Calculating Results of Airpistol

Guest · Post by **Guest** » Fri Aug 12, 2005 6:27 am

Hello!

I have a question.

How is it possible to calculate the count of a shot on the basis of the coordinates (like scatt).

Here is the example of a shot with a airpistol:

X= 2,77 Y= 2,96 Count: 10,4

I need the calculation for tenth valuation, because i will make a deeper analyze of the scatt results.

Regards

Stefan Seimer
www.schiessportinfos.de

Ed Hall · Post by **Ed Hall** » Fri Aug 12, 2005 7:16 am

I would think you could use a simple formula for the hypotenuse of a right triangle:

a^2 + b^2 = c^2 or (2,77^2 + 2,96^2 = 4.05^2)

(a^2 means a*a or a squared)

to find the distance from center (hypotenuse). That distance should directly relate to the value. I'm pressed for time today, but if this isn't enough info to get you set, I could probably provide more this evening...

Take Care,
Ed Hall
http://www.airforceshooting.org/
http://www.starreloaders.com/edhall/
http://www.geocities.com/ed_ka2fwj/

David Levene · Post by **David Levene** » Fri Aug 12, 2005 7:57 am

It looks like Ed has got it right apart from the fact that you need to deduct half of the pellet diameter from the result.

This obviously gets more complicated close to the centre but my brain is in overload with other things at the moment.

Guest · Post by **Guest** » Fri Aug 12, 2005 8:01 am

Thanks for the quick answer.
Yes, the formula is right for the distance. But I did't got the formula to count the value from the distance.

I need the next step: the formula of getting the value based on the distance.

Regards

Stefan Seimer
www.schiessportinfos.de

David Levene · Post by **David Levene** » Fri Aug 12, 2005 9:28 am

By looking at the ISSF rules you can get the ring diameters for the target you want. The radius is obviously half of the diameter.

The decimal part of the score is obviously one tenth of the distance between the rings. You will probably be best doing a lookup table of the distance for each of the decimal scores.

Post by **Shin** » Fri Aug 12, 2005 10:06 am

Here is the excel formula for air pistol target. dist is the distance to the CENTER of the hit in millimeters.

=IF(dist<=0,10.9,IF(dist>80,0,1+TRUNC((80-dist)/0.8)*0.1))

Spencer C · Post by **Spencer C** » Sat Aug 13, 2005 6:57 am

David Levene wrote:By looking at the ISSF rules you can get the ring diameters for the target you want. The radius is obviously half of the diameter.

The decimal part of the score is obviously one tenth of the distance between the rings. You will probably be best doing a lookup table of the distance for each of the decimal scores.

This is only for decimal shots scored manually - when on EST, the radius is the ring radius + projectile (nominal) radius as the target 'records' to the centre of the shot

For EST 10M, Air Pistol = 8mm per ring: 1/10 ring is 0.8mm (not 1/10 the ring radius)
Shin's formula above is correct

Spencer

stesei · Post by **stesei** » Sat Aug 13, 2005 9:09 am

Thanks a lot!

It works!!! It helped me so much for my work with the Excel Worksheet.

Regards

Stefan Seimer
www.schiessportinfos.de