27-05-2014, 10:55 PM
Did a bit more work on the RareBears this evening. A 3rd one turned up so now I've got 3 to put together. 
Smuzz I owe you one !!
I took the 3 motors apart to pot the windings. This makes the motors run much more quietly. I guess it stops the windings from vibrating as much as they normally do, after all they have quite powerful and rapidly changing magnetic fields in those motors when they are going full peg. I have noticed that once you do this, the motors last almost indefinitely and I think it makes them go a just a little bit better as well. All that energy that was used for making noise has to go somewhere hopefully some of it goes into thrust.
It's good when they are a little quieter too, people thing they are going slower than they actually are, which can be a bit of a surprise and it makes you look good when you get a decent time with a plane that sounds a bit slower than all the rest
I just use 5 min or 15 min epoxy and put it on the most accessible end first. being careful no to get it on the laminations. It can easily be removed if a little bit gets on there so it's not the end of the world if some does.
One thing I did notice was, when I removed the motors, from their mounts, was that almost every screw was loose. Even if you didn't remove the motors for some attention you'd want to check that the screws were snug, these ones were not !!
My previous two rare bears flew pretty well with this set up and I raced and practiced a lot, for more than a year and a half with the same two motors, once I potted them they just seemed to last.
once the epoxy on this side is cured I'll turn them over and do the other end
Before Potting the first end
The first end is done
Smuzz I owe you one !!I took the 3 motors apart to pot the windings. This makes the motors run much more quietly. I guess it stops the windings from vibrating as much as they normally do, after all they have quite powerful and rapidly changing magnetic fields in those motors when they are going full peg. I have noticed that once you do this, the motors last almost indefinitely and I think it makes them go a just a little bit better as well. All that energy that was used for making noise has to go somewhere hopefully some of it goes into thrust.
It's good when they are a little quieter too, people thing they are going slower than they actually are, which can be a bit of a surprise and it makes you look good when you get a decent time with a plane that sounds a bit slower than all the rest
I just use 5 min or 15 min epoxy and put it on the most accessible end first. being careful no to get it on the laminations. It can easily be removed if a little bit gets on there so it's not the end of the world if some does.
One thing I did notice was, when I removed the motors, from their mounts, was that almost every screw was loose. Even if you didn't remove the motors for some attention you'd want to check that the screws were snug, these ones were not !!
My previous two rare bears flew pretty well with this set up and I raced and practiced a lot, for more than a year and a half with the same two motors, once I potted them they just seemed to last.
once the epoxy on this side is cured I'll turn them over and do the other end
Before Potting the first end
The first end is done
“The knack of flying is learning how to throw your machine at the ground and miss.”
"When once you have tasted flight, you will forever walk the earth with your thoughts turned skyward, for there you have been, and there you will always long to return." ~Leonardo Da Vinci