# The Dutch build
**URL:** https://foil.zone/t/the-dutch-build/2505
**Category:** Builds
**Created:** [August 12, 2018, 5:04pm UTC](https://foil.zone/t/the-dutch-build/2505 "2018-08-12T17:04:51Z")
**Posts on this page:** 19
**Page:** 2
### Author:  [@Thijs](https://foil.zone/u/Thijs)
#### Post date: [October 25, 2018, 1:12pm UTC](https://foil.zone/t/the-dutch-build/2505/22 "2018-10-25T13:12:37Z")
Hi fellow builders,
Hereby a little update:
I bought 2 other props; 7 7/8 x 7.5 honda 5hp prop
One lathed down to ±140mm
I still have the 7.25x5, I just lathed the hole to 12mm to fit on my new shaft. 
I will still use my reisenauer 6:1
I will use my new Typhoon HET 700-98-670
  
Saturday I will test the 3 different props with different motortiming and measure the thrust and amperage. Hopefully make another run when everything looks safe 🙂
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### Author:  [@Thijs](https://foil.zone/u/Thijs)
#### Post date: [November 22, 2018, 12:00pm UTC](https://foil.zone/t/the-dutch-build/2505/23 "2018-11-22T12:00:44Z")
btw, the motors could be bought rediculour cheap at [http://www.rc-warbirds.com/product\_info.php/products\_id/1131](http://www.rc-warbirds.com/product_info.php/products_id/1131)
only 80dollar
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### Author:  [@philgib](https://foil.zone/u/philgib)
#### Post date: [November 22, 2018, 1:00pm UTC](https://foil.zone/t/the-dutch-build/2505/24 "2018-11-22T13:00:09Z")
Hi Thijs 🙂
When reading about your motor specs, the shaft seems to be 8mm
But then you have a 6:1 Reisenauer…
So I guess you lathed down the motor shaft to 5 mm ?
Thank you
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### Author:  [@Thijs](https://foil.zone/u/Thijs)
#### Post date: [November 22, 2018, 1:10pm UTC](https://foil.zone/t/the-dutch-build/2505/25 "2018-11-22T13:10:06Z")
HI Phil, yes, Please see my reaction in this topic, how I lathed it down. Just took me 20 mins 😄
> **[Any idea about which flange to use for SSS56104 and Super Chief?](https://foil.zone/t/any-idea-about-which-flange-to-use-for-sss56104-and-super-chief/3099/16)**
>
> For anyone who is planning to use the reisenauer motorchief, I have a simple solution to lathe the motor shaft down to fit the pinion: First I connected my motor to the esc and batteries etc Clamped down the motor, covering any holes of the...
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### Author:  [@philgib](https://foil.zone/u/philgib)
#### Post date: [November 22, 2018, 1:13pm UTC](https://foil.zone/t/the-dutch-build/2505/26 "2018-11-22T13:13:11Z")
OK. Well that obviously worked !
Quick one : why not taping around the motor + reisenauer with metal tape ? That would make it somehow waterproof, while still cooling down ?
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### Author:  [@Thijs](https://foil.zone/u/Thijs)
#### Post date: [November 22, 2018, 1:21pm UTC](https://foil.zone/t/the-dutch-build/2505/27 "2018-11-22T13:21:27Z")
Well I tried that in my first design(with the blue motor), however there are some concerns:
- How do you waterproof the front end of the motor (near the mast)?
o Perhaps you could glue the front part in a mast clamp
- The motor is not designed to distribute the forces trough the motor housing, my blue motor was made of very thin aluminium.
o Perhaps other motors are constructed more beefy and have a stronger body
- The Reisenauer only has a bearing, this bearing is not waterproof.
o This is why you need some kind of housing around the reisenauer with a lip-seal.
Not sure if tape would work; don’t forget that you have about 0.1bar of water pressure under 1 m of water. Water will slip trough tiny gaps(capillary?) very easily! ‘somehow waterproof’ is not good enough 😉
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### Author:  [@philgib](https://foil.zone/u/philgib)
#### Post date: [November 22, 2018, 2:51pm UTC](https://foil.zone/t/the-dutch-build/2505/29 "2018-11-22T14:51:53Z")
Thijs please one more question…
Where did you get that coupler which you screw on the Reisenauer ?
When looking at Reisenauer catalog, I see only a 10mm shaft and no coupler ?
Thanks again
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### Author:  [@Thijs](https://foil.zone/u/Thijs)
#### Post date: [November 22, 2018, 3:00pm UTC](https://foil.zone/t/the-dutch-build/2505/30 "2018-11-22T15:00:14Z")
This is just how it’s delivered. You can screw in a m10x1(fine metric!!!) Shaft.
I lathed a new shaft at the workshop at my work.
