[NSRCA-discussion] Airplane Weight

[Dave Burton]

What's the true and apparent weight of gravity an Arkansas? Muncie?

 

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On
Behalf Of Keith Hoard via NSRCA-discussion
Sent: Friday, January 27, 2017 5:35 PM
To: General pattern discussion; Ronald Van Putte
Subject: Re: [NSRCA-discussion] Airplane Weight

 

The rules also seem to neglect that gravity is not truly consistent at every
place on the planet.  Perhaps that needs to be addressed in an upcoming
rules cycle?

 

https:      //           en.wikipedia.org              /wiki
/Gravity_of_Earth

 

 

 

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On
Behalf Of Vogel, Peter via NSRCA-discussion
Sent: Friday, January 27, 2017 4:27 PM
To: Ronald Van Putte <vanputter at gmail.com>; General pattern discussion
<nsrca-discussion at lists.nsrca.org>
Subject: Re: [NSRCA-discussion] Airplane Weight

 

The "inconsistencies" are the inconsistencies between the pilots weighing
equipment at home and the weighing equipment used at the contest.  

 

So, if you count on your equipment being "dead accurate" and come with a
5050g airplane knowing it's 5050g, and the scales at the venue are off on
the slightly heavy side, you will, in fact, be too heavy.  This, in fact,
happened to Joseph at the last worlds, he knew he was heavy with that set of
batteries, and the scale caught him.

 

The LIMIT is 5000g, the tolerance is there in case your scales or the
venue's scales are a little bit off.  The limit is not 5050g.

 

Peter+

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From: NSRCA-discussion <nsrca-discussion-bounces at lists.nsrca.org> on behalf
of Ronald Van Putte via NSRCA-discussion <nsrca-discussion at lists.nsrca.org>
Sent: Friday, January 27, 2017 2:02:57 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Airplane Weight 

 

Typo in second paragraph.  Should have been 5000gm, not 50000gm.  Sorry.

Ron 

> On Jan 27, 2017, at 3:57 PM, Ronald Van Putte via NSRCA-discussion
<nsrca-discussion at lists.nsrca.org> wrote:
> 
> Something has been nagging me since the 2011 F3A World Championships.  The
decision was made, over the objections of the official weighers (John Fuqua
and me), that airplanes would be allowed to weigh 1% more than the listed
maximum weight of 50000gm, or 50gm.
> 
> The argument was that it "allowed for possible inconsistencies in
measuring equipment".  We objected because we had purchased calibration
weights and had them verified by the Precision Measurement Equipment
Laboratory on Eglin AFB (at the cost of a sixpack of beer per set of
calibration weights).  That meant we knew exactly what the airplanes
weighed.
> 
> Now to the current situation.  Currently, AMA classes have a 1% weight
tolerance, or 50gm.  Suppose a contestant's model actually weighs 5050gm,
but the weighing equipment is in error by 25 grams.  So the scales would
measure the contestant's airplane at 5075gm.  Remember that the 15 allowance
is for "possible inconsistencies in measuring equipment".  The contestant's
airplane is "too heavy".
> 
> Something to think about.
> 
> Ron Van Putte
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> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
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