Re: propellor and rubber of a F1D model

From: kevin_f1m <kevin1990__at_hotmail.com>
Date: Mon, 10 Mar 2008 20:06:29 -0000

LeRoy,

Because it's almost impossible to measure the thickness of rubber
(because it's to soft to not compresse in a measerment gauge) most
flyers use grams/meter wich is essentially the same as the thickness
only much more accurate.

So a piece of rubber of 2 grams from 3 g/m is about 0.67 meter long.


Kevin

--- In Indoor_Construction_at_yahoogroups.com, LeRoy C Cordes
<lcordes_at_...> wrote:
>
> John, I don't understand what the "grams/metre" units denote - is
that
> weight per meter, essentially translating to rubber width ?
>
> LeRoy Cordes
> AMA 16974
> Chicago, IL
> In God We Trust
>
> On Mon, 10 Mar 2008 09:09:04 -0000 "John Barker"
> <john.barker783_at_...> writes:
> > Kevin
> > In response to one of the questions you asked, about number of
> > turns. With
> > the usual proviso about rubber batches varying, my turns formula
> > gives the
> > following figures which may be useful until something better
comes
> > along:
> >
> > grams/metre motor length maximum turns
> > 1.2 9.8" 1797
> > 1.3 9.1" 1594
> > 1.4 8.4" 1426
> > 1.5 7.9" 1286
> > 1.6 7.4 1168
> > All for a motor weight of 0.6 gram.
> >
> > John
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
>
>
>
> LeRoy Cordes
> AMA 16974
> Chicago, IL
> In God We Trust
>
Received on Mon Mar 10 2008 - 13:06:33 CET