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### Author:  [@Jezza](https://foil.zone/u/Jezza)
#### Post date: [November 22, 2018, 3:22pm UTC](https://foil.zone/t/the-dutch-build/2505/31 "2018-11-22T15:22:04Z")
I found these guys in the UK:
[https://www.accu.co.uk/en/double-ended-threaded-bars/469050-HTBD-M10-80-13-A4](https://www.accu.co.uk/en/double-ended-threaded-bars/469050-HTBD-M10-80-13-A4)
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### Author:  [@philgib](https://foil.zone/u/philgib)
#### Post date: [November 22, 2018, 3:22pm UTC](https://foil.zone/t/the-dutch-build/2505/32 "2018-11-22T15:22:19Z")
OK… See the way the Super chief is delivered… No coupler…
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### Author:  [@Thijs](https://foil.zone/u/Thijs)
#### Post date: [November 22, 2018, 3:58pm UTC](https://foil.zone/t/the-dutch-build/2505/33 "2018-11-22T15:58:48Z")
Unfortunately this wont fit in the m10x1 thread. You could use this and cut off the head cap:
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### Author:  [@Alexandre](https://foil.zone/u/Alexandre)
#### Post date: [November 22, 2018, 4:15pm UTC](https://foil.zone/t/the-dutch-build/2505/34 "2018-11-22T16:15:21Z")
Will not fit , need to be m10x100 ( fine)
For the super chief with the polygone 6x7 shaft you can use this:
> **[AXi Konusnabe f. starre Luftschraube 10mmSUPER-CHIEF 6x7](https://www.reisenauer.de/aid-1827-AXi-Conical-hub-for-composite-propeller-10mm-br-SUPER-CHIEF-6x7.html)**
>
> Reisenauer Präzisionsantriebe,Reisenauer Getriebe, Planetengetriebe, Micro Edition,Super Chief, Motor Chief,Spinner,Klemmmittelstück,Brushlessmotor,Lipo Akku,Brushless Regler,CFK Propeller,Holzluftschrauben,Luftschraube,RS E...
For the super chief round 6mm shaft , you can use a " classic" coupler
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### Author:  [@Louis](https://foil.zone/u/Louis)
#### Post date: [June 9, 2019, 12:23pm UTC](https://foil.zone/t/the-dutch-build/2505/35 "2019-06-09T12:23:55Z")
Wat a succes Thijs, i m from the Netherlands as well. Any updates ? I learned a lot from this topic
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### Author:  [@Thijs](https://foil.zone/u/Thijs)
#### Post date: [June 9, 2019, 6:04pm UTC](https://foil.zone/t/the-dutch-build/2505/36 "2019-06-09T18:04:42Z")
Hi Louis, thanks! Are you foiling already? No updates means good news I guess.
Only my pinion came lose twice… the strongest loctite is just not strong enough!
I still use my lathed propellor, I believe it’s really efficient. I also bought 2 tiny longtailboat props in cambodia which I want to try out soon.
The hole is tapered. In the picture I put some epoxy around a 10mm shaft which I greased with Vaseline. Now it’s stuck however 😅
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### Author:  [@Louis](https://foil.zone/u/Louis)
#### Post date: [June 9, 2019, 7:22pm UTC](https://foil.zone/t/the-dutch-build/2505/37 "2019-06-09T19:22:17Z")
No flying yet 🙂 About 10 years ago I already made electric outboards etc.
Later a Lampuga kinda Jet surfboard. But so much power and battery needed with a Jet surfboard, now with foiling so much better.
I always thought we need to have prop rpm of about 2500 rpm, most outboard props were designed to stay around that rpm. I see many people here with about 4500 rpm prop speed, maybe with foiling we have so much less drag ? The torqeedo prop even is 1400 rpm. seems that slower rpm with more pitch better efficiency ? Well maybe this different with a hydrofoil.
I also see a small self priming pump, does that work good ?
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### Author:  [@Thijs](https://foil.zone/u/Thijs)
#### Post date: [June 10, 2019, 8:42am UTC](https://foil.zone/t/the-dutch-build/2505/38 "2019-06-10T08:42:32Z")
Impressive! I d like to see that design.
Low rpm with high pitch asks for a high torque; something a small diameter motor cannot deliver. High torque draws a lot of amps or a large ratio reductor. It’s just a matter of the right balance.
The self priming pump works fine, though I would go for another type(window wiper type) as I always have to suck on the tube go get it started.
Btw maybe you, or someone else is interesting in an huge(2kwh)li ion prismatic battery pack? Its to heavy for my project after all… 20kg…
Including a Bluetooth 90amp bms(8-24s) it can go for 250eur.
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### Author:  [@BenP](https://foil.zone/u/BenP)
#### Post date: [September 10, 2019, 2:44pm UTC](https://foil.zone/t/the-dutch-build/2505/39 "2019-09-10T14:44:34Z")
Is it possible to share your mast clamp 3d files ? Thank’s
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### Author:  [@SoEFoil](https://foil.zone/u/SoEFoil)
#### Post date: [September 11, 2019, 4:33pm UTC](https://foil.zone/t/the-dutch-build/2505/40 "2019-09-11T16:33:26Z")
> [@Thijs](#):
>
> I also bought 2 tiny longtailboat props in cambodia which I want to try out soon.
Have you been able to test your longtailboat propellers ?
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### Author:  [@Thijs](https://foil.zone/u/Thijs)
#### Post date: [September 12, 2019, 5:50am UTC](https://foil.zone/t/the-dutch-build/2505/41 "2019-09-12T05:50:59Z")
Actually I’ve been foiling with it ever since! Unfortunately my amp meter is broken. My findings: less aggressive/acceleration then the (higher pitch) lathed prop, but smooth foiling and higher in rpm. I also have the feeling that it’s much more efficient. I gave the same prop to @marc87, he has a working amp meter. Hopefully he will have some figures soon.
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