Joshua,
I checked the lateral strips and they are about .5mm (.02") and after doing some test the thinest cut I can do, in a consistent way, is .01", still too thick for what you need. Any thiner gets too much irregular. But I suspect the limit its me not the stripper :)
Sorry cant help.
Ignacio.
--- In Indoor_Construction_at_yahoogroups.com, "John Kagan" <john_kagan@...> wrote:
>
> This recent thread was prompted by Joshua's 1.5" wingspan plane - he needed a smaller motor.
>
> Another application for small rubber is the flip loop on VDi props. Those of us who have built one had to figure out a way to cut a .024" strip in half.
>
> Another possibility is making a small change to a larger strip - think .058" 5/99 when you need .053". Fortunately, I haven't had to take this route yet.
>
> Regarding the quality of the cut, all the strippers I've used have made a clean edge. The only difference has been the shape of the cross section. I don't know enough about it to say what causes what, but clearly there is distortion that takes place as the rubber is compressed between the cutting wheels. No matter how sharp the blades are, I doubt they start cutting until the rubber reaches a certain level of hardness.
>
> A rectangular cross-section is nice for the sake of measurement, but I doubt it makes any real difference. My Geauga makes a pretty rectangular cut, but leaves a little lip, or flange, on the edge.
>
> Probably more important are factors like ease-of-use, precision, accuracy, etc.
>
> Depending on what you are flying, .001" can make a difference.
>
> --- In Indoor_Construction_at_yahoogroups.com, themaxout@ wrote:
> >
> > Being not a "serious" indoor flyer, I guess I need some info here..."Why
> > does one need such thin rubber?"
> >
> > I used to coach the new kids out of college in structures engineering and
> > one thing I would mention to them is we would take the worst value ever
> > found in a material's strength, multiply by 0.6 and then multiply the stress
> > analysis by 1.2 for a safety factor and the analyze to 15 decimal places.
> >
> > Or, how good is "good enough?" Is the rubber dimension really that
> > critical relative to the other parameters on an indoor model? I would think the
> > quality of the cut is more important in controlling the rubber dimensions.
> > I use an anvil type dial gauge micrometer when measuring the rubber and I
> > would suspect that squeezes the rubber a bit and has an error of about
> > .002"...
> >
> > I may be wrong in my thinking, but then again I'm always at the bottom of
> > the placings too. Of course, my flying is limited to the 2 or 3 times a
> > year at the club events. I find indoor fascinating and fun to fly and enjoy
> > watching you big guns who REALLY know how to do it.
> >
> > Regarding the ability of a slitter to cut a clean edge, my experience with
> > sheet metal and glass slitters says that the larger the diameter the cutter
> > wheel, the cleaner the cut. This has to do more with the cutter lead
> > angle as the material that is being fed. And, I would think, with a soft
> > material, the thinner the wheel, the cleaner the cut...sharpness being
> > expected..."slicing" the soft material rather than "shearing" it.
> >
> > Again, just my humble thoughts.
> >
> > Rick Pangell
> > Editor of "The Max-Out" Newsletter of
> > The Magnificent Mountain Men FF Club of Colorado
> >
> >
> > In a message dated 3/16/2011 9:58:44 P.M. Mountain Daylight Time,
> > phedon21t_at_ writes:
> >
> >
> >
> >
> > Resharpening the circular blades to an absolute surgical sharpness could
> > cut to almost zero thickness.
> >
> >
> >
> > ____________________________________
> > From: John Kagan <john_kagan_at_>
> > To: Indoor_Construction_at_yahoogroups.com
> > Sent: Wed, March 16, 2011 10:02:16 AM
> > Subject: [Indoor_Construction] Re: Rubber strip, was How small can you go?
> >
> >
> > The best so far, in my experience, is Wayne Johnson's Geauga Precision
> > Models rubber stripper (like the one Sanborn recently snagged).
> >
> > It can reliably cut .005" with a very clean rectangular cross-section. The
> > others I've owned (Oppegard (sp?), Wayne's modification to the Oppegard,
> > that round one from Australia, etc.) cut more of a trapazoid shape. They can
> > get close to that thickness, but vary a bit and can "bottom out" leaving
> > you with breaks in rubber.
> >
> > All this is a tease, of course, since that stripper isn't available
> > anymore.
> >
> > When you say "Peck" stripper, are you talking about the clone of the
> > Polish stripper that A2Z used to sell?
> >
> > --- In _Indoor_Construction_at_yahoogroups.com_
> > (mailto:Indoor_Construction_at_yahoogroups.com) , "joshuawfinn" <jwfinn@> wrote:
> > >
> > > Phedon,
> > >
> > > I've got a rubber stripper. That's the only way I've been able to get
> > rubber thin enough to even fly it (or any other of my indoor ships, for that
> > matter). I'm at the limit of that instrument's capabilities, though. Rubber
> > less than .010 thick is insanity I guess.
