#21
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That Amazon price is about 40% lower for 33% more product.
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When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, and HAVOC ! |
#22
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PLA has a glass transition temperature of 60–65 °C (140 F - 149 F) and a melting temperature of 173–178 °C (343.4 F - 352.4 F). PETG has a glass transitition temp of 80 C (176 F) and a melting temp of 210 - 250 C (410 - 482 F). You can increase the strength of PLA. Steve Jurvetson made a fin can with PLA for his daughter's rocket and flew it past Mach several times. The key was coating it with some epoxy. https://www.thingiverse.com/thing:630069 Video about it starts at the 11:00 mark. https://www.youtube.com/watch?v=IBMMPBpZeHo |
#23
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Jack, I am aware of the low warp ABS, I haven't purchased any since it is over my $17/kg price point for filament. I purchased some 3/4" thick foam board for $8.38 from Home Depot: https://www.homedepot.com/p/3-4-in-...50705/202090272 and built an insulated enclosure (R2.89) for my 3D printer today, see attached picture. I am attempting to print a 1340/20 fin-can in ABS filament again, at high resolution it takes about 6 hours, if this works, problem solved.
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Bruce S. Levison, NAR #69055 |
#24
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It worked!, see first picture! I opened the enclosure 6 hours later and found an almost perfect ABS print of the 1340/20 fin-can with no warping or splitting. The second picture shows the latest print detached from the supporting material next to the ABS print from before that has warped and split fins. This ABS print is strong and flexible and very flight worthy.
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Bruce S. Levison, NAR #69055 |
#25
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#26
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VERY NICE, Bruce !
Put me in line for wanting one of your orange fin cans ! Really !
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When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, and HAVOC ! |
#27
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I agree, very well done Bruce, bravo!
I also would be pleased to be in line to obtain one of those fin cans. Red would be great. |
#28
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Great job, Bruce.
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-Wolfram v. Kiparski NAR 28643 - TRA 15520 MTMA Section #606 President |
#29
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Blender is a really powerful CG program that I've been playing around with, too. Below is a 3D model of a Cherokee-D that I made with Blender.
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Mike Fields |
#30
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How hot was the ambient temperature of the print chamber during printing? |
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