![]() A typical 7 iron swung at 78 MPH (the average on the LPGA) results in a carry of 141 yards, a distance of 1.8 yards of carry per MPH of club head speed. Again as a point of reference, the average swing speed on the LPGA is 94 miles per hour which works out to an average carry distance of 220 yards.Īs the swing speed decreases with the shorter clubs the carry distance per MPH is also reduced. Just as a point of reference the average swing speed on the PGA Tour is 112 MPH, which translates into an average carry of 269 yards.Īt lower swing speeds, around 90 miles per hour, each MPH of club head speed generates approximately 2.3 yards of carry. With the driver each MPH of club head speed generates approximately 2.4 yards of carry if the swing speed is in the 110 MPH range. If the club head passes your hands at impact (flipping) the effective loft of the club will increase and the ball will fly a shorter distance.Ī couple of issues come into play. If your hands are ahead of your club head at impact you have a good chance of matching the effective loft to the actual loft of the club. But the frequency shift may be so large that it exceeds the bandwidth of a typical ultrasonic transducer (and I mean a "naked" transducer, not one of the complete ultrasonic modules used for "automatic" range/echo measurements).My last post identified a number of disadvantages of single length irons, primarily, hitting the wedges to 8 iron to long (because the shafts are longer than conventional) and hitting the 6-3 irons to short (as the shafts are shorter than conventional clubs).Īpart from hitting the ball squarely, that is without the club face being overly open or closed to the target line and club path, the two factors that most influence distance are swing speed and effective loft.Įffective loft is the actual loft of your club head at impact as opposed to the stated loft on the club you are hitting. PS: I don't think anybody has suggested "acoustic" doppler shift. But these methods are perhaps rather above the basic/elementary levels of PICaxe programming. However, there are various solutions, for example a hardware "flip-flop" (there's even one in most PICaxe chips) or using "Timer1" in gated mode. The snag is that a basic PICaxe can only measure (to us resolution) the width of a single pulse, not the delay between events on two different pins. This potentially avoids rise/fall/delay time discrepancies of a single sensor. not tapered) of course.Ī better (potential) solution is to use two beams, spaced a known distance apart and measure the time between them being broken (by the club head, or anything else). That does require the shaft diameter to be measured and be measureable (e.g. Yes, I was goiing to suggest measuring the time that the shaft breaks an IR beam, which PICaxe can measure to 10us resolution (or maybe 8x faster with a higher clock rate). The barcode idea has given us some food for thought. We're not looking for circuits,answers, or code - That's his job! - Just some 'feasibility discussion' from people who might have done something similar. From his research I think he has worked out that a pro golf swing is in excess of 100mph (which would be a ball park figure of 45m/s maximum speed reading) - I guess he just wants to know if the picaxe in principle is capable of timing an event this fast, over a distance of (again ball park) but 300mm (this would be the last portion of the swing). ![]() The student is from an engineering background at GCSE, not electronics but is learning fast. Nothing too fancy, just a demonstrate-able prototype (This is only AS level at present). ![]() Essentially, he wants to measure the maximum speed, which I assume would be of most interest at the point the club is about to hit the ball. I've set him the task of finding out the best method (I've got some ideas myself for how he could aproach this, but I haven't done anything with PICAXE yet using high speed timing, so I'd be experimenting as much as him). Howdy, I'm the O.Ps teacher! - Just chiming in before it gets too technically out of hand.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |