[PSUBS-MAILIST] Plastic Propeller

Fri Apr 14 09:27:46 EDT 2017

Excellent!  Looking at the 3-D printing site, they have a number of
plastics.  How did you land on ABS? Did you consider polycarbonate?  Was
there a big cost difference between ABS and polycarbonate?

Cliff

On Fri, Apr 14, 2017 at 8:08 AM, emile via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Cliff,
>
>
>
> Not only my work. I use a online 3 D print shop like .
> https://i.materialise.com You can even choose titanium!
>
> The 170 mm , 6 blade prop cost abt.€ 350,-
>
> No idea about the stepover but surface finish is good enough. I spray
> painted the prop; that will work against UV. It was for several months in
> the water and even that proved no pb.
>
>
>
> Br, Emile
>
>
>
>
>
> *Van:* Personal_Submersibles [mailto:personal_submersibles-
> bounces at psubs.org] *Namens *Cliff Redus via Personal_Submersibles
> *Verzonden:* vrijdag 14 april 2017 14:42
> *Aan:* Personal Submersibles General Discussion
> *Onderwerp:* Re: [PSUBS-MAILIST] Plastic Propeller
>
>
>
> Emile, I am interested in the work you did on 3D printing of a thruster
> prop using ABS.  Can give us more detail? Did you use an online service to
> print the prop?  What was the cost?  Did you work off a 3-D model file like
> a STEP file?  What was the surface finish?  What incremental steps did you
> have to make (surface finish, machinating...) before mounting?  Did you
> explore any other materials than ABS?  How well has the prop held up?  How
> well do you think the ABS will handle UV?
>
>
>
> Best Regards
>
>
>
> Cliff
>
>
>
> On Fri, Apr 14, 2017 at 4:35 AM, emile via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Alan,
>
> The propellor from my rimdrive thruster is 3D printed in ABS.
> Seems strong enough.
>
> Emile
>
> -----Oorspronkelijk bericht-----
> Van: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org
> ]
> Namens Alan via Personal_Submersibles
> Verzonden: vrijdag 14 april 2017 3:24
> Aan: Personal Submersibles General Discussion
> Onderwerp: Re: [PSUBS-MAILIST] Plastic Propeller
>
> Thanks Ian, Greg & Hank.
> Ian, I hadn't thought of that 2 propeller type bow thruster as a left hand
> propeller source. I will track one down & test it. I can always trim the
> diameter down a bit if it is in the ball park. The price isn't too bad
> either. If we could print our own propellers, that would be awsome.
>    Greg, the motors I am using are rated for 50 Amps continuous & I am
> using
> a direct drive. In my calculations, I would need to go to a really low
> pitch
> prop if I went to a larger diameter, & I haven't seen anything that low. I
> was using a 7&1/4" 2hp Yamaha prop for testing & it only drew 33 amps. It
> will be a matter of pool testing a few of these props & finding a good
> economy of Amp draw & thrust but it is being dictated to a degree by what I
> can get in right & left hand.
>    Hank, looking at these propellers again, it would be very difficult to
> cast them.
> If I made a silicone mold I'd never get the part out. It would also be
> difficult to get resin in to the blade area & get air out.
> Found out that the new motors I ordered are being used commercially on
> electric surf boards, so I can't be too far off track.
> Cheers Alan
>
>
>
>
> Sent from my iPad
>
> > On 14/04/2017, at 12:32 PM, irox via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
> >
> >
> > Hi Alan,
> >
> > it might be a bit big for you, but the smallest cheap counter rotating
> > prop set I've found is from "Quick", they do a 4 blade 185mm in RH and
> > LH for $40-$80 (depending on where you order them).  Part numbers:
> > BTQ185 LH (QI55507)
> > BTQ185 RH (QI55508)
> >
> > http://www.quickusastore.com/bow-thrusters/spare-parts/bow-thrusters-p
> > ropellers.html
> >
> > I got a pair and installed the on cheap ($45) trolling motors.  They made
> a big difference over the stock props, but of would probably burn out the
> cheap trolling motors quickly.  I didn't get around to look into reducing
> the diameter to better match the motors (plus I want to use better motors
> anyway).
> >
> > An SLA 3D Printer may be able to print something which could be used
> (after UV curing).
> >
> > Cheers,
> >  Ian.
> >
> > -----Original Message-----
> >> From: Alan via Personal_Submersibles
> >> <personal_submersibles at psubs.org>
> >> Sent: Apr 13, 2017 4:52 PM
> >> To: personal_submersibles at psubs.org
> >> Subject: [PSUBS-MAILIST] Plastic Propeller
> >>
> >> Greg, (or anyone else as knowledgeable) I am going to test a Vetus
> >> 146mm propeller soon. On paper it seems a good match to my motor. I
> >> have not seen a left hand prop (which I
> >> need) & the right hands go between $56- & $100-. Also I may need a
> >> slightly smaller diameter. They are made of delrin.
> >> Is there an easy / inexpensive way of replicating something similar?
> >> I was thinking they could be printed & the print used as a lost wax
> >> type aluminium casting.
> >> I could make a silicon mold from a print & cast a fiber reinforced
> >> propeller, but aren't sure about the strength & quality I could get.
> >> Any thoughts on the best way of doing this?
> >> Thanks, Alan
> >>
> >>
> >> Sent from my iPad
> >>
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