New book in Dutch

Eet vet word slank

Eet vet word slank gepubliceerd januari 2013

In dit boek lees je o.a.: * heel veel informatie ter bevordering van je gezondheid; * hoe je door de juiste vetten te eten en te drinken kan afvallen; * hoe de overheid en de voedingsindustrie ons, uit financieel belang, verkeerd voorlichten; * dat je van bewerkte vetten ziek kan worden.

Trick and Treat:
How 'healthy eating' is making us ill
Trick and Treat cover

"A great book that shatters so many of the nutritional fantasies and fads of the last twenty years. Read it and prolong your life."
Clarissa Dickson Wright

Natural Health & Weight Loss cover

"NH&WL may be the best non-technical book on diet ever written"
Joel Kauffman, PhD, Professor Emeritus, University of the Sciences, Philadelphia, PA

Barry Groves tells how Flight distances are measured — the Pursuit of Perfection

You might think that this would be easy — measure from where the arrow is shot to where it landed. But it is not as simple as that. If that were the only criterion, archers could shoot from a point in any direction they chose to get maximum benefit from the wind, for example. This would lead to chaos and, on most ranges, be extremely dangerous. Boundaries would have to be established to prevent this. But then archers could try to get as close to a boundary as possible to get the maximum help from the elements. This could lead to some difficult 'line calls' as it would be impractical to lay out a physical boundary.

Throughout history all nations holding Flight Tournaments have measured distances along a line set from the centre of the shooting line and at right angles to it ? the World Standard. This way of measuring requires a certain amount of skill and accuracy on the part of the archer to ensure that his arrows fall within a reasonable distance of the centre line.

The instrument used for measuring is generally a surveyor's Total Station laser theodolite in the USA and an optical square in Britain. With the British method a prism allows the judge to see an arrow to the side of the line. And a plumb bob dropped to a tape measures the distance. With the theodolite, the actual distance to the arrow is measured and that is multiplied by the cosine of the angle from the centre line to determine the distance credited.

It has been suggested that measuring in this way along a centre line does not reflect the true distance that an arrow has been shot and that, in future, the measurement should from the point it was shot directly to the arrow. If we measure the arrow from where it was shot that would indeed be the exact true distance. However, this would be quite impractical even if there were an 8,000 Leica Total Station Laser theodolite set up at every shooting position.

Here are some examples that I hope will clarify the situation. Please refer to Figure 1 below:


1. Archer 1 shoots an arrow to A, using his skill and control, keeping his arrow parallel to the centre line resulting in an exact true distance of 500 yards. Please note that as the Laser is at the centre line, the result is exactly the same as if measuring from where the arrow was shot.

2. Archer 2 shoots an arrow the distance of B. The exact true distance could only be determined if the Laser were moved to Archer 2's shooting position, set up again and measured to the laser reflector from there. This would measure 450 yards. If it were decided that the measurement should be this actual distance, the laser would have to be moved to every archer's position to measure their arrow distances — an impossible task.

On the other hand, if Archer 2's shot were measured directly to the arrow from the centre line C, it would reward the archer's lack of skill (or outright cheating in taking advantage of the procedure by shooting from a point as far from the laser position as possible) by adding the distance he was along the flight line to the length of his shot.

But by measuring Archer 2's shot using the World Standard method of measuring at a right angle to centre line D, Archer 2 is penalised for his lack of control of the bow by 100 yards.

3. A final example is where Archer number 1 completes his six arrow end and then Archer 3 shoots from the same flight line position but shoots slightly offline to E. Measuring at the World Standard method, these distances would be tied whereas measuring directly to the arrow from the centre line F directly to the arrow from the shooting position, Archer 3 would win. The difference in this example would equate to just a few inches.

The actual distances in real life would not equate to hundreds of yards but they could still be significant.

All forms of archery have their basis in the traditional uses for bows: either to hunt for food or for use in war. If an archer in battle were able to target his arrows on his enemy, while he was still out of range of his enemy's arrows, he would have an advantage. But there was little point in being able to shoot further if he couldn't hit what he was aiming for. Thus accuracy at long distance was also required.

Aside from the skills required in all types of archery, Flight Archers must cast their arrows in a perfect right angle direction from the shooting line parallel to the range centre line in order to obtain the maximum distance.

When measuring the World Standard way, provided that there is a minimum 150 metre range width, boundary lines are not required.

Lastly, if a new form of measurement — directly to the arrow ? were to be adopted, that would invalidate all nations' present Flight Records and those records recognised as World Records.

I hope that has cleared up the business of measuring distances. It's simple really: shoot as far as you can and shoot parallel to the centre line.

Last updated 26 November 2002

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