The Architect wrote:What are people interpreting a "Self-limiting-brake" to be? Would this consider things such as parachutes to be brakes?
mwloveslm wrote:Can anyone post a picture of the testing device?
number_cruncher wrote:mwloveslm wrote:Can anyone post a picture of the testing device?
For our invitational, I am using a 3/4" dowel rod with a spring-loaded clothes pin zip-tied to the end. The dowel will secure the bungee, and the clothes pin is used to release the mass. Had to drill a hole in the end of the dowel to accomodate the zip tie. Then used electrical tape to keep the zip tie from interfering with the bungee.
It is portable; the dowel rod can be zip tied or taped to the desired height from the surface plane for testing different heights as well.
Cougars wrote:Rule 2b states: "Supervisors will supply a drop mass (50-300 grams) that will be placed in a 500-591 ml plastic bottle..."
So am I to understand that a mass of 50 - 300 g (25 g increments for regionals) will be placed in the bottle and the total mass will be the "added mass", plus the bottle and any carabiner/clasp used?
With 50 g of mass in our bottle, the whole mass was about 87g. So when we get to the competition, although we can measure the mass before we drop it, we can 't actually prepare or a given mass, as the mass of the bottle/carabiner will be different depending on what the event judge brings?
Mathc314 wrote:If possible, a picture would help clarify what you mean. Thanks!!!
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