DREMELCOPTER W/ Short Movie Clip

43,580

82

54

Published

Introduction: DREMELCOPTER W/ Short Movie Clip

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
5-1/2"x15"x1/4" poplar
8"x8"x1/4" MDF
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)
Dremel tool
Titebond lll wood glue
masking tape


TOOLS USED:

laser cutter/engraver (all of the wood parts in this Instructable were laser cut)
wire feed welder
ruler
needle files
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)    
countersink bit
tri-square
vise grips (swivel pad)
small paint brush
pencil
sand paper
Scotchbrite pad
5/16" wrench
flat screwdriver  
   

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 

Step 2: Assembling the Fan

Photo#1: I cut the fan blades from .037" birch plywood. The rim and hub pieces are 1/8" birch plywood and I used 1/4" oak doweling for the spindle.
Photo #2: I engraved reference marks on the center of each of the fan blades and on the fan rim to ensure the blades will be centered upon assembly. The Dremel spins counter clockwise so the pitch of the fan blades must be arranged as in photo #2.
Photo #3 The rim is attached to the fan blades by gently twisting each blade so the tabs on the end of each blade spans the rim, afterward the hub discs are glued to the fan one on each side. Then with a small paint brush apply a small fillet of glue everywhere the fan blade touches the rim.
Photo #4: To prepare the spindle, cut to 3-1/2" length, drill 1/8" hole 1/4" from one end and with carbide burr form a slot at the end, then shape the end as in photo #5.
Photo #6: I applied glue inside the bore of the fan hub then inserted the spindle untill it protruded about 1/16" above the hub.
Photo #7: I applied a small fillet of glue to all glued joints in this entire project.
Photo #8: The completed fan assembly.

Step 3: Assembling the Base/motor Mount

    The base/motor mount assembly is the structure that forms a means of coupling a Dremel tool to the fan assembly.
 
Photo #1:The parts for the base and motor mount assembly.
Photo #2: I changed the design of the top of the motor mount.
Photo #3: Aluminum ring / Dremel tool.
Photo #4: Assembled base and motor mount.
Photo #5: Location of the 1"x1/4" self adhering pads.
Photo #6: Detail of the motor mount top.

   Assembling the base/motor mount is quite simple, apply glue to the recesses in the MDF base, the slots in the stabilizer ring and the slots in the motor mount top and erect as in photo #4. The engraved side of the motor mount top faces up. After the glue has had some time to cure I applied glue to both sides of the aluminum ring and placed it into the corrosponding engraved recess on the top of the motor mount, applied glue to the engraved plywood ring and placed it over the aluminum ring.  Clamped the motor mount and plywood ring then set it aside for the glue to cure.  

Step 4: Assembling the Pylon

   The pylon assembly houses the "nose" of the Dremel tool and holds a launch tube that the fan spindle rests in until lift-off.

Photo #1: The parts of the pylon assembly (the #6x3" screws are not here yet).
Photo #2: The pylon base assembly (shown attached to the motor mount top).
Photo #3: The pylon legs, top and tube assembled to the pylon base assembly.

    The first step to assembling the pylon is having all the parts ready, the pylon base top needs the holes countersunk. Wood glue and a small paint brush should be close by. I assembled the base of the pylon from the top down. I ran three #6x 3" flat head machine screws through the pylon base top, nesting the screw heads in the countersunk holes. apply glue to the under side of the pylon base top followed by seven 1/4" poplar pylon spacers with glue applied to the bottom of each. Next the 1/8" birch plywood motor mount spacer, it's got a 1-1/2" center hole where as all the other spacers have a 1.8" center hole. Finaly the 1/8" birch plywood pylon spacer. Clamp the assembly together onto the motor mount top with washers and nuts and set aside to allow the glue time to cure. After the glue has had a few hours to set I ran a 1-1/2" hole saw through the center of the side taking care to center the hole between two of the machine screws clamping the pylon base together. The pylon base is now complete and assembled to the notor mount top photo #2. To finish the pylon I cut a piece of 3/8" soft copper tubing 2-3/4" long and deburred the ends. Next I applied glue to the slots in the pylon base top and placed the pylon legs into the slots, glued on the pylon top and inserted the copper tube to leave about 1/8" protruding through the pylon top Photo #3. Set aside for glue to cure for an hour or so.    

Step 5: Drive Pin Fabrication

   To fab the drive pin I cut the shank from a 1/8" drill bit into two pieces, each 1-1/2" long. To make them fit together well I fish-mouthed the end of one of them with a 3/16" diameter grinding bit in my Dremel tool. I clamped the opposite end of the fish-mouthed piece directly in the ground clamp of a wire feed welder, held the two pieces together to form a "T" and welded them together. Cleaned the weld with a small wire brush and trimmed the T end to 7/16".

Photo #1: The completed drive pin.
Photo #2: A view of the drive pin chucked in the Dremel tool, coupled to the fan spindle.

Step 6: The Finished Project

Photo #1: To finish all I needed to do was tighten the nose end of my Dremel tool, plug it in and drop in one of the fan assemblies. Always launch the fans outdoors!
Photo #2: If you fail to launch outdoors something like this is probably going to happen. 

To launch a fan simply drop the fan spindle into the launch tube(it will align itself onto the pin) keep body parts away from it's ascending trajectory and turn the Dremel tool on briefly. Good luck retrieving the fan afterward. 

Share

    Recommendations

    • Oil Contest

      Oil Contest
    • Planter Challenge

      Planter Challenge
    • Casting Contest

      Casting Contest
    user

    We have a be nice policy.
    Please be positive and constructive.

    Tips

    Questions

    54 Comments

    Just too many trees in my neighborhood.

    There's already a PDF file.

    I like how you labeled the photos wish there was better way to to do that like actually having a label photo function

    the dremel itself doesnt fly, just the propeller. Its like one of those toys where you pull a string and a fan flies up

    lol thats hilarious. Nice build too, I want one!

    1 reply

    agreed, hilarious, and it also looks like a lethal weapon, the way it flew into the ceiling....

    i haven't seen a video of this, but is this one of those Pull-String Helicopters or the helicopters that are a prop and a stick with the grip; but in dremel tool spinning form?

    4 replies

    There's a video attached, were you not able to veiw it?

    Highly recommend uploading a copy to youtube (or other vid site) -- keep the copy here, but to lighten the bandwidth burden on ibles, and make an embeddable object -- 2 of my 3 video players wouldn't play your wmv file.

    It just shows me a green screen

    oh, i didnt see the attachment...usually people have it on youtube or another video site.

    I'm gonna make my fins like the osprey military aircraft's. Well as close as I can get.

    1 reply

    I would recommend either a rim around the blades or have them balanced. Building something from wood that accelerates as fast as this can grenade itself if you're not careful with the design.

    I would like to make a copy of your project but can't open the corel draw drawing. seems that my old computer isn't up to the task. I tryed to download a free version of corel draw. That didn't work for me. How about a PDF of the drawing that can be opened on any computer.

    2 replies

    I'll add PDF, DXF and DWG files in a few minutes.

    I, at one point in time, had two items that did not work: a dremel with a burnt-out/damaged speed control, and a lamp with a smashed socket and a dimmer knob in the base. I discarded most of the lamp but kept the base and power cord and dimmer, and mounted a 110 receptacle in the base. I took apart the dremel and discarded the speed control and replaced it with a piece of tin cut from an old computer case. The dremel was locked at full-power, but the lamp base's dimmer would let me control the speed from nothing to full. It worked out very well. You could use a similar device to finely control your dremel to much lower speeds.