Prop Balancing !
- Thread starter Bigvern
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Sure is a loaded topic lol !!!! have to be careful how you answer! anyhow the one from muscleflex is 5 7/8 and works great. I am sure if you asked he would cut one a bit longer.Scottrod said:
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The balancing rod I got from [email protected] works great. I just finished balancing both phantom 1 & 2 props yesterday. check out my review http://www.youtube.com/watch?v=Yv1HoCnKGBA I am using the Dubro balancer.
mediaguru said:
Mine seems to work fine. I'll set it up later on and test a bunch of props, take it apart and test them again... But, you're right. I wish it were longer...
-slinger
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What is the length of the one you have? The one I got from muscleflex is 5 7/8 inches or 14.9225cm again you can see it being used on the Du-Bro balancer http://www.youtube.com/watch?v=Yv1HoCnKGBA
mediaguru said:
Okay... I just retested the Dubro using the Atlanta hobby prop balancing rods and it still works fine. How is yours set up?
This is mine. I also made sure the rod was level between the front and back blocks of the Dubro...
-slinger
funtimegrandpa said:
The Atlanta Hobby roads are 3.5" long. There are two of them, one CW and one CCW...
-slinger
gunslinger said:mediaguru said:
Okay... I just retested the Dubro using the Atlanta hobby prop balancing rods and it still works fine. How is yours set up?
This is mine. I also made sure the rod was level between the front and back blocks of the Dubro...
-slinger
Yup that's the same way I've got it setup. It just stops when it stops. Different place every time. Maybe I should make a video to demonstrate.
mediaguru said:
Crap... Now you've got me paranoid. I'm going to check mine again tomorrow. If you're having a problem with them it'd be great if you could share a video... :shock: :shock: :shock:
Thanks...
-slinger
Is it possible your props are already fairly well balanced. After all, people are finding that not all DJI props are in need of balancing. On average it seems that somewhere between 25% and 33% are good enough as shipped. :?mediaguru said:
Assuming your setup is the same as gunslingers, and that there's nothing preventing your balancer rotating freely, then stopping at different positions every time is the sign of a well balanced prop. It's stopping in the same position each time that shows an out-of-balance situation
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I agree completely, that if a Prop is very well balanced it will not move no matter what position it is at. If it is out of balance one side will always drop down. There is also a chance a prop is perfect form the factory, but I would say at least 40% are not. Last night I opened a new set of phantom 1 props, two were good enough to put on but the other two took a good amount of sanding.
The other thing I don't believe people understand is that even if you have a perfectly balanced prop which is what you need, the prop could be bent, and not matching correctly on both ends. I show how I have tested this about 1/2 way through my video review: http://www.youtube.com/watch?v=Yv1HoCnKGBA I am going to make another video later this week with an even more exact way of making sure they are exactly matched. Trust me even a perfectly balanced prop will shake if both tips do not match when the reach the same spot.
Grandpa Jake
The other thing I don't believe people understand is that even if you have a perfectly balanced prop which is what you need, the prop could be bent, and not matching correctly on both ends. I show how I have tested this about 1/2 way through my video review: http://www.youtube.com/watch?v=Yv1HoCnKGBA I am going to make another video later this week with an even more exact way of making sure they are exactly matched. Trust me even a perfectly balanced prop will shake if both tips do not match when the reach the same spot.
Grandpa Jake
So it has been my interpretation that a balanced prop would finish in a horizontal position, or very close to it. If you are saying the props finishing in inconsistent positions means they are balanced, then maybe the bar is working. I'd have to mess with it more I suppose.
mediaguru said:
Yeah, it's really short and hard to use because of its length. It doesn't seem to balance well. Not getting consistent results.
I end up using the rod from du bro. The plastic stopper is just to fit into Phantom prop. I'll see if I can get some pictures.
Well, I said between 25% and 33% come acceptably balanced. Funtimegrandpa is putting the figure somewhat higher at 60% but either way it shows some are OK. Perhaps you just lucked out - someone's got to :lol:mediaguru said:
Anyway, put a mark on just one blade, and try your balance. If that blade is consistently finishing in the lower half on the circle, even if in different positions, you still have work to do. On the other hand, if it finishes sometimes up, sometimes down - then as we say in Scotland - "You've won a watch" i.e. you're finished
As it happens, finishing roughly horizontal (and with the marked blade on the same side each time) would tell you the hub is heavy on one side. As funtime agrees, the blades don't have to be horizontal to indicate balance. The rod is your pivot point so the weight each side will be the same when balanced regardless of finishing position. Unless you're using 3-blade props, of course, as per my avatar :roll:
madbugger said:Well, I said between 25% and 33% come acceptably balanced. Funtimegrandpa is putting the figure somewhat higher at 60% but either way it shows some are OK. Perhaps you just lucked out - someone's got to :lol:mediaguru said:
Anyway, put a mark on just one blade, and try your balance. If that blade is consistently finishing in the lower half on the circle, even if in different positions, you still have work to do. On the other hand, if it finishes sometimes up, sometimes down - then as we say in Scotland - "You've won a watch" i.e. you're finished
As it happens, finishing roughly horizontal (and with the marked blade on the same side each time) would tell you the hub is heavy on one side. As funtime agrees, the blades don't have to be horizontal to indicate balance. The rod is your pivot point so the weight each side will be the same when balanced regardless of finishing position. Unless you're using 3-blade props, of course, as per my avatar :roll:
Many thanks for the lesson. Tonight I'll check them again, but it seems that at least my two black capped blades must already be in balance, or close then.
I should have said... "that blade is consistently finishing in the lower half or upper half of the circle, even if in different positions," ...since you would only be marking one blade and it might be the lighter one. But you got the idea.mediaguru said:
Like I said, someone always needs to be lucky and this time it looks like you won the prize.
Just let me know if you ever decide to put a bet on a horse, 'cos I'll back the same one as you.
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Never really thought about the 3 bladed props, how do you manage that? I don't have them yet, but one day and then I will know lol !!!
I swear, those balance bars remind me of those flying stick toys
http://sci-toys.com/scitoys/scitoys/aer ... _start.jpg
I almost want to find one, break off the stick and jam it in the prop lol
http://sci-toys.com/scitoys/scitoys/aer ... _start.jpg
I almost want to find one, break off the stick and jam it in the prop lol
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