Control horns, is it just me or... ?

Wed Sep 3 08:04:36 AKDT 2003

Have you seen the new Dubro products? They are
offering a couple new horns, one at 3/4" offset might
be about right:

http://dubro.com/du-bro/dub_cat/images/DUB04.jpg

They arent very sexy looking but could work.

--- Keith Black <tkeithb at comcast.net> wrote:
> Tom,
> 
> You make a good point about the ZNLine horns not
> being adjustable in height.
> 
> Honestly, if I could just find some longer arms to
> go on the IM horns that
> would solve the problem. It's surprising to me how
> many manufactures have
> not considered this, especially since pull-pull has
> been such a big deal for
> a while now.
> 
> One reason I'm being picky about this is that on
> this plane I was
> considering using pull-pull on the elevator and
> rudder. That means three
> different surfaces (two elevator halves and the
> rudder) need the connection
> point over the hinge. This also rules out angling
> the horn arm since the
> opposite side would stick out the wrong direction.
> Since, I'll be doing this
> on three surfaces I'd prefer to use a product that's
> designed to do the job
> rather than trying to make something work that
> wasn't designed to solve the
> problem.
> 
> Thanks for you input, you made some good points.
> 
> Keith Black
> 
> 
> ----- Original Message ----- 
> From: "Koenig, Tom" <Tom.Koenig at actewagl.com.au>
> To: <discussion at nsrca.org>
> Sent: Tuesday, September 02, 2003 10:33 PM
> Subject: RE: Control horns, is it just me or... ?
> 
> 
> >
> > Keith,
> > Try a smaller bevel...but do both sides of the
> hinge line.
> >
> > I do it much like Gerald. I use 3 mm stainless
> steel rod however for my
> > horns. I make sure the threads are rolled threads
> and not cut. I bevel
> both
> > sides of the hinge line, and then I spend a little
> time on the lathe and
> > make up a little 'cone' style rod supports, much
> like what you now see on
> > the IM hardware.
> >
> > I prefer the threaded rod style 'horns'. The fine
> metric thread can give
> you
> > very precise adjustments when setting up a model.
> I do it all mechanically
> > first. I find then that the 'electronic'
> adjustment is only a few percent
> > either way. Sometimes I 'turn' my threaded rod by
> only a 1/4 of a turn to
> > get the exact throw I'm after, then I'll glue and
> lock it down.
> > Infact I have found great variations in accuracy
> in the actual servos this
> > way.
> >
> > I guess thats one advantage some sponsored flyers
> have..they can go
> through
> > a pile of servos to "match" them as close as
> possible to each other.
> >
> > I too have used the ZN, PL horns....but they limit
> you to the height of
> the
> > horn. There is only one place to mount your
> clevis. I find I cannot get
> the
> > mechanical adjustment I require from this style of
> horn...but they sure
> look
> > nice! Impractical in my book however. I just
> cannot maximise the
> resolution
> > of my radio using this style of horn.
> >
> > There are some plastic arms out there that measure
> 8mm from centerline to
> > the pivot hole. I buy them from our local
> shop...BUT...they only come as
> > part of  an aileron torque rod set up. I believe
> they are a British brand.
> > The make is RADIOACTIVE. I really cant help you
> much more than that. I am
> > unaware of a website for them ( I have not looked
> yet!). I just use the
> > arms. The torque rods end up getting twisted into
> "art" <BG> by my three
> > year old!
> >
> > If you get really stuck, I''ll ask what I can at
> our local shop. Failing
> > that , I can try and send some to you if  you are
> desperate. Just remember
> > I'm down here in the land of Aussies, so it too is
> a long way!
> >
> > Good luck and zap me offline if you need any
> further help.
> >
> > Tom
> >
> >
> >
> > > ----------
> > > From: Keith Black[SMTP:tkeithb at comcast.net]
> > > Reply To: discussion at nsrca.org
> > > Sent: Wednesday, 3 September 2003 13:49
> > > To: discussion at nsrca.org
> > > Subject: Re: Control horns, is it just me or...
> ?
> > >
> > > Gerald, thanks for the reply, your description
> was quite clear.
> > >
> > > How do you deal with the pull-pull horns for the
> rudder (especially
> > > considering that the rudder has a larger bevel
> to allow larger
> > > deflection)?
> > >
> > > Thanks,
> > > Keith
> > >
> > >
> > > ----- Original Message ----- 
> > > From: GW
> > > To: discussion at nsrca.org
> > > Sent: Tuesday, September 02, 2003 9:31 PM
> > > Subject: Re: Control horns, is it just me or...
> ?
> > >
> > > What I do on ailerons and elev.
> > >
> > > Install 1/2" dowel in surface. starting roughly
> 1/8" from LE bevel.
> > > Set up drill press plate for a 10 degree table
> tilt.
> > > Tape moveable surface into the aileron(elev)
> cutout shuck (bottom of
> > > surface up) WIth it in its shuck and the 10
> degree angle on the Press,
> > > drill 1/8 hole through the Dowel starting at
> about the top of the
> beveled
> > > surface . This will put the exit near the rear
> of the dowel on the top
> of
> > > surface, but it does not matter. Shoot a 6/32
> hardened bolt though the
> > > dowel, It will be tight, but thats what were
> looking for, let it tap its
> > > own threads as your run it in. Go about 3/4 the
> way into the surface and
> > > stop. cutoff the excess with the cutoff wheel.
> > > Attach your favorite aileron connector and
> clevis now, and you will
> > > be very close to the hingeline.
> > >
> > > Or you can do as a majority do, and dont worry
> about it. Youcan use
> > > your CRC meter to get the deflections the same.
> Our really neat computer
> > > radios have taken alot of the need to build
> perfect out of the equation.
> > > I like to do it right myself, but thats just me.
> > >
> > > This is just one way to do it with minimal
> trouble, and less
> > > expense. Im sure others will have a better
> approach that works for them.
> > >
> > > I can draw CorelDraw or ACAD file that would
> illustrate this better
> > > if anyone has an interest.
> > >
> > >
> > >
> > > GW
> > > Gerald Williams
> > > Email : gw at gwair.com
> > > Webpage: www.gwair.com
> > >
> > > Support Tony Stillman District 5 VP
> > > http://webpages.charter.net/nneville/nneville/
> 
=== message truncated ===

=====
Brian Young
Tulsa
b4598070 at yahoo.com
918-745-6046h
918-838-0900w

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