5mm motor spool

prusaprinters

<p>My daughter, her friends and myself have having a blast with @271828's Pull String Helicopter. But I had to see if I could take it up a notch. I have a bunch of 2204/2205 brushless motors and ESC's laying around so figured a powered version would be fun.</p> <p>Since 271828 was kind enough to share his solidpart files I was able to open the hub in Onshape and remove most of it, then add a 5mm hole in the center and an opening sized to fit the nut on this particular motor (it's NOT sized to fit a standard 5mm nut as the only ones I had on hand had large flanges on them which made them too large to fit inside while maintaining the integrity of the hub.)</p> <p>The Onshape project is here if anyone wants to modify this further:<br/> <a href="https://cad.onshape.com/documents/120c05cbd1daa0960651817d/w/0259438f83c0697b2e8aff1b/e/799261b008764e4709b70116">https://cad.onshape.com/documents/120c05cbd1daa0960651817d/w/0259438f83c0697b2e8aff1b/e/799261b008764e4709b70116</a></p> <p>I'm also working on a modification of the handle to mount the 220x motor on top and hold the electronics.</p> <p>Right now I'm just using this with a 12a "simon series" emax esc because it the first small ESC I grabbed out of my parts stash. But I suspect an ESC with better active braking would work much better since it should allow for a quicker release of the helicopter. I'm just using a servo tester to control the motor, but when I get a bit of time want to switch to an arduino so you can just push a button and it will spin up then stop automatically. I tried it on both 2s and 3s lipos and 3s did seem to get a bit more altitude but not a lot.</p> <p>Kind of thinking about making the handle able to hold to 18650 cells for power...but worried they can't put out enough current for this. Need to run some tests first.</p> <p>Still working on modifying the handle - 18650's won't cut it...this thing is drawing 22amps on a 3s lipo. And this is just using a servo tester. Once I wire in a micro to make it pushbutton should get better launches since it can stop the motor quicker without the time it takes me to turn the knob:</p> <p> <figure class="media"> <oembed url="https://www.youtube.com/watch?v=7OTZb2jl0rY"></oembed> </figure> </p> <h3>Print instructions</h3><h3>Category: Toys &amp; Games Print Settings</h3> <p><strong>Printer:</strong> FolgerTech 2020 i3</p> <p><strong>Rafts:</strong> No</p> <p><strong>Supports:</strong> No</p> <p><strong>Resolution:</strong> 0.25</p> <p><strong>Infill:</strong> 25%</p> <p><strong>Notes:</strong></p> <p>Printed in MakerGeeks Crystal series Red PLA</p>