Blade runner 2

[brady_1993]

i have just bought my br2 and the ring on the blades vibrates a lot when in flight . The helicopter flies fine but is this a serious problem?? :confused:

[IIDX]

What do you mean the ring on the blades?

My BR2 had the two blades vibrate lots when I flew it until I did the spacer mod. I just cut the plastic tubing that is on top of the rotor shaft into 3 pieces. Put one just above the bottom rotor blade, then put the two black plastic tubes, then another piece of tubing and the top rotor blade and the final piece of tubing. This should space them out a bit more and the rotors won't vibrate and clash as much.

If this isn't waht you mean, then maybe explain it a bit more in detail. Sorry.

Also don't worry if the blades look like they are tilting or vibrating weird...that is how it goes. If you turn too sharp the rotors may clash but besides that it's not an issue. But you can also tighten the spacers onto the rotor blades to stop it from vibrating so much. Just fool around with it and try to find the best setup for the way you fly.

[Steve Shepard]

When doing the "spacerless spacer mod" you are supposed to toss the black spacer tubes away. That's why it's called the "spacerless spacer mod". Get it? SPACERLESS! Getting rid of the spacers eliminates the possibility of rotor clash and binding against each other, by spacing the rotors farther apart. By replacing the spacers, you are working just opposite of what it is you are trying to accomplish.

Everybody ~ make sure you read the directions about how to do a mod correctly, and make sure you understand what is going on, before you give out misinformation.

And for crying out loud, odd vibrations are NOT a normal part of the BR's operation. The vibration is usually caused by friction between the drive train parts, just as you describe! The only other possible cause is incorrect mesh of the drive gears.

It usually helps the machine run smoothly if you lube the moving parts. Search for "Bladerunner Proper Lubrication". I published complete, easy-to-read, instructions for the procedure. The search feature IS case sensitive.

Pay Attention!

Aloha, Steve

And guys, don't start giving out advice until you have read all the information available. If you have to ask questions yourself, you're not ready to start giving out advice to others! Sheesh!

[Bigga]

Hmm I'm not sure you have to know everything before you know something if you know what I mean! ;)

[brady_1993]

well i did the spacer mod and its still the same. The the ring that the blades connect to vibrate up and down and the blades are secure. i think something must be bent, i will just order new blades and see.

THANKS FOR YOUR IDEAS!!

[IIDX]

When doing the "spacerless spacer mod" you are supposed to toss the black spacer tubes away. That's why it's called the "spacerless spacer mod". Get it? SPACERLESS! Getting rid of the spacers eliminates the possibility of rotor clash and binding against each other, by spacing the rotors farther apart. By replacing the spacers, you are working just opposite of what it is you are trying to accomplish.

Everybody ~ make sure you read the directions about how to do a mod correctly, and make sure you understand what is going on, before you give out misinformation.

And for crying out loud, odd vibrations are NOT a normal part of the BR's operation. The vibration is usually caused by friction between the drive train parts, just as you describe! The only other possible cause is incorrect mesh of the drive gears.

It usually helps the machine run smoothly if you lube the moving parts. Search for "Bladerunner Proper Lubrication". I published complete, easy-to-read, instructions for the procedure. The search feature IS case sensitive.

Pay Attention!

Aloha, Steve

And guys, don't start giving out advice until you have read all the information available. If you have to ask questions yourself, you're not ready to start giving out advice to others! Sheesh!

I think I misunderstood his initial post, and you misunderstood my post.

I was not explainning how to do the spacerless spacer mod, I was explaining the spacer mod where you keep the black tubes. I understand the spacerless one now though and I'm going to try it today.

As for the vibrations...I guess I did misunderstood that. I thought you were just describing the normal rotor movement and occasional clash that I think is a normal part of operation for the BR2...I guess vibrating is something different.

[Steve Shepard]

There is no such mod as where you keep the spacers, unless you mean adding an additional spacer between, above, or below the plastic thingies. That mod has been superceded be the "spacerless mod". (big friction problems)) The whole idea of the mod is to get rid of excess weight, and to space the rotors farther apart, so as to increase the distance between the rotors. This will help eliminate rotor clash and ensuing wrecks.. The spacers are a good source of friction in the drivetrain, and in these tiny birds, every bit of friction increases wear and tear on the motors and batteries; thus the idea of eliminating the spacers.
It is normal for the rotors to sit at some angle or another, when at rest. When the plane is moving, the rotors have to assume different positions, because the system design is to correct any unstability in the attitude of the plane to the rotors, such as when you are attempting FF, RF, or turns. Petter's patent application says the plane is supposed to "be passively stable in hover". Any change from a stable hover, (hands off), and the rotor system automatically tries to return the machine to a "stable hover".
The fact that we can tweak the machine so as to allow some semblance of FF, is just a bonus. It just wasn't designed to "fly" like a conventional heli.

As far as vibration in the rotors, as I said earlier, there should be NO vibes going on. There are just so many things that can contribute to a vibration problem - one blade not set at the same pitch angle as all the others, an unseen break in the spokes, one blade is loose from the outer ring, improper balance, such as a repaired break where the opposite blade is not counterbalanced to the repaired one, stripped gears, an intermediate gear drilled off-center, misalignment of the gears, and so on, ad infinitum. If you can't find something wrong, (most problems stand out like a hippie in church), try another rotor and go from there. Still wobble and vibrate? Could be a bent mainshaft, or the wobble pins in the rotor hubs could be sticking (lube the machine).

Sorry about the misunderstanding, ***t happens, sometimes.

Hope this explanation helps get you on the right path ~

Aloha,
Steve