Yo Tempqa As you can see in the video, my test stand is solid - non moving so no thrust measurement which, really tells you little as static thrust (on the ground) bears no relationship at all to the thrust on the air as there are so many variables such as the type of model. No best propeller - all the propellers I used are listed above and, again, it depends on the model as to what propeller you use. If you want speed you use a large pitch, small diameter propeller. For pulling lower (large model at scale speed as an example) you use a large diameter, small pitch propeller. Buy the engine for yourself, you will enjoy it. Regards Brain Oily