This is a quadcopter propeller with 10" length and 4.7 pitch
I found the model in following link. I adjusted its thickness to make it printable.
htt...p://grabcad.com/library/10x4-dot-7-propeller
I tested it with my quadcopter. But I do not advise using it. I do not accept any liability for any harm that may happen to you or your properties using this model.
I printed it using my delta 3d printer from GearBest.
If you also want to get a delta 3d printer, you can use special coupon code GBTE to get %12 discount on GearBest :