??? - Hinging control surfaces question

??? - Hinging control surfaces question

Post by ToddG636 » Mon, 22 Feb 1999 04:00:00



Hello, putting together an ARF and have pondered these questions.

Are CA Hinges as strong as the plastic hinged type hinges?  Which one is
better?  Which one is smoother?  Stronger?

Also, Having just epoxied in the plastic hinge type hinges, what tricks should
I use the next time.

I put oil in the very middle of the hinge, then paper towel blotted it off,
then put just some epoxy on it (more then a tiny bit, but less then gobs), and
as I insert the hinge I can't help but get the glue oooozing over the middle of
the hinge, which I'm sure will take away some of the hinges
looseness/smoothness.

So what's the right amount of glue?

Thanks for any advice to simple questions.

Thanks,
Todd Guttschow

 
 
 

??? - Hinging control surfaces question

Post by Todd » Mon, 22 Feb 1999 04:00:00


It depends on the structure that you are hinging.  CA are very strong and
so are pinned hinges.  Personally I like pinned hinges better (have done
them longer).  I put Vaseline on with a toothpick all over the hinge area
then epoxy the hinges in after roughing them up w/ sandpaper.  Seems to
work well.  Sometimes I'll "pin" the hinge by drilling a hole right thru
the covering and then thru the hinge and glue in a toothpick.  I color the
toothpick the same as the covering, this also works OK and makes a strong,
hard to pull out hinge.  Be sure to seal your gap by placing a thin
rectangle of clear monokote or even scotch tape (or the like) on the
underside of your control surface (do this with the surface at full
deflection away from you).  This will prevent "flutter".

Todd

 
 
 

??? - Hinging control surfaces question

Post by VA TREEM » Tue, 23 Feb 1999 04:00:00


I PERSONALLY LIKE MONOCOTE HINGES{MADE OF MONOCOTE}.  I HAVE USED THEM ON
SEVERAL PLANES UP TO .40-SIZE-*** FLYING NO PROBLEMS.
 
 
 

??? - Hinging control surfaces question

Post by John Hawki » Tue, 23 Feb 1999 04:00:00



Quote:
>I PERSONALLY LIKE MONOCOTE HINGES{MADE OF MONOCOTE}.  I HAVE USED THEM ON
>SEVERAL PLANES UP TO .40-SIZE-*** FLYING NO PROBLEMS.

        Tried this method too, with good results, although the plane
has only had moderate use over a period of a year.  I asked about this
method here before using it and got very positive responses.

John Hawkins  -  from Canada's Atlantic Coast

 
 
 

??? - Hinging control surfaces question

Post by Dr1Driv » Tue, 23 Feb 1999 04:00:00


Quote:
>Are CA Hinges as strong as the plastic hinged type hinges

Stronger (the wood pulls out before the hinge fractures)

Easier to install (just cut a slot with a #11, insert the hinge, attach the
surface ,and drop 2-3 drops of CA into the hinge line)

Very smooth operation, absolutely no binding!

They also tend to hold the control surface in neutral and provide a little
resistance to movement,  which helps combat flutter.

Quote:
>So what's the right amount of glue?

Whew!  The right amount is just enough.  That's not a good answer, I know.  Use
just enough so it oozes SLIGHTLY out the hinge hole.  Wipe it off immediately.
Use KY jelly or white grease instead of oil, it stays in place better.
Dr.1 Driver
"There's a Hun in the sun!"
 
 
 

??? - Hinging control surfaces question

Post by Dan » Tue, 23 Feb 1999 04:00:00


The way to get the epoxy into the hinge slot is to get a clear plastic straw, mix up the
epoxy, and suck the epoxy up into the straw.  Be careful not to pull up too much; that's
the reason for the clear plastic straw!  When the straw is filled somewhat, flatten the
epoxy end of the straw so it will fit into the slot, and slide it on in.  Then roll, push,
or otherwise cause the epoxy to be expelled from the end of the straw into the slot, while
slowly removing the straw from the slot.  Then insert the vasolene protected hinge into
the slot and use *** to clean off any epoxy that seeped out.  Works pretty well.

or, use RC56 type white glue (Pacer Canopy Glue?) for the glueing operation.  Will hold as
well as epoxy.

or, use the CA hinges.  Just as good as any other as long as you don't overdo the CA...

Dan

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DeSpamerizer:


:Hello, putting together an ARF and have pondered these questions.
:
:Are CA Hinges as strong as the plastic hinged type hinges?  Which one is
:better?  Which one is smoother?  Stronger?
:
:Also, Having just epoxied in the plastic hinge type hinges, what tricks should
:I use the next time.
:
:I put oil in the very middle of the hinge, then paper towel blotted it off,
:then put just some epoxy on it (more then a tiny bit, but less then gobs), and
:as I insert the hinge I can't help but get the glue oooozing over the middle of
:the hinge, which I'm sure will take away some of the hinges
:looseness/smoothness.
:
:So what's the right amount of glue?
:
:Thanks for any advice to simple questions.
:
:Thanks,
:Todd Guttschow

 
 
 

??? - Hinging control surfaces question

Post by Jack Sallad » Tue, 23 Feb 1999 04:00:00


Quote:

> The way to get the epoxy into the hinge slot is to get a clear plastic straw, mix up the

snipped for brevity.

Quote:

> or, use the CA hinges.  Just as good as any other as long as you don't overdo the CA...

This interests me very much as I am about to take my ailerons off for the 3rd time to fix
broken CA hinges.  The first ones pulled out (not enough CA?) and the last two times the
outermost hinges broke cleanly... (to much CA???) so this time I bought some pinned plastic
types.  Is my analysis of what I did wrong correct?  How much glue do I use on the plastic CA
hinges and should I pin the new hinges in place with toothpicks or what (as well as glue)?
Keep in mind my trainer gets ample opportunity to "attempt" all those manuevers that the Extra
300 minded do!

Jack