I am concerned because my 3-year-old son has started to stutter. Q: I am concerned because my 3-year-old son, who until recently had great language skills and talked really clearly, has started to stutter.
Intermitant motors should be replaced. From experience, relays and transformers rarely go out. It is usually the motor that burns out and it usually does so quickly when at life's end. Take the time to check all of your wire connections-hours can be spent diagnosing a vacuum only to find out it was a bad connection.ntermitant motors should be replaced. From experience, relays and transformers rarely go out. It is usually the motor that burns out and it usually does so quickly when at life's end. Take the time to check all of your wire connections-hours can be spent diagnosing a vacuum only to find out it was a bad connection.
Motors: main failure modes are failed bearings (seized) and broken wires. You occasionally see magnets coming loose, but that's rare. If you inspect your motors regularly, you will notice failing bearings long before they seize. It's very rare to have a multicopter fall out of the sky due to a motor failure. ESCs: if you use reasonable quality ESCs, and use them below 60% of their rated maximum, they basically don't fail. Props: they break, a lot.