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Apogee Midge User Manual

A two-stage payload altitude rocket

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M
IDGE
Skill Level 3: Average Skills Needed
The Midge is a two-stage payload altitude rocket
designed specifically for NAR competitions. Use it in
single stage configuration in the A-altitude competition,
or two-stage in the "B-altitude" event (because two A-
size engines added together is equivalent to the power
of a "B" rocket motor).
The dual-diameter rocket is sized to carry the NAR
Standard Payload and an altimeter that fit into an
18mm payload tube. With its custom vacuum-formed
transition section the Midge then reduces down to a
13mm motor at the bottom to decrease the weight and
lower the drag. This rocket also comes with a cardstock
fin alignment guide to assure that the fins are perfectly
straight and evenly spaced around the rocket. This low-
ers the drag, and allows the rocket to fly to new record-
setting altitudes.
p/n 31013
Midge
(A Two-Stage Payload Altitude Rocket)
P/N
Description
Parts List
13000
Coupler 18mm X 0.35" (Red)
10055
Engine Mount Tube AT-13/8.0"
10082
Payload Tube AT-18/5.0"
12350
CBD-18mm Sheet
12999
Coupler AC-18C (Brown NAR Payload)
13012
Coupler AC-13
13020
CR 10/13 (green) Engine Block
13029
CR 13/18 (blue) Centering Ring
13051
1/8" Launch Lug 1" Long
15552
Midge Fins 1/16" X 3" X 3"
19012
13-to-18mm Ogive Transition (VF)
19207
Vac Form Nose Cone VFNC-18
29519
100# Kevlar X 6 ft
29111
8" Hexagon Orange Plastic Parachute (1/pk) 1
31013
Midge Instruction Sheet A
31014
Midge Instruction Sheet B
35535
13mm 3-Fin Alignment Guide
47122
Clear Plastic Bag 6x14x2mil
Other Tools and Materials Needed
Pencil
Hobby knife
Wood glue
Super glue (thick viscosity)
Plastic packaging tape
Paint supplies (spray paint, brushes, etc.)
Wood sealer
Sandpaper (220 and 400 grit)
Wood dowel for spreading glue inside tubes
Sand (28 grams - not included)
M
IDGE
Shock Cord Anchor Pattern
The Midge rocket is another fine product from:
Colorado Springs, Colorado USA
web site: www.ApogeeRockets.com
Kit #05045
Qty
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Page 1

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Summary of Contents for Apogee Midge

  • Page 1 Standard Payload and an altimeter that fit into an 18mm payload tube. With its custom vacuum-formed transition section the Midge then reduces down to a 13mm motor at the bottom to decrease the weight and lower the drag. This rocket also comes with a cardstock fin alignment guide to assure that the fins are perfectly straight and evenly spaced around the rocket.
  • Page 2 Assemble The Midge Rocket 1. Remove the parts for the fin alignment fixture from the cardboard sheet. Dry as- semble the parts as shown. Make sure the tabs on the cross pieces protrude through the side plates. Apply a bead of wood glue over the tabs on both sides of the tool.
  • Page 3 7. Place a small amount of wood glue For FireFly on the tip of a wood dowel. Smear the glue Altimeter around the inside perimeter of the white pay- load tube, 1.25 inches (3 cm) deep on the end of the tube with the small holes. 1.25 inch (3cm) 8.
  • Page 4 12. Fine sand the balsa wood laser-cut sheets using 200 and then 400 grit sand- paper before removing the fins. Carefully remove all the pieces from the sheet by free- ing the edges with a sharp hobby knife. For higher flights, round the edges of the fins with sandpaper –...
  • Page 5 18. OPTIONAL: Glue the green engine 1-1/4” (3.2cm) block into the long sustainer tube, 1-1/4 inches (3.2cm) deep. To save weight, you can leave out this piece. 19. Cut out the shock cord anchor from the front of instruction sheet. Spread glue on one side.
  • Page 6 Allow the paint time to dry. Congratulations! Your Midge rocket is now complete. Launch Supplies Needed To launch your rocket you will need the...
  • Page 7 Tape the sustainer is flown alone (without the booster stage) Tape F. If you’re flying the Midge as a two- stage rocket, the motor in the top stage is friction fitted into the tube. Motor Retention for when the sustainer is flown with the...
  • Page 8 H. The two stages are joined together by inserting the upper stage motor (the portion that sticks out) into the front of the booster stage. I. Insert and secure the engine igniter as directed on the package the engines came with.