Miss K OffShoreElectrics Kit (wood built)

[eric_laermans]

Wood? ...and glassfibre to prevent from water soaking into the wood

http://www.youtube.com/watch?v=R-INcVe3HwY

[eric_laermans]

Well, to be quite honest...

The kit
This kit is offered by OffShoreElectrics and is very easy to build. Actually, nothing can go wrong and the building steps are well documented with photographs of all sorts. I installed a 3,2mm flex-cable and mounted the motor as far to the rear as possible in order to obtain as much flexibility as possible considering the CofG.

The gear installed in the kit
I tried different setups and am using a 2.600mAh Hyperion 35C LiPo in the movie clip combined with a Leopard 2850 5280kV and a 29mm K-prop (Graupner) and it works fine. I also tried a 5.000mAh Hyperion LiPo and it runs fine too. It is very important not to place all the gear in the middle. I think two LiPos, one at every side (left and right) of the roundnose would workout just great and even a K-33,5 prop would do great. Remember, that would propel her at speeds of approx. 70kmh.

Scale speed
As you probably all know these roundnoses were capable of speeds around 320kmh. According to the law of physics scaled down to a scale of 1:16 this would result in:

320kmh / sqrt 16 = 80kmh

Well... 80kmh I consider possible when the weight is even distributed in the roundnose (left/ right) and the total weight is not too low. Yes, too low! This small vessel is capable of being loaded up to approx 1.400gr.

[JimClark]

Pictures of the boat please

[eric_laermans]

Foto1.JPGFoto2.JPG

The ETTI 150A Controller (from OSE) is perfect for this boat. Perhaps considered a little oversize, but I prefer a little overcapacity in this respect. Besides, if one wants to do SAW this controller can be of use too.

[eric_laermans]

Foto3.JPG

[JimClark]

Would you like a vacuum formed cowl for that boat? I think I have one you can have

[eric_laermans]

Hello Jim,
Actually, this is my first attempts to build a scale-like roundnose. I saw one Miss Bardahl from your hand and realize that I still have a lot to learn. Therefore I set my standards not that high and allow myself some time to gain skills. Starting out with the Miss K wood-kit, I replaced the top by glassfibre which I hoped saved weight. This was not the case though and actually was a lot more time consuming to get right (and it still isn't). The cowl I had to build myself, because I wanted it to be like the original:

1.jpg

The original cowl which is provided with the kit has a different construction:

3.jpg

And this is the endresult:

2.JPG

[BHChieftain]

Is this the 1/16 or the 1/12 kit?

[JimClark]

1/16th kit

[eric_laermans]

Indeed. With the powers available nowadays (LiPo) it sails like 1/12th scale... To be quite honest. The 1/16th scale model I built was designed by the famous Gary Finlay for the powers available back then. I.e. NiMh cells combined with brushed motors. Using only a 2s 7.4V 2.600mAh LiPo-pack makes her run at great speeds for three to four minutes, supplying ample power.

[BHChieftain]

What temps do you see with that kv motor?
Chief

[eric_laermans]

The motor stays cold (45dgrs Celsius/ 113dgrs Fahrenheit). It is important to use the right lubrication of the axle (no grease, only teflon spray) and have a little slope in the axle to prevent it from dragging/ plowing through the water.

If I had to build it again I would have taken a 5280kV / 2 = 2640kV (approx 2600kV) motor on 4s and use two 2s LiPo packs in series, one at either side of the roundnose. This will keep the roundnose more stable and prevents her from slightly lifting one of two sponsons out of the water. As I mentioned earlier, it was not designed for the powers available nowadays. Still, it is very much fun building and sailing a kit like this .