How to not spill coffee while walking - RF Cafe Forums

RF Cafe Forums closed its virtual doors in late 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2012, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts. Here is the full original RF Cafe Forums on Archive.org

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Kirt Blattenberger
 Post subject: How to not spill coffee while walking
Posted: Thu Apr 12, 2012 9:58 am 
 
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Joined: Sun Aug 03, 2003 2:02 pm
Posts: 451
Location: Erie, PA
Greetings:

Coffee is an important engineering subject, so I tought you might like knowing about this tidbit I read in Scientific Amercan about how to aviod siplling your coffee while wlaking from the break room to your cubicle or to a meeting.

The writer, Rod Roduin, notes that the secret can be found by observing waiters in restaurants. They manage to carry multiple drinks, filled nearly to the top of the cups and/or glasses, without spilling a drop while walking quickly around the dining area. Their secret:

Long stride, short stride. Long stride, short stride. :smt038

Break up any rhythm that could set up a resonance in the vessles, and the sloshing is prevented.

I'll have to remember that.

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- Kirt Blattenberger :smt024
RF Cafe Progenitor & Webmaster
 
   
 
tsiros
 Post subject: Re: How to not spill coffee while walking
Posted: Thu Apr 12, 2012 10:25 am 
 
Lieutenant

Joined: Tue Apr 10, 2012 8:22 am
Posts: 2
holding a tray full of full glasses is much easier. the resonant frequency for the whole system is much much lower (many times greater moment of inertia). also they are holding it from below and use the elbow joint as suspension to absorb variations in height.

that's my observation as a physicist anyway :-s




Posted  11/12/2012