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Main Discussion > do any of you guys know how to balance 325 V blades?
 
 
hotshot tony
Senior Heliman
Location: Shepherdsville, KY US

I'm looking to see if any of you guys know how to balance 325 v blades
singles from crashes. I'm just going to use them for autos in the 450 t rex. some good info on this would be nice, or somebody that might want to do them for a fair fee, let me know please.
Tony
06-09-2008 07:36 AM
 
 
Drunk Monk
rrProfessor
Location: Preston, UK

I have a habbit of using odd blades and what I do is make sure they are the same weight, within a gram or 2 or I don't use them together. Then stick a bolt through the blade holes and bolt the blades together, one blade pointing one way and one the other. Then balance the bolt on two cans of something so the blades can pivot to see how they balance and apply a little bit of tape (tracking tape or even sellotape works on small blades ) somewhere along the blades until the blades don't swing one way or the other.

There are other checks you can do on bigger blades but I've never bothered and there is really no need on the smaller blades. The main thing is to make sure the blades are the same weight to start with.

Hope that helps


Stephen

I only open my mouth to change feet.....
06-09-2008 10:24 AM
 
 
kingair
Key Veteran
Location: Utah - USA

Here's a great thread I found on balancing blades.

http://www.runryder.com/helicopter/t352560p1/

There is a very fine line between "hobby" and "mental illness."
06-09-2008 03:08 PM
HOMEPAGE  
 
 
Pistol_Pete
Elite Veteran
Location: Tampa Bay non-Buccaneer

Quote 
I'm looking to see if any of you guys know how to balance 325 v blades singles from crashes. I'm just going to use them for autos in the 450 t rex. some good info on this would be nice, or somebody that might want to do them for a fair fee, let me know please.

my advise is to try and match them for weigth FIRST...then balance.

<><>...the lunatic is in my head...<><>
06-09-2008 04:19 PM
HOMEPAGE  
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

Here we go again . . . . .

You DON'T need to balance the weights !

Balance the moments, that's all you need.
That's how they do the full size ones.
Why be more complicated than that ? ?

Bolt two blades together and balance on the bolt.
Weight the light blade tip to balance and you're done.

But if you still want to make life more complicated than it needs to be, knock yourself out
06-09-2008 05:16 PM
HOMEPAGE  
 
 
FBoss
Key Veteran
Location: Aurora Indiana USA

FYI AirWolfRC had a very extensive thread on this subject. Alot of effort was allpied by many people. The long and short of it is, he is correct and nobody (from that thread) came to any other conclusion. It was a hot one too!

The good ole times are now ,000132
06-09-2008 05:42 PM
 
 
kingair
Key Veteran
Location: Utah - USA

I read though the whole thread and it doesn't appear to me that the thread shows he's correct. To each his own. Looks like a typical RR thread where everybody tries to convince everybody else that they're right with no final conclusion. It's a pretty entertaining read actually, here's the thread.

http://www.runryder.com/helicopter/t385152p1/

There is a very fine line between "hobby" and "mental illness."
06-09-2008 06:06 PM
HOMEPAGE  
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

I'm not saying that making the blades weigh the same is wrong.
- - - That method will work.

I AM saying that method is unnecessarily complex for NO GAIN in performance.

And I'm always for simple.
06-09-2008 06:09 PM
HOMEPAGE  
 
 
FBoss
Key Veteran
Location: Aurora Indiana USA

OK Im not going to read it again but if memory serves there were more than a few who bothered to do it both ways and all came back with, the simple way works. Didnt feel right to me but I did it both ways and saw no differance. well thas not true, one way gets you to the flight line faster. Its all good though.

The good ole times are now ,000132
06-09-2008 06:15 PM
 
 
Drunk Monk
rrProfessor
Location: Preston, UK

Picking blades the same weight is hardling making it more complex


Stephen

I only open my mouth to change feet.....
06-09-2008 06:19 PM
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

ANY extra step that is not helping the end result is a waste of time.


Now if humoring yourself with unnecessary extra steps is your idea of fun, then knock yourself out.
06-09-2008 06:21 PM
HOMEPAGE  
 
 
FBoss
Key Veteran
Location: Aurora Indiana USA

You are right DM but if you feel like they HAVE to be the same then it could stop you from flying

The good ole times are now ,000132
06-09-2008 06:31 PM
 
 
Drunk Monk
rrProfessor
Location: Preston, UK

In my original post I said to make sure they are within couple grams difference.

From what your saying is it doesnt make any difference if one blade is 180g and other is 200g, your deluding yourself if you think that is correct.


Stephen

I only open my mouth to change feet.....
06-09-2008 06:44 PM
 
 
FBoss
Key Veteran
Location: Aurora Indiana USA

Lets be reasonable!! I agree with you. w/i a coupla grams

The good ole times are now ,000132
06-09-2008 06:52 PM
 
 
AirWolfRCrrProfessor - