1" Bore Rifled Cannons are Not Toys!

[seacoastartillery]

    Double D.,    Do you mean to tell me that after Mr. Gallagher spent almost 20 hours calculating all these various trajectories and producing over 400 pages of data and four very nice trajectory charts, that you are too lazy to relate the two charts on Reply 24 and the two charts on Reply 28?  For goodness sake, they are only 4 replys apart!  It's not like any real searching is necessary.

Tracy

[Double D]

Lazy? 

No, I am not lazy.   I don't have access to the data to put in my spread sheet to generate a simple basic graph showing side by side comparison of the trajectory profiles. 

My cheap little home computer load from a disk ballistic  programs spits the numbers out in a simple exel spread sheet that lets me do just that-build a a graph.  The only problem the ballistic program parameters does not contain data on cannon size projectiles

Four separate graphs in not a comparison.  One graph overlaying trajectories is a comparison.       
 

[Cat Whisperer]

Interesting comparing the trajectories with the 105mm.

http://www.naun.org/journals/mcs/mcs-117.pdf

[seacoastartillery]

 
 
     The 105mm Howitzer trajectory can be compared to the Full size 7” Brooke trajectory and remarkable similarities are evident, after first converting to like units of measure.  Converting meters to yards is easy if you go to this link:   http://www.calculateme.com/Length/Meters/ToYards.htm    We find at 45 degrees elevation that a height of 3,490 m is equal to 3,816.71 yds. or 11,450.13 feet.  The range of the 105mm round is 11,500 m or 12,576.55 yds.  By comparison, at 45 degrees elevation the apogee of the full size Brooke rifle’s projectile trajectory is  9,300 feet and the range of the 7” Brooke is 10,300 yds.
     The trajectory paths are remarkably similar especially when you consider that about 150 years of development separates these two artillery pieces.  The Civil War gun has the added burden of having a projectile that is more than 2.75” larger in dia. than the modern 105.


Tracy