Everything you need to know about how to choose the perfect brushless rc motor (car, helicopter and boat) hobby warehouse rc cars 7 cases movie


If you’re checking out what improvements you could make to your favourite RC model or even attempting to build one from scratch, one of the most important things you can consider is the suitability of your motor. Is it powerful enough for your requirements? Is it suited to the type of work you want it to do? How should you go about choosing between similar looking options? All very valid questions – and we have the answers! So if you’re ready to spend less time finding the perfect motor and more time using it, then check out this.

We’ll start with a quick cheat: the manufacturer’s recommendation. hp gas online registration Not for the model you’re starting with, but for the model you want to have when you’re done! If your RTR model has an upgraded version or official hop-up motor on the market, or your kit’s spec sheet has a few recommended motor ratings, then check it out, because it’s the ultimate short cut. Even those of you who aren’t working from a kit or pre-existing model – or who are upgrading from a brushed motor and don’t have a brushless recommendation listed – can help yourselves out by looking at the manufacturer’s suggestion for a brushless model similar in size, weight and function to that you are working on. When time or mental energy is short, it’s the quick way out!

Even if you don’t want to take that at face value, a recommendation will also flag up some of the varied factors you need to pay attention to, including the motor’s KV rating, wattage, amperage and, of course, dimensions. gas after eating These will be the main features you’ll use to determine which motor is right for you, so at the very least it’s a good start. [Note: if you’re unfamiliar with any of these terms and want to know more, we have a great article about brushless motor classification in the knowledge base and certain definitions in the glossary, so check out those.]

Now, time for the details. You want to estimate whether your motor will benefit from having high torque/low RPM, low torque/high RPM, or something in the middle. For vehicle/speedboat drivers, this will depend on how highly you value your model’s top speed compared to how much you care about sharp, powerful acceleration. u gas station A higher KV rating means a higher top speed but less torque, while a lower KV rating means powerful torque but a lower top speed. Unfortunately it’s on a sliding scale, and you can’t have both! As a guide, a good KV rating for a 1:10 scale brushless buggy or 400mm race/sport balanced speedboat motor is 3300KV – a smaller or more on-road/racing-focussed model will want a higher KV rating, whereas a larger or more off-road/sport-focussed model will want a lower one.

For those of you running aircraft, you’ll likely have a recommended propeller size and a recommended RPM to spin it at, which will determine how much – and what kind of – power your motor will need to supply. We’ll start with the amount of power, since that is arguably more important for you guys – you want to go with the smallest, lightest motor possible (unless you’re using it to rebalance the craft somehow), but not one that will be too weak and burn out. If your prop/RPM combination comes in at, for sake of argument, 100 Watts, you’re looking for a motor that does about 110. Now, finding out how much power your prop/RPM combination will draw is the tricky part. electricity in water Forums can be a great help if you’re happy to trust amateur advice, and there are a few handy online calculators out there, but it may still come down to trial and error, or – the golden clue – trusting a manufacturer’s motor Wattage recommendation.

As for the KV rating of an aircraft’s motor, the call you have to make is much the same as that for model vehicles. A focus on high RPM or a smaller propeller will push you towards a high KV rating, whereas a large propeller or lower target RPM will require more torque than speed, and so be better suited to a lower KV rating. You might also want to consider your flying style; higher speeds will prefer a higher motor KV, whereas slower manoeuvring and stunts will prefer a lower one.

Everyone will also need to choose between direct drive vs. gearbox systems, and outrunner motors vs. inrunner motors. gas laws This is easier than it sounds, as most of you will be going with a simple direct drive inrunner anyhow; to find out if this is your best option, multiply your prospective motor’s rough KV rating by the number of Volts supplied by the battery you’ll be using it to get the max. RPM it will produce. e payment electricity bill up Greater than 12,000? Then it’s a direct drive inrunner for you. Motors for models such as the buggy we mentioned above probably won’t come in any other form, but this is the kind of thing it’s good to know just in case.

If you’re looking at a motor that will run at under 12,000 RPM, as used on some aircraft, you have a few more options. electricity freedom system Your best bets are to run either a direct drive outrunner motor or a gearbox-operated inrunner one. The former is quieter and easier to use, but the latter can be more efficient and easier to customise or adjust. Price can also be a factor, with outrunners sometimes costing a little less. It’s up to you.

Amongst all these variables, however, one thing is always true: whatever the model you’re trying to create, more motor efficiency is ALWAYS better. z gas guatemala You might have to weigh it up against other factors if you’re shopping on a budget, but there is no thing as too little efficiency. Effectively this percentage shows you how much of the electricity drawn by the motor is actually used to create movement in the model, with any surplus (for example 8% if your motor runs at 92%) simply being lost to pure heat generation. Which is bad, bad, bad! Greater efficiency = less heat = less waste = greater run times, not to mention a motor that is less likely to overheat and damage your model. It really is as simple as that!

So, now that you hopefully have a good idea of what to look for in your next brushless motor, why not check out how to choose the perfect ESC and battery to match? We’ve got it all set out in our “How to Match the ESC, Motor and Li-Po Battery in a Brushless RC Vehicle” article (you don’t have to be using a vehicle), designed to make it even easier to achieve the perfect RC setup. What are you waiting for?