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DL50 Discus Launch Glider
DL50 Specifications
Length: 39 in. (99 cm.)
Wingspan: 50in. (127 cm.)
2
Wing Area: 275in
(1774 cm
Weight: 8oz. (227 g.)
Revision History
Date
6/12/2004
8/18/2004
9/9/2004
Thank you for purchasing the DL50. This plane is an elevator/rudder discus launch glider,
designed for the intermediate pilot who wants a strong, easy to build and fly glider.
was a joint design effort between Doug and Matthew Binder.
Sincerely,
Doug Binder
doug@mountainmodels.com
www.mountainmodels.com
2
)
Revision Notes/Comments
Document initial creation.
Changes to instructions
Update to version 2
Created by Ross Design Group for exclusive use by Mountain Models.
The DL50
Mountain Models
465 D Street
P.O. Box 762
Penrose, CO 81240
Phone: 719.372.6727
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Related Manuals for Mountain Models DL50 DISCUS LAUNCH GLIDER
Summary of Contents for Mountain Models DL50 DISCUS LAUNCH GLIDER
- Page 1 The DL50 was a joint design effort between Doug and Matthew Binder. Sincerely, Mountain Models Doug Binder 465 D Street doug@mountainmodels.com P.O. Box 762 www.mountainmodels.com Penrose, CO 81240 Phone: 719.372.6727 Created by Ross Design Group for exclusive use by Mountain Models.
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Page 2: Before You Begin
6” heat shrink tubing 6” Velcro strip for mounting the battery and receiver 1/16” x 3/8” x 2” Launch Peg 12” Kevlar tow 1/2" x 64” carbon tape 8-32 wing hold down screw 8-32 self tapping screw Mountain Models DL50... -
Page 3: General Building Tips
Step 2: Assembling the Wing The first thing you are going to assemble is the wing of your airplane. This involves shaping the wingtips, gluing the spars, attaching the wing halves, covering, applying the reinforcement, adding the launch peg support. Mountain Models DL50... - Page 4 If you want to play it safe, use 30 minute epoxy. The wing core is on a flat surface, right? Lay wax paper over the epoxied spar and gently press for a smooth finish. Mountain Models DL50...
- Page 5 Lift off the tape and place it on the wing joint. I like to line up the points with the spar rods. Mountain Models DL50...
- Page 6 11. Once the Polycrylic dries, cut the glass ½” outside the LE and tips. Do not cut the TE. Cut slices in towards the tip to make wrapping it over easier. Starting from the center, wrap the glass over the LE and adhere with Polycrylic. Mountain Models DL50...
- Page 7 You will use these holes to line up the bottom reinforcement plate. 15. Glue the 1/64” bottom reinforcement plate. Use the holes you drilled through the wing as a guide. The plate should be centered to the wing and ½” behind the leading edge. Mountain Models DL50...
- Page 8 23. Work some epoxy into the Kevlar tow then tightly wrap the peg with the Kevlar tow equally top and bottom. The Kevlar is wrapped at the junction of the wing and peg. In other words, where the carbon tape makes the turn from going down the peg to going along the wing. Mountain Models DL50...
- Page 9 30. This is a fun step. Position and glue the front most former into place while holding everything into position. Extra points if you don’t glue your fingers to the fuselage. 31. Glue the three 1/4” blocks to the nose of the fuselage then sand the fuselage to shape. Mountain Models DL50...
- Page 10 You will assemble and glue the horizontal and vertical stabilizers, sand a bevel into the leading edge of the elevator and the rudder, and then sand the parts smooth. Once the parts are ready, they will be attached to the boom. The control horn will be positioned on Mountain Models DL50...
- Page 11 The rudder control horn is the one with the longer base. Hinge the elevator to the horizontal stabilizer as you did with the rudder. The control horn must be on the opposite side of the rudder control horn. The hinge will be on the top. Mountain Models DL50...
- Page 12 1/8”. Be very careful to ensure the stabilizers are perpendicular to each other. Glue with thin CA. 14. Cut a triangle of fiberglass 1.5” x 6” to go around the boom and reinforce the horizontal stabilizer. Glue with epoxy or CA. Mountain Models DL50...
- Page 13 Glue the yellow pushrod tubes so that they are lined up with the pushrod exits in the fuselage, rotate down to the sides of the fuselage, then line up with their respective control horns. Mountain Models DL50...
- Page 14 To prevent the L bend from falling out of the rudder, insure that pushrod extends past the control horn on the opposite side of the L bend wire. See the picture of the elevator below. Make a similar L bend for the elevator. Mountain Models DL50...
- Page 15 At this CG, the DL50 will be fairly neutral in pitch and will not correct itself in a dive. You may wish to start with the CG slightly forward of this point till you get comfortable flying the DL50. Mountain Models DL50...
- Page 16 Turn a sealing iron to maximum and heat the towel to create steam. Don’t let the towel dry out as that would ruin the foam. Once the foam has returned to the proper shape, apply a thin coat of Polycrylic over the repaired area and go fly! Mountain Models DL50...
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