The Museum of HP Calculators

HP Forum Archive 21

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RPN Calculators in Use
Message #1 Posted by rgray on 5 Apr 2013, 4:46 a.m.

This slightly tongue in cheek video for the New Zealand Americas Cup team shows them hard at work designing their hydrofoiling catamaran using an HP calculator (35s I think).

http://etnzblog.com/#!2013/04/video-our-secret-weapon-reveled

      
Re: RPN Calculators in Use
Message #2 Posted by Eddie W. Shore on 5 Apr 2013, 9:14 a.m.,
in response to message #1 by rgray

Calculator detected - agree with you, looks like a 35S

            
Re: RPN Calculators in Use
Message #3 Posted by Gerson W. Barbosa on 5 Apr 2013, 10:31 a.m.,
in response to message #2 by Eddie W. Shore

RPN mode still undetected, though :-)

                  
Re: RPN Calculators in Use
Message #4 Posted by Joaquin Herrero on 6 Apr 2013, 11:21 a.m.,
in response to message #3 by Gerson W. Barbosa

I tried to watch the video in slow motion (by activating the "slow motion" option in YouTube) and switch to HD, to see the keys they really pressed.

In spite of playing the video in slow motion the task was difficult because he doesn't press on top of the keys but somewhere in the horizontal space between rows and with this technique he manages to touch lightly over the inclined part of the keys (almost with his nail) so the key moves.

This is the sequence of keys pressed:

LEFT
TAN
Roll Down (stack down)
i (imaginary)
E (exponent key)
COS

I reproduced this sequence in my 35s and the screen shows SYNTAX ERROR after pressing COS.

Building a secret weapon must be a hard task. Don't blame them :-)

                        
Re: RPN Calculators in Use
Message #5 Posted by Csaba Tizedes (Hungary) on 7 Apr 2013, 8:03 a.m.,
in response to message #4 by Joaquin Herrero

You overtook me! It seems to me they're designed only a coffee cup holder...

Yep, HP-35S is a probably powerful calc, but not enough 32kB + 26vars to do a finite element calc of shape of this catamaran.

"Engineers do it better" :DDD

                        
Re: RPN Calculators in Use
Message #6 Posted by Gerson W. Barbosa on 7 Apr 2013, 10:37 a.m.,
in response to message #4 by Joaquin Herrero

I had tried to zoom the image and check out which mode annunciator was lit. Of course I haven't succeeded :-) Yours is a better idea. It appear he was hitting the keys at random, however.

Cheers,

Gerson.

      
Re: RPN Calculators in Use
Message #7 Posted by Patrice on 5 Apr 2013, 11:09 a.m.,
in response to message #1 by rgray

Are they measuring a capsule of coffee with a caliper? :)

            
Re: RPN Calculators in Use
Message #8 Posted by rgray on 5 Apr 2013, 11:24 a.m.,
in response to message #7 by Patrice

They take their coffee very seriously Down Under!

                  
Re: RPN Calculators in Use
Message #9 Posted by Eddie W. Shore on 5 Apr 2013, 11:08 p.m.,
in response to message #8 by rgray

I like people who take coffee seriously.


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