My Motor is not working correctly

[Matthew Sanchez]

I have a brushless motor that i bought from Hobby king and for some reason when it doesnt have a propeller on it The motor spins perfectly. But as soon as i place a propeller on it and tighten it on it struggles. I have a video of both with and without propellers if anyone can help me out that would be fantastic. Its a project for my final at my school and really need to get this thing in the error and we have had so many problems.

Here is the video without Propeller

Here is the video with propeller

Here is the type of motor im using
http://www.hobbyking.com/hobbyking/...use_.html?strSearch=NTM Prop Drive 28-26 1100

Here is the ESC im using
http://www.hobbyking.com/hobbyking/store/__15205__Hobby_King_30A_ESC_3A_UBEC.html

The main board im using is an Arducopter APM 2.6 with a 6 channel remote controller

 

[holtneil]

Hi mate that is a strange one have you tried it on another ESC to see what the motor does