cost of propane.
If range is your only concern, I would recommend a 0.7:1 C:B ratio. Gives essentially the same power as 0.8:1, but slightly quieter, and will produce less muzzle blast, thus a slightly less erratic first trajectory section.
For a 2" SCH 40 barrel, and assuming your chamber volume correct, that would be a barrel of 100 inches in length.
Slightly less than practical, you may well agree - hope you're not planning on taking it anywhere.