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bert
PostPosted: Thu Dec 11, 2014 4:23 pm    Post subject: driving range balls Reply with quote

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Joined: 09 Dec 2014
Posts: 1
Location: United States

can you input characteristics of a driving range ball to trajectoware?

is the ball mass and/or ball diameter of a range ball different from a
regular ball?

i want to use a white pinnacle practice ball in trajectoware.
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dtutelman
PostPosted: Thu Dec 11, 2014 8:34 pm    Post subject: Re: driving range balls Reply with quote

Site Admin

Joined: 09 Apr 2007
Posts: 105
Location: New Jersey, USA

Bert also sent me email with the question in more detail. Here is the full text:
__________________________-

i have just started using trajectoware for determining the
net height required for a driving range.

i want to use white pinnacle practice balls.
someone told me the ball mass is 45.927 and the ball
diameter is 1.68 .

i see that these numbers are also the default values of
trajectoware.

can trajectoware simulate practice balls?
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dtutelman
PostPosted: Thu Dec 11, 2014 8:42 pm    Post subject: Re: driving range balls Reply with quote

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Joined: 09 Apr 2007
Posts: 105
Location: New Jersey, USA

Bert, let's review the things about the ball that might be different.

WEIGHT AND SIZE: As you have noted, these are already the default values for TrajectoWare Drive.

BALL SPEED: The conventional wisdom is that range balls are "limited distance". The most obvious way to make this happen is to include enough loss at impact so the ball speed is reduced. The way you do that is to build the ball so its impact with a clubhead has a lower Coefficient of restitution (COR). There is a COR control in TrajectoWare Drive. So, if you can find the number for reduced COR of a range ball, you should be able to plug that into the program.

INITIAL SPIN RATE: I suspect range balls don't have as high a spin as the ball assumed by TrajectoWare Drive. Nothing you can do about this, if it turns out to be a problem.

AERODYNAMICS: I doubt this is a big difference between range balls and normal golf balls. If it is, then there is nothing you can do.

Hope this helps,
DaveT
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