Its all quite confusing to me, I wish their was a website or something that told all about it.

The motor I ordered (T-370) GP says this about it "Larger diameter winds with fewer turns produce considerable torque for powering small electric R/C planes and medium-size park flyers." The can is .96"diameter and is 1.2"s long.

A great planes speed 280 (t-280 or s-280 for the ball bearing version) GP says this, "Both of these 280-size motors are designed for park flyers, or other airplanes that require a 280-size motor. The S-280 is great for stronger climbs and longer flights, while the T-280 provides the muscle needed for aerobatic applications." The can size is .94"s diameter (.2"s difference from the 370) but is about a hlaf inch longer than a 370.

For GWS motors I found that a 300, 300h, and 350 are all physically the same size but have different kv ratings (300h having the lowest and 350 the highest), and are apperently physically the same size as a 370 motor.

Maybe the number just refers to the can size? For example anything the 100's is physicaly the same size, anything in the 200's is the same size, anything in the 300's the same size, etc.

Maybe somone else can shed some light on the topic?