Tutorial on electric power systems needed
I am going to be making a decision regarding what my first glider purchase should be. While your suggestions are appreciated, I have a pretty good idea it will be an Oly II from Skybench.
Anyway, here is my dilemma. I'd like to power it with a brushless motor, and have read a lot of threads on the motors that people choose to power their 2m and larger sailplanes. But the motors have those crazy number designations, none of which I understand except for the Electrifly motors. I've seen Axi, Himax, etc, but don't understand how the particular motors were chosen.
I know that Electrifly has a motor calculator on the site, but there is no "glider" option. So, I just choose "trainer" and get a small propeller recommendation, smaller than the ones I see listed in many of these threads. For example, Electrifly recommends something with a 10" or 11" prop, whereas I have seen people use up to 16" prop on their 100" span sailplanes.
So, here are my questions:
1. How do you figure out which motor you will use? I am sure you take into account the glider weight, etc, but I don't know any good sites to look at other than Electrifly.
2. How do you figure out what prop size and pitch to use? As I said, the Electrifly calculator lists small prop sizes.
3. Where do you get your folding props?? At Hobby Lobby they are out of stock, Tower has just a few to choose from, etc.