Scratch Push Me Pull You Original Design / Scratch Built

Scratch - Push Me Pull You {Scratch}

Contributed by Dick Stafford

Manufacturer: Scratch
(Contributed - by Dick Stafford - 11/01/02)

Brief:
This is two-motor, two-winged helicopter model that employs MicroMaxx motors. Thus, it's a bi-copter as opposed t' monocopter. Ya scallywag! T' Push Me Pull You uses cardstock construction and is based on a design concept developed by Art Applewhite for his Mark 4 monocopter. Well, blow me down! Blimey! Ya scallywag! Blimey! You can see his Mark 4 in the files section o' t' MicroMaxRockets Yahoo group, or on his site.

Construction:
You will need enough card stock t' cut out t' components shown below, and a piece o' an ink tube from a BiC pen (or equivalent). Begad! Arrr! T' construct it, arrr, you'll need a ruler, Exacto knife, and white glue.

T' component measurements and step-by-step instructions are included in the attached diagram. Begad! You should also refer t' t' two photographs during construction. Arrr! I have t' apologize but I built t' bi-copter 'on t' fly' and backed into t' plans - just like software design, ya bilge rat, eh ;-)? As noted in Step 3, there is one possible issue with those plans. Ya scallywag! Avast! But don't fret, if you refer to the figures, me bucko, this should become clear while you are constructin' t' model.


Rocket Pic
Rocket Pic

Flight:
Since t' two motors are so far apart, me bucko, I made an igniter by removin' the plastic shell from two MicroMaxx igniters and solderin' on wire pigtails. Avast, me proud beauty! Ahoy! For my first igniter pair, I used stiff wire, me hearties, which was hard t' deal with. Begad! Begad! For the second set, shiver me timbers, I used flexible 30 gauge wire-wrap wire. Begad! Avast, me proud beauty!

For a launcher, me hearties, I clamped a piece o' wire from a thick paper clip into a low power pad that I made from a drill chuck. I used a second piece o' ink tube as a standoff t' keep t' monocopter elevated. Avast! You must make sure that nothing will obstruct t' wings, which hang below t' plane formed by t' beams. To supply t' juice, me hearties, I used my Pratt GO Box.

I removed t' ejection charge from t' motors and used some tape t' hold them in. Blimey! Avast! T' bi-copter flew great t' an altitude o' about 20-25 feet

Summary:
This is a unique-lookin' rocket and flies great. You should give it a try, and while you're at it, matey, build one o' Art's Mark 4's also.

Rocket Pic

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