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#21
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No clearance at mine. What motors? The Leaper went on clearance after last year's stock reset!
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Bernard Cawley NAR 89040 L1 - Life Member SAM 0061 AMA 42160 KG7AIE |
#22
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It was the pack with an A8-3, B6-4 and C6-5. Hadn't seen them on the hanger with the other packs in a while, then suddenly a couple packs in the clearance bin. Who knows, someone may have found them in a corner in the stock room. But they were 50% off
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#23
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I happened to get the two packs of that SKU that my HL put on 50-off clearance, too. Have been back a couple times looking for more, haven't seen any. My wallet was itchy the last time, so I picked up a 220 Swift to bash into a tiny Alpha. |
#24
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Ah, right, the Rocket Science pack. I didn't see them today at my local HL....and haven't for awhile. I always wondered why they carried that one, since they never carried the Rocket Science Starter Set that that motor pack was, it seems to me, aimed at. I'd forgotten about that one.
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Bernard Cawley NAR 89040 L1 - Life Member SAM 0061 AMA 42160 KG7AIE |
#25
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Correct. Paramount paper tubing is not interested in running small lots of off-size paper tubes. It takes away production time when a machine has to be shut down, a new size mandrel installed, test batches of tube made then inspected. Lost production time = lost money. Paramount would rather make large batches of standard/popular tubing sizes. One small rocketry manufacturer tried to get a run of Centuri ST-18 tubing made. Paramount told them the mandrel to make that tubing had been 'lost'. eRockets/Semroc is not going to make balsa nose cones and fins for tubing it can no longer acquire.
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Bob S.A.M. # 0014 |
#26
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Could we see a changeover to 3D printed tubes? I typically use my printer for nose cones and transitions, still use balsa/bass for fins and cardboard tubes. But using 'vase' printing you can get a very thin tube wall that is very light weight. Using a higher heat resistant plastic or some type of interior coating to protect from the ejection charge. Now you can recreate any model you want.
Chris Taylor has been talking about doing just that over on the NAR forum. His "Trust in Thrust" YouTube site (https://www.youtube.com/@trustinthrust7847/videos) is dedicated to rocketry and 3d printing. Plus his other site "Today's 3D Print" (https://www.youtube.com/@nerys71/videos) includes a number of rocketry prints as well. Not being able to get something as basic as body tubes could open up a bunch of new avenues and ideas to fill that void.
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#27
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There are many vendors making reasonably good quality carbon fiber tubes in China. At least one of them makes walls down to 0.5mm and the parts look nice. But that's high speed, MPR and HPR stuff. I think they will always be better than 3D printing.
If an order was big enough, you could probably get them do make a mandrel to make rocket sizes. But the cost basis and the weight will never be anywhere close to cardboard. |
#28
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A single manufacturer, with the monopoly, now dictating what they will and will not make? That sounds like an opportunity, in a free market society.
A (model rocketry) world without cardboard tubes? That sounds positively post-apocalyptic. It would be bad enough to be limited to just a handful of Estes and Quest diameters, which seems to be where we are headed. What if we were stuck with making Centuri/Enerjet models with Estes/Quest parts only, how depressing. It may be time to become proficient at both tube construction and balsa turning. Last edited by Tramper Al : 04-01-2023 at 08:38 AM. |
#29
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I'm dealing with a custom kit that uses 3d printed parts in ABS (for heat resistance), and sanding the parts to something resembling smooth is time consuming. I would NOT be interested in having to routinely process body tubes in the same way. Heck with that. |
#30
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Will this apply to Brick & Mortar shops too? Guess I'll find out soon. The LHS around here usually take 10-20% off retail.
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Paul If we weren't all crazy, we would go insane - Jimmy Buffett NAR #87246 www.wooshrocketry.org |
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