Hoverfly HoverflySPORT, User Manual, Page: 31 / 67

HoverflySPORT™ User’s Guide Page 31 of 67
respect the maximum discharge current the battery can handle safely. You should buy a watt meter and place it into your wiring harness
during testing (don’t leave it in place while flying since it will add weight). Measure the maximum current draw from your battery source while
the multi-rotor aircraft is mounted to a test bench. Make sure that you are not exceeding the manufacturer’s specifications.
The HoverflySPORT™ has on-board circuitry to monitor battery voltage. Future functionality may indicate to the pilot that the battery source
requires re-charging. A low-cost battery voltage alarm can be purchased and mounted permanently as part of your wiring harness. The
alarm will sound when you need to land immediately and re-charge. Drawing your battery below the safe cell voltage will limit its lifetime.
4.5.4 Electronic Speed Controllers (ESCs)
In this guide, we will limit the information provided to brushless-motors since the use of brushed motors is not commonly seen in recent times.
It should also be noted that brushed motors generate a large amount of Electro-Magnetic Pulse noise because of the arcing between the
brushes and the contacts on the rotor. Use of brushed motors has not been tested on the HoverflySPORT and it is recommended that the
user NOT use them.
An Electronic Speed Control or Electronic Speed Controller (ESC) is an electronic circuit that has two primary functions. First, the ESC
regulates the battery source down to the voltage needed by servos and the RC receiver. Second, the ESC converts the signals from the RC
receiver to a brushless motor control output. The regulation is used by your receiver and but is not used by the HoverflySPORT™. In fact
there is no circuit connection between this regulated voltage and the main processing electronics on the HoverflySPORT™. This is why a
separate connection from the battery to the Power input on the HoverflySPORT™ is required (more on this in following sections).
Danger: Use extreme care when using LiPo batteries they can be extremely
dangerous under certain conditions and when damaged.