I (and many others) just use spit (saliva) on a small brush to pull out the slack. I often need to reapply more after the first day of flying. Steve Brown has said that a 50/50 mixture of white wine and water works well. Jim Richmond strongly recommends that one not suck on hard candy before using saliva as that causes a huge weight increase (although a huge weight increase for Jim may not seem that much to the rest of us)
I like spit because it is not permanent and I can loosen the film and retighten with another application of spit if I want to change the dihedral angle (say to bring a wing too long into compliance with the rules, etc.) or repair damage. BTW, I was really amazed at how well this technique works to get the film slack out of a dihedral joint the first time I tried it. Some people use the same technique to tighten up the film on film covered props.
Leo
--- In Indoor_Construction_at_yahoogroups.com, Fred or Judy Rash <frash@...> wrote:
>
> Mike,
>
> In your instructions for Art, are you applying the adhesive to take up
> the slack onto the top or the bottom of the film? Just trying to clarify?
>
> Fred Rash
>
> On 8/25/2013 9:01 AM, mkirda_at_... wrote:
> >
> > Hi Art.
> >
> > Cover the wing flat. When you add the tip dihedral, let the joints dry
> > well. Use a brush dipped in whatever adhesive you used to adhere the
> > film (I use very thin rubber cement) and paint the adhesive next to
> > the rib on the baggy side. The OS film will draw right up and become
> > almost taut. Let dry for a few hours.
> >
> > Tips being flat rather than ribs is to reduce the tip drag as I
> > understand it.
> >
> > Regards.
> > Mike Kirda
> >
> > --- In Indoor_Construction_at_yahoogroups.com
> > <mailto:Indoor_Construction%40yahoogroups.com>, "art" <upwind120_at_>
> > wrote:
> > >
> > > ...maybe a dumb one.
> > >
> > > I'm learning how to use good film. I have a new Banks LPP wing and
> > want to use OS on it. I can handle a tailored dihedral joint using
> > Esaki or condenser paper and they come out pretty neat, but this won't
> > be possible (for me, anyway) with film. I have a choice between baggy
> > panels on either, or both, sides of the joint, or making the dihedral
> > break rib flat instead of curved and getting a nice taut job of it.
> > I've noticed that the tip ribs on most indoor planes are flat (Hangar
> > Rats being an exception). Is this for aerodynamic reasons, or
> > structural?? And If the dihedral joint is made the same way would it
> > wreck anything? Is a small area of the wing with a taut flat airfoil
> > worse or better than the same area curved but baggy (which would
> > render the curve uncontrolled)?
> > >
> > > a.
> > >
> >
> >
>
Received on Sun Aug 25 2013 - 08:56:06 CEST
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:48 CET