#11
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Mine was in PLA and finished pretty nice - just not easy.
As a chemist by day, I have access to tetrahydrofuran, which is supposed to soften PLA, like acetone does ABS. Well, it works, but just barely. What worked best for me was a light touch with a steel file and a lot of sanding. The 'design' sizing appeared to be the bottom of the ridges, so I had to take the shoulder down all the way smooth. I ended up using good old wood filler for the finishing touches on the upper portion. That worked fine. I was amazed at how the primer made ridges barely discernible quite visible.
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Charles McGonegal Ciderwright AEppelTreow Winery & Distillery Ad Astra Tabernamque! |
#12
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If one is not a "chemist" by profession, but needs access to Tetrahydrofuran, purchase 'thin type' PVC cement at any hardware chain. The main ingredient is the aforementioned solvent. It has an acrid reek unlike any other common solvent.
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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 ! |
#13
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I was going to object to the use of quotation marks around the word chemist - but I just checked our org chart, and discovered that my role has been renamed since I last looked. I'm now a 'R&D Scientist 2'.
So quote away.
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Charles McGonegal Ciderwright AEppelTreow Winery & Distillery Ad Astra Tabernamque! |
#14
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Quote:
The Jupiter C body is shorter, which is why Estes used the larger fins. The real Mercury Redstone had extended tanks compared to the original Redstone missile. IIRC, the Jupiter C was a standard Redstone with tapered warhead removed and cylindrical section in its place to mount the platform that spun up the Seargent stages.
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I love sanding. |
#15
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Quote:
Doug .
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YORF member #11 |
#16
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So bought a new MR at hobby Lobby with 40% off got it for 15 bucks. ordered the molding oldies nosecone set so figure I will cut the BT down and use the leftover capsule and body tube to build a mercury little Joe.
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NAR # 102461 SR I have orbited the earth with John Glenn, walked on the moon with Neil Armstrong, landed on Mars, seen Jupiter and Saturn and explored the realm of deep space all thanks to Model rocketry. God Bless America and The United States Marine Corps |
#17
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Guys,
Jupiter C also had extended tanks, just not as extended as the Redstone version. See the attached from the NASA website. Or check Peter Alway's Rockets of the World and 14 U.S. Army Missiles of the Cold War. 13.75" for the missile, 17" for Jupiter C and Merc at 19.67" on a 2" diameter body (1/35 scale). Note that if your Jupiter C cone includes a section of cylinder you need to subtract that length from the 17".
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NAR 79743 NARTrek Silver I miss being SAM 062 Awaiting First Launch: Too numerous to count Finishing: Zooch Saturn V; Alway/Nau BioArcas; Estes Expedition; TLP Standard Repair/Rescue: Cherokee-D (2); Centuri Nike-Smoke; MX-774 On the Bench: 2650; Dream Stage: 1/39.37 R-7 Last edited by MarkB. : 10-19-2016 at 08:27 PM. Reason: Math- checked the lengths |
#18
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Quote:
Great Mark Thanks for the measurements and all the advice guys Looks like graphics will be easy only marks I see on photos are the black roll pattern, the vertical stripe on the "tub" booster under explorer, black diaganol on top and the UE designator.
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NAR # 102461 SR I have orbited the earth with John Glenn, walked on the moon with Neil Armstrong, landed on Mars, seen Jupiter and Saturn and explored the realm of deep space all thanks to Model rocketry. God Bless America and The United States Marine Corps Last edited by leftover : 10-24-2016 at 08:31 PM. |
#19
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Like this:
Warhead from Shapeways; Original Estes Jupiter C Nose; Fin cans from jharding; tubes from Semroc. Maybe this winter, I'll get to them.
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NAR 79743 NARTrek Silver I miss being SAM 062 Awaiting First Launch: Too numerous to count Finishing: Zooch Saturn V; Alway/Nau BioArcas; Estes Expedition; TLP Standard Repair/Rescue: Cherokee-D (2); Centuri Nike-Smoke; MX-774 On the Bench: 2650; Dream Stage: 1/39.37 R-7 |
#20
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Nosecone set came its perfect
Fin cans came from shapeways and they are awesome, so much so I bought 2 more Ready to build, once I finish my Gt and Mercury Atlas
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NAR # 102461 SR I have orbited the earth with John Glenn, walked on the moon with Neil Armstrong, landed on Mars, seen Jupiter and Saturn and explored the realm of deep space all thanks to Model rocketry. God Bless America and The United States Marine Corps Last edited by leftover : 11-06-2016 at 04:38 PM. |
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