Electric Surf Board

Boats, Jet Skis, Kayaks etc., including hovercrafts
ropower86
100 mW
100 mW
Posts: 45
Joined: Dec 05, 2016 7:50 pm

Re: Electric Surf Board

Post by ropower86 » Dec 04, 2017 7:25 pm

ropower86 wrote:
Dec 04, 2017 7:21 pm
ropower86 wrote:
Dec 04, 2017 7:18 pm
chris_kline wrote:
Dec 04, 2017 1:22 pm
ropower86 wrote:
Dec 04, 2017 6:57 am


Wow, you are flying and putting this together pretty fast! Do you have some engineering background in the watercraft field or some sort? It had taking me a verrrrrrryyyy long time to put a jet drive together. :lol:

About your tig job you did pretty good, I use to be a top-flight in tig welding, I had the welds coming out like a roll of gold coins. But that was 13 years in the field but I opt out because I now have bad eyesight.
cheers. i dont have engineering background with watercraft. but i do have 20 years in automotive design manufacturing.

do you have some pics of some of your old welding projects? would be cool to see those perfect welds!
I have pictures but I have it on the flash drive stashed in my safe box in Florida. But I will check my computer for any pics.

srn
1 mW
1 mW
Posts: 15
Joined: Sep 21, 2017 8:50 am

Re: Electric Surf Board

Post by srn » Dec 05, 2017 12:44 am

ropower86 wrote:
Dec 04, 2017 7:18 pm
srn wrote:
Dec 04, 2017 3:31 pm
here my mould out of PE.
How many impellers have you made out of the PE's negative mold?
At the moment two. The second one has already the quality that I want for my prototype.

Frizzo
1 mW
1 mW
Posts: 12
Joined: Nov 27, 2016 6:07 am

Re: Electric Surf Board

Post by Frizzo » Dec 05, 2017 11:06 am

Hey ropo, here is a tutorial for designing a propeller in inventor:

https://www.youtube.com/watch?v=-iVDzhGvre4

for the cast, just do a boolean difference between the propeller and a block of the right size. then you could also 3d print or cnc machine the mould. If you 3d print it, then use ABS so that you can smooth cemically the surface. I´m planing right now to cnc it. Sadly I have not a cnc mill and no 3d printer. So my progress is really really slow, since I have tro wait for others to get my stuff done. :cry:

srn
1 mW
1 mW
Posts: 15
Joined: Sep 21, 2017 8:50 am

Re: Electric Surf Board

Post by srn » Dec 06, 2017 11:01 am

I used PE because Epoxid Resin should not stick to it.

But because of a too rough surface, it is sticking like hell ..

For my second Impeller, I applied normal candle wax on the surface.
This worked very well.

ropower86
100 mW
100 mW
Posts: 45
Joined: Dec 05, 2016 7:50 pm

Re: Electric Surf Board

Post by ropower86 » Dec 10, 2017 9:46 pm

Frizzo wrote:
Dec 05, 2017 11:06 am
Hey ropo, here is a tutorial for designing a propeller in inventor:

https://www.youtube.com/watch?v=-iVDzhGvre4

for the cast, just do a boolean difference between the propeller and a block of the right size. then you could also 3d print or cnc machine the mould. If you 3d print it, then use ABS so that you can smooth cemically the surface. I´m planing right now to cnc it. Sadly I have not a cnc mill and no 3d printer. So my progress is really really slow, since I have tro wait for others to get my stuff done. :cry:
Frizzo, thanks for the video. Now I just have to make time to watch and learn. Yeah, it sucks not to have access to these wonderful machines. I had to get me a 3d printer and it is amazing just to print parts at home, I was paying a guy to 3d print parts for me and it adds up really fast it gets really expensive. I am in the same boat as you as it is a slow process making parts. :(

ropower86
100 mW
100 mW
Posts: 45
Joined: Dec 05, 2016 7:50 pm

Re: Electric Surf Board

Post by ropower86 » Dec 10, 2017 9:51 pm

srn wrote:
Dec 06, 2017 11:01 am
I used PE because Epoxid Resin should not stick to it.

But because of a too rough surface, it is sticking like hell ..

For my second Impeller, I applied normal candle wax on the surface.
This worked very well.
You should use pva film that is used in mold release to make it a whole lot easier for you. By any chance do you share your cad file of the mold?

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