Well, the bow's fast, for sure - but to see how fast, I set up this test. Lacking a chronograph, I had to analyze the sound file with Audacity. I shot at a distance of 25 feet, outdoor temperature 1 degree Celsius. The bow's height was about 4 ft, making the slant distance 25.318 ft, give or take. Calibrated speed of sound, to correct for the time it takes the impact sound to get back to the microphone, is about 1089 fps. The first two shots are with carbon fiber arrows, 435 gr. The last is with a bamboo arrow, about 600 gr. The estimated speeds - and we're talking VERY loosely here, since I could be off by a foot or two for the distance, and perhaps a bit on the time estimate, leading to a fair margin of error - are as follows: Shot 1: 137-151 fps. Shot 2: 126-144 fps. Shot 3: 124-132 fps. Again, these numbers could be VERY wrong, but I've no way to tell for sure. At least until I get a chronograph :-) I'm a little disappointed with these numbers, since it's no faster than the estimate I made of one of my very early bows - I was hoping for some serious speed to repay me for the punishing draw weight, but no such luck, unless I'm grossly in error. I couldn't feel my fingertips for about a half hour after this :-P
Monday, 18 February 2013
Testing the heavy horse-bow's speed, with results!
Testing the heavy horse-bow's speed, with results! Video Clips. Duration : 0.78 Mins.
Well, the bow's fast, for sure - but to see how fast, I set up this test. Lacking a chronograph, I had to analyze the sound file with Audacity. I shot at a distance of 25 feet, outdoor temperature 1 degree Celsius. The bow's height was about 4 ft, making the slant distance 25.318 ft, give or take. Calibrated speed of sound, to correct for the time it takes the impact sound to get back to the microphone, is about 1089 fps. The first two shots are with carbon fiber arrows, 435 gr. The last is with a bamboo arrow, about 600 gr. The estimated speeds - and we're talking VERY loosely here, since I could be off by a foot or two for the distance, and perhaps a bit on the time estimate, leading to a fair margin of error - are as follows: Shot 1: 137-151 fps. Shot 2: 126-144 fps. Shot 3: 124-132 fps. Again, these numbers could be VERY wrong, but I've no way to tell for sure. At least until I get a chronograph :-) I'm a little disappointed with these numbers, since it's no faster than the estimate I made of one of my very early bows - I was hoping for some serious speed to repay me for the punishing draw weight, but no such luck, unless I'm grossly in error. I couldn't feel my fingertips for about a half hour after this :-P
Well, the bow's fast, for sure - but to see how fast, I set up this test. Lacking a chronograph, I had to analyze the sound file with Audacity. I shot at a distance of 25 feet, outdoor temperature 1 degree Celsius. The bow's height was about 4 ft, making the slant distance 25.318 ft, give or take. Calibrated speed of sound, to correct for the time it takes the impact sound to get back to the microphone, is about 1089 fps. The first two shots are with carbon fiber arrows, 435 gr. The last is with a bamboo arrow, about 600 gr. The estimated speeds - and we're talking VERY loosely here, since I could be off by a foot or two for the distance, and perhaps a bit on the time estimate, leading to a fair margin of error - are as follows: Shot 1: 137-151 fps. Shot 2: 126-144 fps. Shot 3: 124-132 fps. Again, these numbers could be VERY wrong, but I've no way to tell for sure. At least until I get a chronograph :-) I'm a little disappointed with these numbers, since it's no faster than the estimate I made of one of my very early bows - I was hoping for some serious speed to repay me for the punishing draw weight, but no such luck, unless I'm grossly in error. I couldn't feel my fingertips for about a half hour after this :-P
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