![]() Consider spending a bit more for a name brand servo. Thus, before buying a 10 pieces MG90S servos lot for under $40. ![]() The largest problem people had with the TowerPro servos was that they centred poorly. TowerPro now suffers from very cheap knockoffs being sold on eBay and Amazon where they may be different from each other, order to order. These servos, once a staple on Banggood, aren’t offered by Banggood any longer. But, these servos were made in different factories and after a while people started to notice the quality went downhill. The TowerPro MG90S were the ‘go-to’ metal gear servo for a lot of pilots prior to 2020. Thus even cheap metal gear servos are a step up from their cheap plastic gear servo alternatives. Making metal gears in China is fairly cheap and thus you’ll find metal geared servos that are often in the same price range as plastic geared servos. The stripping of plastic gears is one of the most common failures of a servo. Metal gear servos, as the name implies, replaces most if not all the plastic gears with metal gears. Still, servos can change the flying dynamics of the plane, changing the feel and responsiveness of the plane. There are also strata between plastic geared servos with some being able to take a bit of abuse while others fail at the first bad launch. If your plane is one you fly rarely, and you’re not really pushing it that hard, the plastic geared servos can last sometimes years before failing if they fail at all. Usually the conversations come up when a servo dies and needs to be replaced. Up to this point a lot of pilots aren’t very concerned about servos. The topic of servos isn’t always the most exciting for pilots to talk about. As we’ll see later on, sometimes these plastic servos are okay for these light-weight models. This may be because the parts are smaller and more delicate. One thing that stands out is that the smaller the plane gets, the more likely it will come as PNP only. Now that we’re starting to see more planes designed for FPV. If at all possible, avoid the PNP planes, buy the kit version and do your research for viable parts. Thus, replacing the plastic servos that come with a plane is often a good thing to do while you add the INAV electronics to the plane. The extra electrical components added to INAV planes plus the often heavier batteries and the nearly constant use of servos in flight modes means that INAV servos are more prone to taking a beating. Where a model can often last for many years of service, with occasional repairs and part updates. INAV planes often see longer life cycles. The disposable nature of this segment of the RC hobby, the light nature of their planes, and the fact that plane models get new updates every few years, creating end of life scenarios for parts, means that the plastic gear servos in these planes often don’t get to the point of failure.
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