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[Subculture]

Wasn't aware that SWM did a pump based piston type module- they tended to use fixed tanks with propel/gas.

RPMtech and RCsub workshop did...

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It'll make it itch....

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Not seen such an animal....

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So you're a bit of a bender, Dave?

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I thought kit production was being farmed out?

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https://www.thingiverse.com/thing:3335693

[Subculture]

I got my Ender 2 from Gearbest, and although it took an ice age to ship, it all turned up okay. Creality aren't the best on quality control, I believe...

[Subculture]

If you're looking to print submarine hulls, worth looking at the delta/kossel type printers, as they're considerably quicker than Cartesian style printers...

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Unless you want to start cranking out very large prints, it's all you need.

I have an Ender 2, which is no longer available, but is a bit...

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Creality Ender 3.

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Pitch is taken at 0.7x radius...

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The formula is correct. Optimum prop pitch for scale subs tend to be from around 0.7-1.5 times the diameter. Higher pitch tends to be better for higher...

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Strongest would be a modified acrylic glue e.g Devcon plastic welder, stabilit express, super crylic etc. A bond with that is stronger than the subst...

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Twin parallel tank idea could be a bit of a sod to trim. I’d go for a single large tank and consider an aspirated tank for a boat this size with...

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You’ll find it tough going finding just a hull, as most buy the full kit. There is a chap here in the UK has a used Typhoon complete, needs a bit...

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Unlikely. The pumps are lightly loaded so the motors don't draw much current.

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Just google or eBay ‘Koge air pumps’ you’ll find lots of choice. Btw, 3 volt pumps work fine on 6 volts in my experience.