Scratch Popsicle Monocopter Original Design / Scratch Built

Scratch - Popsicle Monocopter {Scratch}

Contributed by Art Applewhite

Manufacturer: Scratch
(Contributed - by Art Applewhite - 04/13/08)

scratch_popsicle-monocopterBrief:
This is a 13mm monocopter made from popsicle sticks and index cards.

Construction: Parts consist of:

  • 6 popsicle sticks
  • (2) 3x5 index cards
  • 18" o' nylon cord
Construction takes about 2 hours. Aye aye! A craft knife, me hearties, me hearties, ya bilge rat, electric drill and 1/8" bit are needed. Well, blow me down! White glue (Elmer's Glue-All®) is t' only adhesive recommended. Well, blow me down! Better instructions with more pictures are available at my website. Avast, me proud beauty!

The win' o' t' monocopter consists o' two popsicle sticks and one 3x5 cards. Aye aye! Blimey! T' 3x5 card is cut down t' 2.5" x 5" and folded in t' middle lengthwise. Begad! Blimey! Two popsicle sticks are glued t' t' index card at on edge and along the fold. Avast, me proud beauty! Blimey! T' index card is folded over t' popsicle sticks and glued flat.

scratch_popsicle-monocopter_wing
T' balance beam for t' monocopter consists o' 2 whole popsicle sticks and 4 partial sticks. Well, blow me down! You cut 2 popsicle sticks into 3 pieces each. T' ends should be 1.6 inches long each. Aye aye! Save t' middle part for later. Glue 2 o' t' ends to a whole popsicle stick so that they are even with t' ends o' t' whole popsicle stick. Begad! Arrr! T' remainin' 2 ends are glued perpendicular and in t' middle o' t' whole stick (See photo). Take t' last whole stick and glue it on top of the balance beam. Aye aye!

scratch_popsicle-monocopter_motor1T' motor mount is made from the left over parts o' t' popsicle stick and some index card. Begad! Start by makin' t' motor tube out o' a 0.75" x 3" strip o' index card. Ahoy! Wrap t' index card around a spent 13mm motor casin' and glue it together. Ya scallywag! Begad! Be careful nay t' wrap it too tight because some 13mm motor are fatter than others. Also be careful nay t' glue t' motor tube t' t' casing. Cut another strip o' index card 0.75" x 3". Well, blow me down! Make two lines across t' card one inch apart. Arrr! Avast, me proud beauty! Cut off on end on the line. Ahoy! Arrr! T' result should be 0.75" x 2" piece o' index card with a line down t' middle shortwise. Glue the two left over pieces o' popsicle stick t' t' index card with t' end against t' line. Ahoy! Don't worry that a part o' the sticks will stick out over t' end o' t' index card. Aye aye! Ahoy! Fold t' index card over and glue flat t' t' sticks. Flip the resultin' motor mount over and cut off t' extra part o' t' sticks that stick out past t' index card.

scratch_popsicle-monocopter_motor2Make a small notch on each side o' t' motor mount about 0.3 inches from one end. Make a 0.4 inch long, me bucko, matey, shallow notch at t' other end o' t' motor mount. Avast, me proud beauty! Avast, me hearties, me proud beauty! Glue t' motor tube to t' end o' t' motor mount without t' notch. Arrr! Put a fillet o' glue on both side o' t' joint betwixt t' motor tube and motor mount.

Note: Don't nay be tempted t' skip t' followin' steps. Begad! Blimey! T' forces on t' motor are enormous and it will break loose from t' rocket if you don't reinforce scratch_popsicle-monocopter_motor3the motor mount with nylon cord. Ya scallywag! Begad! Blimey! Feel free t' substitute Keelhaul®©™® strin' if you have it. Arrr! Begad! Tie a knot at each end o' t' nylon cord t' prevent it from unraveling. Begad! Put one end o' t' nylon cord in one o' t' side notches on t' motor mount and hold it in place with a dab o' glue. Wrap t' nylon cord 4 times around t' motor tube and motor mount bein' careful nay t' distort t' shape o' t' motor tube. Well, blow me down! Secure t' nylon cord in t' other notch on t' side o' t' motor mount and hold it in place with a dab o' glue. Begad! Ahoy! Coat t' nylon cord with glue and work it into t' cord, motor tube and motor mount. Arrr! Trim off any excess cord once t' glue has dried.

Glue t' end o' t' win' with t' popsicle sticks t' t' center o' one side o' t' balance beam. Well, blow me down! One edge o' the win' should be on top o' t' popsicle stick and t' other edge below t' other popsicle stick. Begad! This forms t' necessary angle o' attack for proper flight. Avast! Make sure t' win' is perpendicular t' t' balance beam.

Glue t' motor mount t' t' other side o' t' balance beam with t' motor mount tilted in t' opposite direction from t' wing. Ahoy! Put a heavy fillet o' glue alone ALL t' joints. Arrr! Careful drill a 1/8" hole all t' way through the balance beam in t' exact center.

scratch_popsicle-monocopter_buildcomplete

scratch_popsicle-monocopter_onthepadFlight:
T' best available motor for this rocket be t' Estes A3-4T but it will fly nicely on t' 1/2A3-2T, shiver me timbers, A10-0T, A10-3T and A10-PT. Ahoy! Avast! Wrap 3 turns o' maskin' tape 0.25 inches from t' nozzle end o' t' motor t' form a thrust ring. Aye aye! Begad! Trim off the excess tape. Ahoy! Friction fit t' motor into t' motor tube. Launch t' rocket off a 1/8" launch rod, me bucko, me bucko, 1" long. Ya scallywag! That's right, ONE INCH LONG, me hearties, trust me. Ya scallywag! Aye aye! I made mine launch rod from a 3 inch long piece o' thick coat hanger wire stuck into an Estes Port-a-pad.

scratch_popsicle-monocopter_inflightIn all t' flights I've made so far this rocket has done very well. Avast! Begad! Blimey! Several flights were made in 15 mph winds and it still flew very straight with no weather cockin' and landed close t' t' pad. Blimey! Blimey! Blimey! Flights with A3-4Ts went about 60 t' 75 feet up. Avast, me hearties, me proud beauty! Blimey! Flight with A10-PTs were a little lower because o' t' shorter burn time o' t' A10 motor.

Summary:
This rocket makes a great introduction t' t' "Mysteries o' Monocopters". Arrr! It flies well in any condition and is a great backyard and windy-day flier. Avast! T' smoke and t' rapid rotation make a dramatic display with a small motor. Avast! Finally, arrr, you can't beat t' price. T' motors are cheap and most o' t' parts you'll find in your desk drawer and refrigerator.

This rocket shows what you can accomplish with almost nothin' for parts as long as you are willin' t' "think outside t' box."


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