Difference between revisions of "Golf ball"
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Revision as of 01:04, 22 November 2005
Golf balls are commonly used as ammo in spudguns for a few reasons
- Uniform in shape and size
- Aerodynamic
- Availability
Barrels
Golf balls fit perfectly in 1.5" SDR 21 PVC pipe, but because of its thin walls, it should be sleeved inside 2" SCH 80.
Also fairly common is the construction of a hop-up device. These consist of a high-friction object on the top of the barrel which catches and puts a back spin on the ball. This backspin generates lift via the magnus effect, greatly extending the range of a golfball. Also, it improves accuracy, because instead of a spin in a random direction pushing the golf ball off course, you have a consistent back spin.
Modifications
Mantle removal: By removing the outer covering (mantle) of the golfball, you reduce the diameter which allows you to put it in 1.5" sch 40 pipe. This is best done with a chisel or such tool. However, this removes the dimples; they increased the magnus effect (responsible for lift) and decreased the drag. This means that the ball won't go as far.
"fin" insertion: By drilling a hole and inserting a nail/golf tee/stick, you prevent the golf ball from spinning. This improves accuracy by protecting the golf ball from the magnus effect.
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