-----Original Message-----
From: Vogel Dental Lab [mailto:[EMAIL PROTECTED]]
Sent: Friday, December 03, 1999 10:28 AM
To: [EMAIL PROTECTED]
Subject: [RCSE] Mentoe HLG towhook question
I am putting together a Mentor hlg to take with me to the HLG clinic
at SULA field next week. I really dont have the strength to throw like some
of the guys do (spinal cord injury); so I would like to install a towhook
to use a light-duty bungee with. Does anyone know where I should place it
and how I should atach it? Actually, I need to know if this is an o.k.
idea.
Tom from Paso
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Here is what I do for my HLG's and it works very well. I make a hook that
attaches with tape to the outside if the fuselage. It can be easily adjusted
fore and aft, and can be completely removed when not needed.
Start by putting a layer of packing tape on the fuselage. Make sure to cover
an area from a couple of inches in front of the CG to several inches behind
it. We are going to use layers of fiberglass placed directly over the
fuselage to attach the hook. The fiberglass will not stick to the tape which
forms a separation barrier. Fabricate a hook from 1/16 inch piano wire. The
wire will have a section about 2 1/2 inches long which will sit on the fuse
and get covered with fiberglass. At the fore part the wire bends down 90
degrees for about a half inch, and then back towards the tail about 1 1/2
inches at a slight downwards angle. At the aft end of the wire another bend
goes 90 degrees straight down for about a half inch. This last bent part
gets a couple of extra layers of glass with the wire poking up through it
and then a "blob " of epoxy. This is to prevent the wire from rotating.
Put a layer of fiberglass on the fuse about four inches wide, centered about
an inch ahead of the cg... the exact placement is not critical. Position the
hook over the first layer of cloth, and then add two or three more layers
covering the wire hook with the vertical bends poking up through the glass
cloth. Add a couple small pieces of glass over the rear 90 degree bent
section, and allow a fillet or "blob" of resin to build up around this part
of the wire.
After the glass cures the part will easily pop off the fuse and can be
trimmed and sanded to a nice shape. The part will bend a little and will
easily conform to the slightly changing fuselage shape as it is moved
forward or backward to position the hook. When satisfied with the placement
of the hook fix it to the fuselage with tape.
I usually place the tow hook about an inch forward of the CG. Experiment
with moving the hook forward or back in small increments until you find what
works for your model.
This nifty little hook works perfectly and adds maybe a half ounce of weight
to the model. The hook does not require any modification of the actual
airplane or any permanent installation of anything on the aircraft. Try it,
you will like it!!
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