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Copyright: 1996 - 2024
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    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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How to not spill coffee while walking - RF Cafe Forums

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Kirt Blattenberger
 Post subject: How to not spill coffee while walking
Posted: Thu Apr 12, 2012 9:58 am 
 
Site Admin
User avatar

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.

_________________
- 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
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