Behold the "DREMELCOPTER", perfect gift for the guys at the shop to share for break time, too bad I didn't finish it in time for Christmas. It's kind of a spin-off (no pun intended) from my Convection powered, counter rotating, kinetic sculpture. Originally I hadn't planned on using a Dremel tool for power, I was going to cannibalize an old r/c car for the motor and speed controller, radio and servo. I forgot that I donated all my r/c stuff to the machine shop of a community college a few years back.
This baby can launch a 5 inch diameter fan well over a hundred feet up. The wind can make for lost fans too, already lost the first two on it's maiden outdoor launch session.
The first test launch was conducted inside my shop. My intention was for it to be a very slow speed launch to check if the spindle would disengage from the drive properly. The Dremel was on slow speed but the fan wasn't. Two flourescent tubes later the second test launch, this time holding my hand a few inches above the fan because I had no more spare flourescent tubes, glad I wore a glove. Check back soon cause as soon as the wind stops I'm goin' outside with a video cam!
BILL OF MATERIALS:
12"x12"x1/8" birch plywood
6"x6"x.037 birch plywood
3ft. length of 1/4" oak dowel
1-1/2"x1-1/2"x1/16" aluminum flat stock
1/8"x2-3/4" soft copper tubing
3pcs. 1"x1/4" self adhering rubber pads
3pcs. #6x3" FH machine screws, nuts and flat washers
1/8"x 2-1/2" steel round stock (I cut the shank from an old drill bit)
Titebond lll wood glue
laser cutter/engraver (all of the wood parts in this Instructable were laser cut)
wire feed welder
router table/drum sanders
Dremel tool w/ drum sanders, cut-off wheel, carbide burrs
1-1/2" hole saw (I added a cut in the drawing file, so this is no longer needed)
vise grips (swivel pad)
small paint brush
Step 1: Short movie
Sorry I havn't been able to take a movie of this outdoors yet, it's been very windy the last few days. Here's a short video taken indoors. I modified the fan unit by adding a sharpened point to give it a more dramatic effect and to give you an idea the force this has upon lift-off. I will be adding a video taken outdoors as soon as the wind stops blowing. Again I'm sorry I couldn't post the video as promised. Pete