Install electric motor model boat

The method I use, calculates the power requirement from a full size boat of comparable design. Historic warships are easy - typically the exact performance is well documented.

Civilian ships and work boats can be difficult and may require that you use data from a tug to figure the performance of a trawler, for instance. Here I'm building a semi scale model of the famous PT at scale. These boats were built by Elco and had successively larger engines as the war progressed, and the boats got heavier and heavier.

For the sake of this exercise, let's pick the mid-war version at Three Packard Vs at 1,HP each. That's a total of 4,HP. Now there is only one little detail left - efficiency. The specified power on the full size engines is in mechanical Horse Powers on the motor output shaft. I can almost guarantee that the full size power train is more efficient than that on my model.

Therefore, take the calculated number as a minimum number. To select motors, we have to decide if we're going to use a single or multiple motor set-up and divide the total power with the number of motors used. So here the options would be:. He bought the kit and was wondering how to power her as a radio controlled model boat. Artesania Latina apparently didn't provide any help whether it being a suggested model boat motor size or any hint as to how the original boat was powered.

Given we have nothing to go by, this method is not as precise as if you have the original motor spec. However, I think we have a good shot at finding the exact motor size needed without any additional iterations. In this case I went to a book called " Boat Designs Reviewed".

This is essentially a sales catalog for the boat plans offered through Wooden Boat Magazine. One boat that caught my eye is called "Dynamo" designed by the legendary William Gardner - and she looks a lot like a fishing boat.

As you can see, the length, beam and weight are all right on. The 40W power indicates that the Graupner should be sufficient. It is rated at 35 to 75W. If the motor was selected, the boat would have much more head-room, but may run the risk of having too much power.

This can be cured by choosing an appropriate gear ratio. Most scale models do better with a gear box to swing a scale size propeller. Pitch Ratio — The ratio between the Pitch and Diameter. Pitch in general is always larger than the diameter.

Pitch — …. An important part of Radio Control Electric boating is keeping the equipment cool. Both the ESC and motor require water cooling in most cases in order to keep temperatures low. This will ensure the components will not fail by excessive temperature.

How …. When the hull is finally completed with a well suited power system, it is very important to follow these next few steps. More often then not, the first run for any hull usually is not the best, as you may think. Taking the next couple minutes to read the rest of this page will become …. There are several reasons equipment may heat up, causing a high operating temperature.

Many times there may be more than one reason for over heated equipment. In this case choose the most logical fix. Motor — High Operating Temperature Possible …. There are two types of outdrives that are commonly found on RC boats. These include the Stinger outdrive and strut drive. Stinger drives are usually only found on mono hulls. They house the prop shaft completely from the transom to …. Although Fast Electric FE boat maintenance appears to be minimal, there are still specific requirements that should be done following every run or every couple runs.

There are various ways of powering your sports boat eg, electric, diesel, steam, two and four stroke IC engines, even rocket power has been tried but highly illegal , the two most popular forms are two stroke or glow plug IC engines and electric motors. IC engines are used mainly in fast models as they will continue to run at full power until the fuel runs out. Electric motors are used in all aspects of boat modelling from submarines to drag race boats.

Electric motors are much more controllable than IC engines ie, they can be made to run from stop to full speed, re-started at will and can run backwards. Electric motors are also generally easier to install, run, maintain than IC engines and are cleaner too.