Model Boat Mayhem
Technical, Techniques, Hints, and Tips => 3D CAD Design & Printing => Topic started by: redpmg on August 08, 2019, 09:56:23 pm
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Anyone lucky enough to have a 3d printer - here's a give away of a water jet - looks good
https://cults3d.com/en/3d-model/various/water-jet-propulsion-system-janikabalin
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I'd print it right now but it wants a subscription, so no thanks this time. Looks good though, nice smooth plenum compared to allot out there.
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That's odd - already downloaded by a couple of others ......
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Just checked it out, asking for a subscription here as well. Looking at your design there is one thing of concern, you have the impeller at the end of a relatively long unsupported shaft with just one bearing. Unless the impeller is perfectly balanced will this not allow it rub on the casing? The Graupner jets in their pilot boat have a second bearing behind the impeller.
Jim
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Hi it's John V I have been testing Jet drives for model boats I agree on that one it needs a second bearing .but hue am I to say cheers John V
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Not my design - simply came across the link- and thought it might be of interest to some- criticise the designer if you like - however if you have a 3d printer and the software for it should be easy enough to convert to two bearings.
I often do that with Corel on old plans that are mostly iffy - noticed the jet does not have a weed grid either.
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If anyone wants the files for this water jet, PM me.
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Go to rcgroups jetboat forum theres a free set of plans available for a jet pump and a lot of good info too plus they are upgrading and changing things to improve the design all the time.I have a very large 45 mm version someone else printed for me for free .
https://www.rcgroups.com/jet-drive-boats-1004/