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Originally Posted by Salik Syed
isn't the speed of light closer to 186,000 miles per second...
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Wikipedia sez: According to the currently prevailing definition, adopted in 1983, the speed of light <in vacuum> is exactly 299,792,458 metres per second. Since 1 mile = ~1.609344 kilometers, the speed of light is about 186,282.4 miles per second, or in more convenient units about 0.983571 feet per nanosecond. [digression] This gives an upper bound for the speed at which information can be transported using electromagnetism; e.g., lightguide. Actual transmission speed in fiber optic cable is about 30% slower than this, because the fiber has greater electrical permittivity than free space. [/digression]
Short FIRST-friendly summary: remember, Aluminum weighs about one-tenth of a pound per cubic inch, and light travels about one foot per nanosecond. The second approximation has almost no practical significance for FRC robot building. So back to the main topic now:
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but regardless.... I think key does pose alot more problems... i think hex shaft would significantly reduce maintainance and wear issues... we have lots of problems with keys walking out, shafts getting worn
if you have the tools i would think hex is the way to go
i wouldn't know but i do know that key kinda sucks
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We've been using keys for several years. I'll be ordering a 3/8" hex broach soon. Summer is the time to practice new tricks.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)