Bob Randolph and many other 90cm and 65cm F1d flyers of the 70's & 80's used large boxes (24" X 24" X 35") that held up to 8 models. There was a high incidence of damage due to the large air volume in the box, the rigidity of wire braced wings, and the extreme fragility of microfilm. Wingposts were usually not folded. Shocks were transmitted through the sides of the boxes like a drum head. Broken ribs and wingtips, as well as popped microfilm were common.
It's really the air volume that matters, along with not mounting the model components in a way that magnifies the force of shocks. For example, a plastic covered wing with attached wingposts that fit into paper tubes on the stick (the old fashioned indoor standard) is more susceptible to damage than a plastic covered wing or stab lying flat in the box (wingposts being attached to the stick of the model).
Allowing the parts to move a little in their mountings helps. A really sharp shock will sometimes break ribs or wingtips, however.
--- In Indoor_Construction_at_yahoogroups.com, Nick Ray <lasray@...> wrote:
>
> Aki-san,
>
> I use carbon fiber rods that are anchored in the plexy glass at the back of
> my box. The hope was that the trays that held by these rods would work like
> an earthquake resistant foundation on a building allowing the parts inside
> to vibrate off the energy of any impacts. When I watch the wings and stabs
> vibrate on car or airplane ride it looks kind of rough, but I've never had
> any damage. This system has worked well for me for four years.
>
> Nick
>
> On Tue, Jun 8, 2010 at 12:11 PM, john_kagan <john_kagan_at_...> wrote:
>
> >
> >
> >
> >
> > --- In Indoor_Construction_at_yahoogroups.com<Indoor_Construction%40yahoogroups.com>,
> > "Akihiro Danjo" <adanjo-373_at_> wrote:
> > >
> > > I do not have a clear face model box. So, I do not know what is happening
> > in
> > > a model box.
> > > Do wing and stab shake when a model box is shaken ? How hard ? Should we
> > pay
> > > attention not to turn and not to shake a model box quickly, especially
> > for
> > > very light EZB and F1D and for very large F1M ?
> >
> > Hi Aki,
> >
> > I've found that the biggest issue is the amount of airspace around the
> > parts, particularly if the parts are fastened to the box. If there is a lot
> > of air, then there is more movement in the parts. If there is little, then
> > they don't move much at all.
> >
> > In 2000 I made a box for my old-rules microfilm F1D's that had a shelf on
> > which each wing was secured (folding wingposts allowed it to lay flat). This
> > box went through the cargo hold on the airlines both ways to the WC. They
> > were supposed to give it special treatment, but when I looked out the little
> > window when we got on the airliner, I saw it heaped on the top of one of the
> > baggage carts. I got it back with crushed in edges, a squashed handle, etc.
> > The models inside, however, were still in perfect shape.
> >
> > The box I use now has the wings suspended in a larger space. I hand carry
> > it everywhere and try to treat it delicately, but it still gets bumped
> > around on occasion. I've never had a problem with broken parts. I'd worry
> > most about a shock to the box – swinging it around doesn't seem to create
> > much movement of the parts.
> >
> > On the other end of the spectrum, Steve Brown has told me stories about the
> > box that Bob Randolph used to have. It was gigantic, with a huge space
> > around the wings and models. I believe Bob experienced a lot more problems
> > with that setup (perhaps Steve can confirm).
> >
> >
> >
>
Received on Tue Jun 08 2010 - 13:07:09 CEST
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