Electric Flight Specialist since

Electric Flight Specialist since 1999

Like the idea of electric flight? but confused by technical data and component specifications? We we have listed some basic bits of information for your understanding and to explain factors that make up a successful electric flight package.

If you are wary about understanding the technical facts read the please do not try to learn everything initially. We can answer questions and advise accordingly. You may consider looking at our FAQ's page for answers to common questions.

If you are considering the change from IC power to electric you need to replace the engine, fuel tank, throttle servo and associated linkages with a suitable electric motor, electronic speed controller (ESC) and battery pack. Most modellers use Lithium batteries to power the motor, you may want to read our guide to safe use of this type of battery.

Power in electric flight is usually measured in watts. For example: 1 horsepower = 746 watts. Watts are calculated by multiplying volts x amps. Example: 10 volts x 10 amps = 100 watts The amps (current) are supplied from the battery via a speed controller to the motor, result power that turns the prop.

You can determine the power requirements of a model based on the Watts per Pound guidelines found below, using the flying weight of the model (with battery) 50-70 watts per pound is the minimum level of power for decent performance, good for lightly loaded slow flyer and park flyer models

70-90 watts per pound; Trainer and slow flying scale models

90-110 watts per pound; Sport aerobatic and fast flying scale models

110-130 watts per pound; advanced aerobatic and high-speed models

130-150 watts per pound; lightly loaded 3D models and ducted fans

150-200+ watts per pound; Unlimited performance 3D and aerobatic models

These guidelines are generally accepted but may vary depending on quality of motor and battery, type of motor and it’s relevant efficiency and prop size.

To enable successful electric flight you need to make informed decisions regarding the components to use, we can suggest a package of components. Please ring, e-mail

or follow our “How to select a motor….guide” on the help page.

To keep motor selection simple we have a range of IC equivalent outrunner motors with simple designations e.g. 600WATT 40 this means the nominal power of the motor is 600Watts and is equivalent to a 40 size IC

Developments in cell technology now provide us with batteries to supply the power to our motors which are lighter than a tank full of fuel! The electric motor is almost certainly lighter than the IC motor therefore the power system is probably lighter than an equivalent IC motor / tank / servo! Combine this advantage with lighter construction as there is no vibration to consider, when building the model and you will find that electric powered models will out perform IC models!

As with all model aircraft to achieve the best performance the airframe needs to be as light as possible. Just "think about adding lightness" whenever you are able to!