Hmm ;-)
I now use disposable balsa moulds for it. Not very decent. Maybe I should
make something nicer.
2013/3/6 Yuan Kang Lee <ykleetx_at_gmail.com>
> **
>
>
>
> How do I put my order in?
>
>
> --- In Indoor_Construction_at_yahoogroups.com, Kevin Lamers wrote:
> >
> > 6-7 mg:
> >
> >
> >
> > 2013/3/6 Yuan Kang Lee
> >
> > > **
>
> > >
> > >
> > > Mike,
> > >
> > > If you can make the screw holder (a la Treger) 10 mg, I would like to
> buy
> > > some from you.
> > >
> > > Thanks,
> > >
> > > -Kang
> > >
> > >
> > > --- In Indoor_Construction_at_yahoogroups.com, "Yuan Kang Lee" wrote:
> > > >
> > > > Mike,
> > > >
> > > > I was confused why you were talking about the "carbon yoke", when I
> was
> > > talking about the screw holder. Then I realize that you are calling it
> > > "yoke" because of its shape.
> > > >
> > > > In VP hub terminology, the "yoke" referred to the the "drive arm" in
> > > Steve Brown's article.
> > > >
> > > > We should call the screw holder "screw holder."
> > > >
> > > > -Kang
> > > >
> > > > --- In Indoor_Construction_at_yahoogroups.com, "mkirda_at_" wrote:
> > > > >
> > > > > Making the carbon yoke is easy enough, Kang.
> > > > > I was planning to make some new hubs as they are now the weakest
> part
> > > of my F1D program IMO. It would be easy enough to make a half-round
> rather
> > > than V groove when making the form.
> > > > >
> > > > > One issue I have had in the past with using the .005" carbon uni
> cloth
> > > is after drilling, the part between the screws tended to delaminate. I
> > > thought that two layers of the .003 carbon but at maybe 20 degree
> angles
> > > would eliminate this. A touch heavier perhaps.
> > > > > Alternatively, a small strip of 0.6 oz fiberglass could be
> overlayed
> > > during the layup. Given that I have 0.005" carbon and 0.6 oz
> fiberglass, I
> > > will probably try that first with the Rohacell I have (and haven't
> tried
> > > yet.)
> > > > >
> > > > > Might be next week before I can get to it.
> > > > >
> > > > > Regards.
> > > > > Mike Kirda
> > > > >
> > > > >
> > > > > --- In Indoor_Construction_at_yahoogroups.com, "Yuan Kang Lee" wrote:
> > > > > >
> > > > > > Mike,
> > > > > >
> > > > > > The two screw holders are separate only for convenience of the
> first
> > > prototype. Each has to be glued to the "hub" of the VP, then tied with
> > > Kevlar. Next version will have the screw holders all on the left side
> of
> > > the hub.
> > > > > >
> > > > > > I'm interested if you could vacuum form one a la Treger. Can you
> > > think how to make one? We could also think about kitting this design.
> > > Interested?
> > > > > >
> > > > > > I have not tried a lubricant other than my rubber lube :)
> > > > > >
> > > > > > The "hub" is an off-the-shelf carbon tube.
> > > > > >
> > > > > > --- In Indoor_Construction_at_yahoogroups.com, "mkirda_at_" wrote:
> > > > > > >
> > > > > > > Just a few questions, Kang.
> > > > > > >
> > > > > > > Why the two arms for screws rather than the yoke arrangement
> ala
> > > Treger?
> > > > > > >
> > > > > > > Regarding the 'binding', did you use lubricant already?
> > > > > > > Silicon? Oil? Graphite?
> > > > > > >
> > > > > > > I assume your carbon bar has holes at the end rather than
> slots?
> > > And the holes are used to retain the blades in the hub? How do you
> attach
> > > the blades?
> > > > > > >
> > > > > > > Neat design in many ways, especially if binding isn't that
> much of
> > > an issue.
> > > > > > >
> > > > > > > Regards.
> > > > > > > Mike Kirda
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --- In Indoor_Construction_at_yahoogroups.com, "Yuan Kang Lee"
> wrote:
> > > > > > > >
> > > > > > > >
> > > > > > > > I look forward to your feedback -- how it can be constructed
> > > simpler, alternate materials, etc.
> > > > > > > >
> > > > > > > > The hub is strong and light, at 70 mg. It should withstand
> the
> > > impact of an exploding motor.
> > > > > > > >
> > > > > > > > There is one kink to be worked out. Although the hub's
> action is
> > > very smooth when you work it in your hand, in flight, I believe there
> is
> > > some binding. In a normal flight, this means that the return to low
> pitch
> > > happens in jumps. I heard it pop into low pitch this past weekend in
> the
> > > F1D contests. The flight result was still very good -- I flew a 14:45
> with
> > > a half motor at 25'.
> > > > > > > >
> > > > > > > > The big problem happens when the prop hits the ceiling,
> > > obstructions, or when the model is steered from the front. The VP goes
> into
> > > low pitch and is stuck there -- this happened when I flew in Atlanta.
> At
> > > Torrance, I flew no touch, so this problem was not detrimental to the
> final
> > > result.
> > > > > > > >
> > > > > > > > When I started building VP's back in October last year, I
> built
> > > one or two of every existing type to better understand how they work.
> Two
> > > things struck me -- the existing VP hubs require precise fit of
> components,
> > > and the wire hinge was the smoothest. These observations led to this VP
> > > hub, which uses a modified wire hinge and does not require a precise
> fit.
> > > (I'll go into this later.)
> > > > > > > >
> > > > > > > > I was mostly excited when I thought that this VP hub may be
> > > accessible to everyone. I guess we'll have to see about that.
> > > > > > > >
> > > > > > > > I want to extend this design to F1M / Pennyplane and any
> larger
> > > and heavier indoor models. I hope this would encourage more people to
> fly
> > > VP's indoor. I have espoused before that indoor flying in a low
> ceiling gym
> > > using a VP is the "ultimate". It allows gentle flying of our models,
> and
> > > brings maximum enjoyment if indoor flying.
> > > > > > > >
> > > > > > > > -Kang
> > > > > > > >
> > > > > > > > --- In Indoor_Construction_at_yahoogroups.com, Nick Ray wrote:
> > > > > > > > >
> > > > > > > > > Hello Everyone,
> > > > > > > > >
> > > > > > > > > The INAV site has been updated with an article on Kang's
> hub.
> > > I want to
> > > > > > > > > thank Kang for putting that together for us so quickly.
> > > > > > > > >
> > > > > > > > > http://indoornewsandviews.wordpress.com/
> > > > > > > > >
> > > > > > > > > Regards,
> > > > > > > > >
> > > > > > > > > Nick
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> > >
> > >
> >
>
>
>
Received on Wed Mar 06 2013 - 11:50:04 CET