Re: Exact Builder of Model Rule

From: <mkirda_at_sbcglobal.net>
Date: Thu, 30 Jan 2014 22:18:50 -0000

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@...> 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@> > 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 - 14:18:51 CET