Exomax Calculation Sheet

Matthias72 · Post by **Matthias72** » Wed Mar 22, 2006 8:47 am

http://sciacalli.altervista.org/excalib ... sheet.html

I don't know if my excel calculation sheet could be useful, but I want to share it with Excalibur forum community. I done this with my chronograph; you can change some arrows parameters to see energy, drop and trajectory. If you know only arrow weight, with a specific Energy/weight table you can find energy; with energy you can find speed, using first table, changing speed until energy found.
Whit my and my bowhunters friends experience I make 4 sheets of arrow penetration.
The last sheets have been designed for remember shooting results.

ciao
Matthias

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GREYWOLF · Post by **GREYWOLF** » Wed Mar 22, 2006 10:13 am

maddog · Post by **maddog** » Wed Mar 22, 2006 11:08 am

GREYWOLF wrote:

Instead of clicking on, copy and paste the address in the address box and then the right tables will come up.
I had the same problem.

Bill

pokynojoe · Post by **pokynojoe** » Wed Mar 22, 2006 7:04 pm

Mathias, very interesting. You wouldn't be a ballistician would you? If I'm interpreting your graphs and tables correctly, it would seem that the optimum weight of the arrow would be around 400-430? and speed around 310-330 FPS? It would seem your curve is fairly even in this range?

Regards
Joe

ENYAW · Post by **ENYAW** » Wed Mar 22, 2006 9:13 pm

Excellent,Alot of work to produce a lot of info---Thanks

ch312 · Post by **ch312** » Wed Mar 22, 2006 10:27 pm

wut program are u guys using to look at this?

GaryL · Post by **GaryL** » Wed Mar 22, 2006 10:30 pm

ch312 wrote:wut program are u guys using to look at this?

I would guess excel spred sheet....

I can't view it either as I do not use excel.

GREYWOLF · Post by **GREYWOLF** » Wed Mar 22, 2006 10:46 pm

there is a free down load avalible . That is what I had to do, it is just for viewing doc's. created in that format GREYWOLF
Buy the way very nice work
http://www.microsoft.com/downloads/deta ... laylang=EN

ch312 · Post by **ch312** » Wed Mar 22, 2006 11:30 pm

why cant all files download that fast...1100kb/sec

chart thingy looks good to me

GREYWOLF · Post by **GREYWOLF** » Thu Mar 23, 2006 1:22 am

It took some time with my slide rule to conferm your datta , your figures are almost perfect, the only variables not taken into consideration were windage and alertness of the target. An aware deer looking at you has a r/t (reaction time).166 greater than an unaware animal. In your figures,your testing reacation times are off by quite a bit , unless you are shooting 3-D targets that are unaware and up wind from you.
Look into some state F&G statistics on animal behaveour and saftey reaction times. One animal I wouldnt want to go up against would be a female cougar with a cub in close distances under 30 yards. they make a deer seam like a slug !! you wont even have time to say sh$t!! I still say 35 yards max at any alert animal , the math backs it up GREYWOLF

Matthias72 · Post by **Matthias72** » Thu Mar 23, 2006 3:54 am

For my experience I found a very good hunting arrow a 2219 20" equipped with 115 grains muzzy 4 blades, 3 feather 5" 1/16" right. Energy it's near 103 FTP, speed is 316 fps, cut is devasting (I never seen in 20 years a hole so devasting like with muzzy 4 blades), fly is very very accurate (3" at 45 yards). Trajectory is so flat and default sight (I don't use scope) are perfectly tuned for: until 25m, 40m and 50m.

ciao
Matthias