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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Swarovski EL Range binoculars - first field tests
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<blockquote data-quote="ColoYooper" data-source="post: 765681" data-attributes="member: 64765"><p>Interesting question about how Swarovski computes the True-Ballistic-Range (TBR). Here is my non-affiliated to Swarovski guess: They must compute the Time-Of-Flight(TOF) for the bullet to travel 800yards along the 30degree uphill slope. This would take into account the effect of gravity slowing the bullet down along the x component, in addition to the normal BC effect of air. Gravity would cause the bullet to arrive at the uphill 800 yard destination with a lower velocity than it would at a level 800 yard position. This would result in a longer (TOF). They would then take the COSINE(30)*TOF to determine the x component TOF and match this value to an equivalent level TOF to determine the TBR. It would be interesting if you swapped positions and read the TBR at a target 30 degrees downhill. I expect it would be less than 693 yards as gravity cause the bullet to arrive at a higher velocity than the 800 yard level position.</p></blockquote><p></p>
[QUOTE="ColoYooper, post: 765681, member: 64765"] Interesting question about how Swarovski computes the True-Ballistic-Range (TBR). Here is my non-affiliated to Swarovski guess: They must compute the Time-Of-Flight(TOF) for the bullet to travel 800yards along the 30degree uphill slope. This would take into account the effect of gravity slowing the bullet down along the x component, in addition to the normal BC effect of air. Gravity would cause the bullet to arrive at the uphill 800 yard destination with a lower velocity than it would at a level 800 yard position. This would result in a longer (TOF). They would then take the COSINE(30)*TOF to determine the x component TOF and match this value to an equivalent level TOF to determine the TBR. It would be interesting if you swapped positions and read the TBR at a target 30 degrees downhill. I expect it would be less than 693 yards as gravity cause the bullet to arrive at a higher velocity than the 800 yard level position. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Swarovski EL Range binoculars - first field tests
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