From www.youtube.com - January 12, 2017 6:37 PM
It is a very cool propeller.You can use it in your glider also.It definitely works.You can test it.................................! I've shown its workin

 

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https://gustmees.wordpress.com/?s=makered

 

http://www.scoop.it/t/21st-century-learning-and-teaching/?tag=Ideas+for+makerspaces