It would be good to have a database of location of where these blades are breaking. what is the air temp.. etc. Reason is that, I am sure the air temp has something to do with it failing sooner then others. I use to work in plastic injection molding.. temp has a lot to do with outcome.
Seems like it is a nice temp, since there are people outside.. strolling around.
Regards,
KS
I have only had problems with 2 10" props breaking. Never any problems with the 8" and I flew those 8" hard on my 450.DJI had a booth at IRCHA last weekend. I specifically asked about the prop issues. Their response focused on over tightening the prop nuts, using loctite, and there being thousands of units flying and a relatively few prop failures. They never mentioned new, improved, re-designed props. I foolishly purchased new DJI 10" props from Heli-Direct after three of those included in my kit failed. "...fool me once..." At least they were cheap. Six cost $12, the price of one Graupner. You get what you pay for, I guess. I now use Graupner 10 inch props. Just curious - do the DJI issues seem to be mostly with the 10 inch props or are the 8 inch versions equally suspect? There seem to be a few folks here having good luck with the 8 inch setup.
If DJI's assertions regarding loctite and over tightening are accurate one would think that the failures would not be depenbdent on prop length.
Jon
I think what were seeing here is the craft is made to be flown as is out of the box. then guys hang gopros, bigger packs, etc and it quickly over rates the props carrying ability. usually when something is under rated for it's use, it fails.
props are a consumable product, like brakes, windshield wipers, etc. sand, gravel, heck even cavitation wears them out. any little "touch" should be replaced, not just looked at. When people buy stuff that flies and uses propellers, you need to get extra. while there, get something better like apc, same price. APC has been around since i was a kid, never had one fail i didn't whack the ground with. I wonder how many guys have a slight mishap and whack a prop on the ground, but have a skid mark moment, "at least i didn't break a prop this time" only to loose it mid flight next time out.
I'll never buy anything less than graupners for stuff i want to film from, nothing else works
That's what I'm saying. In its stock form, the flamewheel's profile isn't much bigger than a frisbee. But these threads about crappy dji props are getting old, more props haven't broke then have. Whoever thinks they'll get away flying 500.00 dollars worth of weight under their 500.00 dollar MC on 2 dollar props is fooling themselves.
View attachment 7797The DJI props and the Xaircraft props are not the same. Here is an example. I just took this picture and on the left is the DJI prop, and the Xaircraft on the right, both are 10". The hub of the DJI prop is beefier and has thicker walls than the Xaircraft one. The height of the hubs is the same. I have had no problems with my DJI props on my F-550, but I have not flown more than 10 batteries thru it. I dont have a camera or anything, but the Traxxas 8.400 mah lipos I run are more than enough to make up for the weight of a camera and mount, the battery is huge and weighs over a pound. Still I dont hard *** it around either. But something is not right here. I asked Robert at DJIUSA about the props, and he told me that he has never once had a DJI prop break in flight. He also told me the original DJI props were replaced with this thicker walled prop. And last, he say's that for many many people out there, they just dont understand how to tighten these properly.
And that those who are constantly breaking props are over tightening them badly, and causing fractures in the hub. Those who have had prop failures because of this, think that they better tighten them up real good next time, and on and on. I get this, but as well there are a lot of guys out there who have been flying a long time, and in fact do have some grasp regarding how to properly tighten these bad boys, and still have had breaks. As mentioned by someone else, a LOT depends on how heavy your loaded and or how hard you push it that way while loaded.
just my 2 cents....Since in my company we deal with suppliers of injecton moulded parts, we know a little bit about it. All propellers are made on injection moulding machines, where the injection tool has to be heated very prcisely to a temperature matching the injected material. Also the granular has to be preheated to a specifc temperature. On a moulding tool you have at least 3 different inlets where the heated granular gets injected...in other words: three different strams of material will meet somwhere in that form to merge to one propeller. If, for any reasons, the parameters are not met (tool or granular not hot enough, tooling opens to soon ect...) you won't get one homogenic strem of material out of that form. With the free eye it looks like one propeller, but in reality its various pieces "glued" together. Almost always, if a propeller snaps in mid air, it's exactly at one of the "meeting points" of the moulding process. That's why this does not happen a lot with Graupner props 'cause they have the hell of a Quality Control, where QC doesn't mean looking at the finished prop if it looks good or not, but to have the production parameters documented and under control.
Chris