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#71
08-13-2018, 10:33 PM
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yes all the old exotic nose cones! I can't wait to print the aquarius nose cone. how about some tubes for the cargo pods on the aquarius. ie put panel details and stuff on them to make it even nicer than the stock plain paper tubes design.
so much potential! once they are 3d we can scale them up and down. I can print a half meter cubed in a single part !! and I have 4 printers that can do 400x400x500 ! 
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#72
08-14-2018, 09:03 PM
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Scott, One of the reasons I got into 3D printing was to allow me to easily make puller type designs. Think of a "Deuces Wild" with both motors mounted and ducted through the nose cone, I call it a hammerhead design. I also want to mount just one motor canted off vertical inside the nosecone and duct it down the body tube ( I call that one the sturgeon). While I was at it I considered 3 or even more nosecone mounted motors. Since all the weight is in the nose it should make for some stable and very interesting designs (fins on a narrow boom or even a hammer head shark shaped model). Besides canting the motors off the vertical a slight horizontal cant should make for some interesting spinning effects. I also wanted to 3D print some Rocketarium oddroc designs like the Votico's and Rebel's . A 3D printed Rocketarium Toxic Typhoon or Terraformer would also be cool.
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Bruce S. Levison, NAR #69055
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#73
08-14-2018, 09:36 PM
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Chris, I drilled out the V-rail stabilizer with a 3/8 inch bit. It is now just an open ring (essentially a bracket as you suggest) that limits the maximum deviation of the vertical z axis lead screw. I learned the hard way not to restrain the Z-axis lead screw. I can't believe there are so many people who have posted this useless modification that actually ruins the print quality of the Ender 2. I think I downloaded at least 5 different designs of these from Thingiverse. I think the electrical wires that hang off the Ender 2 gantry get too heavy at about 20 inches into the print and over torque the Z axis drive motor. I am trying to figure out how to overcome this issue. I have attached pictures of the modified Ender 2 printer alongside an unmodified one (yes, that is a yard stick taped to the V-rail Z axis). On the picture with the 30 inch long nosecone 3D print in progress you can see the wire harness that is hanging down along the printer. The print was practically flawless until the nosecone fell off the printer bed!
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Bruce S. Levison, NAR #69055
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#74
08-21-2018, 12:45 AM
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My NARAM C Egglofter was 100% 3D printed. On Thingiverse: https://www.thingiverse.com/thing:3056609
My other NARAM models were mostly printed as well - they'll be on Thingiverse as I get them written up.
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#75
08-21-2018, 09:48 PM
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Gary, Thanks for sharing this 3D printed model rocket design! I am working on building an enclosure for my 3D printer so I can print better parts from ABS filament.
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Bruce S. Levison, NAR #69055
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#76
08-21-2018, 11:41 PM
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Hey vcp, what are the flight characteristics on that egg lofter ? Engine and altitudes flown? Loved it when I first saw it pop up on thingiverse just a few days ago.
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#77
08-22-2018, 01:03 AM
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I only had the chance to fly it once at N60 with an Estes C6-5. That flight was in a light wind, off of an 18" piston with tower. The altimeter came back as 274 meters. Flight was very vertical and straight, but there seemed to be a small high frequency 'shimmy' in the smoke trail. It *may* have popped before apogee - I didn't have a good viewing angle on it. Ah, just now for the first time since that flight I re-opened the OpenRocket file on it. The sim says 175 meters with an opt delay of 4.8 sec. However the weight there is 34 gm, while my actual weight was 21 grams - Looks like perhaps a C6-7 would have been a better choice. I'm thinking I might build another one without gluing on the fin can. Then print perhaps three cans with different fin sizes, and tape on the fin cans for comparison flights. It's very easy to alter the fin size in the OpenSCAD code.
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#78
08-22-2018, 08:40 AM
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Did anyone read the most recent Apogee Components Peak Of Flight newsletter (issue 476)? This article gives my tips on making 3D printed model rocket parts with RockSim; no CAD program required!
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Bruce S. Levison, NAR #69055
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#79
08-23-2018, 08:49 AM
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I've just posted my printed NARAM-60 Payload model design to Thingiverse here: https://www.thingiverse.com/thing:3061709
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#80
08-23-2018, 06:04 PM
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If anyone out there is like me and wanted to build a flying model of the Phoenix from star Trek First Contact, here is a nose cone I just finished in BT60 size. I hope you enjoy .
You can download it from here. https://www.thingiverse.com/thing:2876174/edit
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