Originally Posted by cjcj1949
Brushless motors should only need the bearings changed. If you want a new one do you want something cheap or something powerful. You'll need a motor that says it is for a 450 and I expect you want to us 3S so you'll want a kv of around 4000. HobbyKing have a new range out that might be good. Lots available for around £10 from GiantShark. They all work well. 200W or 20 amps will work ok, but 400W is better if you want more power.
This was started about a year ago and then abandoned when I found most people were not interested in the technical side of things. I've been in RC for about 30 years, I'm a very average pilot, but I have a degree in Electronic Engineering. If anyone wants a blog expanded or a technical question answered I'll be happy to do so. I've had about 500 views so there are some people who are interested.
Most Battery Chargers are designed to work from car batteries, some have mains connections built in. The job of the charger is to put in as much charge as possible into the battery as quickly as the user wants. This is usually as quickly as possible.
Lipos can only be used a certain number of times.
Lipos are very easy to charge. They are usually charged at a constant current ( usually the current numerically equal to the 1 hour discharge capacity) until a certain voltage is reached (usually 4.2v per cell).
The charge process is commonly described as a constant current phase followed by a constant voltage phase. This sounds as if the charger has to make some sort of decision as when to change modes.
This is misleading as although it may seem like that the reality is