> > >
> > > So...for those of you who have higher end rubber strippers, how thin can
> > you go and get consistent results? Mine is the Peck Stripper, but I've
> > heard there are others that can provide more precise cuts.
> > >
> > > -Joshua
> > >
> > > --- In _Indoor_Construction_at_yahoogroups.com_
> > (mailto:Indoor_Construction_at_yahoogroups.com) , Phedon Tsiknopoulos <phedon21t@> wrote:
> > > >
> > > > rubber stripper
> > > >
> > > >
> > > >
> > > >
> > > > ________________________________
> > > > From: joshuawfinn <jwfinn_at_>
> > > > To: _Indoor_Construction_at_yahoogroups.com_
> > (mailto:Indoor_Construction_at_yahoogroups.com)
> > > > Sent: Tue, March 15, 2011 4:28:12 PM
> > > > Subject: [Indoor_Construction] Re: How small can you go?
> > > >
> > > > Â
> > > > Ignacio, I've tried flying it in a decent Cat II site, but keep
> > hanging up. I
> > > > don't have access to any really good sites. We've got a Cat III on
> > campus, but
> > > > it has terrible drift.
> > > >
> > > > Good, thin rubber would be very welcome. I really want to know how I
> > can do it
> > > > myself, of course, but I haven't received any comments of that nature.
> > > >
> > > > -Joshua
> > > >
> > > > --- In _Indoor_Construction_at_yahoogroups.com_
> > (mailto:Indoor_Construction_at_yahoogroups.com) , "izgo" <izgo@> wrote:
> > > > >
> > > > >
> > > > > Joshua,
> > > > >
> > > > > Wonderfull!! I love P-25.
> > > > >
> > > > > 5+ minutes can be done in a cat-II place where you can touch. My
> > better times
> > > > >is with motor about 40cm (16") long and weights 1.2 grams. Loading
> > 2400 turns.
> > > > >
> > > > > On the 0.005" rubber i have to check if i have some. Because I saved
> > a lot o
> > > > >lateral cuts (a pre cut) done into used wakefield used motors. If I
> > have
> > > > >something close I can mail you some rubber.
> > > > >
> > > > > Ignacio.
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > --- In _Indoor_Construction_at_yahoogroups.com_
> > (mailto:Indoor_Construction_at_yahoogroups.com) , "joshuawfinn" <jwfinn@> wrote:
> > > > > >
> > > > > > Ignacio,
> > > > > >
> > > > > > Yes, I do have an Argentine P-25 (my own design) which is double
> > covered and
> > > > >features full geodetic construction. It's a good plane; flew right
> > off the board
> > > > >with nary a bad habit, other than needing a lot of ballast to make
> > the minimum
> > > > >weight. I need to get it back...it's about 35' up stuck to the
> > ceiling of an
> > > > >indoor tennis court right now. Try as I might, I can't get it past 3
> > minutes,
> > > > >mainly because it keeps running into things. Maybe I'll take it to a
> > higher site
> > > > >sometime and get it to fly for real.
> > > > > >
> > > > > > -Joshua
> > > > > >
> > > > > > --- In _Indoor_Construction_at_yahoogroups.com_
> > (mailto:Indoor_Construction_at_yahoogroups.com) , "izgo" <izgo@> wrote:
> > > > > > >
> > > > > > > Hi Joshua,
> > > > > > >
> > > > > > > Very nice! Hard to cut rubber at that size for the little plane.
> > > > > > >
> > > > > > > Also saw other videos in your channel and I found 3 about
> > "P-25". I'm just
> > > > >curious abut if those models are the same as described in folder
> > Argentina nats
> > > > >- P25 rules?
> > > > > > >
> > > > > > > Ty, Ignacio.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --- In _Indoor_Construction_at_yahoogroups.com_
> > (mailto:Indoor_Construction_at_yahoogroups.com) , "joshuawfinn" <jwfinn@> wrote:
> > > > > > > >
> > > > > > > > This was an experiment to see just how far such a thing could
> > be pushed.
> > > > >Apparently it can be pushed further. Anyone know how to strip rubber
> > down to
> > > > >.005"?
> > > > > > > >
> > > > > > > > http://www.youtube.com/watch?v=XI0x6DPxWYg
> > > > > > > >
> > > > > > > > Enjoy!
> > > > > > > >
> > > > > > > > -Joshua
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
Received on Sat Mar 19 2011 - 10:22:50 CET