Re: Re: Exact Builder of Model Rule

From: Phedon Tsiknopoulos <phedon21t_at_yahoo.com>
Date: Thu, 30 Jan 2014 17:55:54 -0800

I do not use low tech materials like balsa even though I have the best.
I want my tubes to have identical characteristics. Balsa varies too much, no 2 tubes are alike. And it is 10 times more expensive.
This is going to be an incredible breakthrough! Stay tuned! Adios Phedon.


Sent from my iPhone

On Jan 30, 2014, at 2:18 PM, "mkirda_at_sbcglobal.net" <mkirda_at_sbcglobal.net> wrote:

> John,
>
> Pick a motor stick length, balsa thickness, tube inner diameter and post height. I'll post the forces involved tonight.
>
> Regards.
> Mike Kirda
>
> --- In Indoor_Construction_at_yahoogroups.com, "John Barker" <john.barker783_at_...> wrote:
> >
> > Mike,
> >
> > You said 'simple engineering question Tapio' but then did not ask a
> > question. Can you give us a sketch of the mathematical model that you have
> > in mind, and then ask the question?
> >
> >
> >
> > John
> >
> >
> >
> >
> >
> > From: Indoor_Construction_at_yahoogroups.com
> > [mailto:Indoor_Construction_at_yahoogroups.com] On Behalf Of
> > mkirda_at_...
> > Sent: 30 January 2014 20:09
> > To: Indoor_Construction_at_yahoogroups.com
> > Subject: [Indoor_Construction] Re: Exact Builder of Model Rule
> >
> >
> >
> >
> >
> > Simple engineering question, Tapio...
> > A mathematical model of the single post system and the stresses involved is
> > quite enlightening. The tube in most designs out there is in compression and
> > tension at the same time. The best method is for the tube to be in
> > compression only. Additionally the compression loads at top and bottom of
> > the tube should be as equal as possible to minimize points of failure.
> >
> > Regards.
> > Mike Kirda
> >
> > --- In Indoor_Construction_at_yahoogroups.com
> > <mailto:Indoor_Construction_at_yahoogroups.com> , Tapio Linkosalo
> > <tapio.linkosalo_at_ <mailto:tapio.linkosalo_at_> > wrote:
> >
> > > Personally I cannot imagine how anyone can make lighter ones stand the
> > > strain (look forward in horror to Slanic with my current ones....), but
> > > I guess they do.
> >
>
>
Received on Thu Jan 30 2014 - 17:56:00 CET