My comments marked with *** below.
On Tuesday, November 5, 2013 11:49:21 AM UTC-5, [email protected] wrote: > > Ballistics would be affected by: > > 1. Diameter size: smaller diameters have less resistance to travel > against the air > > 2. Kinetic energy: should be x3 times higher with 0.68” since at > that same velocity, it has x3 times the weight > > *** See "ballistic coefficient" and "sectional density". *** Recall http://en.wikipedia.org/wiki/Galileo's_Leaning_Tower_of_Pisa_experiment A 100 lb sphere fell very very slightly faster than a 1 lb sphere of the same material. ... > > Mike, thank you for the data provided. It is a little confusing on the > graph, but it seems like the kinetic energy on the 0.50” balls is falling > out after 75ft. What does it mean at a distance of 0 ft, the height is 40 > inches? Did they fixed the markers at 3.3 ft height and observed how the > ball deflected downward, until it reached the ground? > > *** The site with the link to those graphs is http://www.mcarterbrown.com/50ballistics/50tech.html I believe they fired with the barrel horizontal and measured the vertical drop at each distance. It seems the middle of the 0.68 caliber barrel was 38" above the ground and the 0.50 caliber barrel a half-inch lower. At short ranges the drop is negligible but at long range has to be taken into account. > ... > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
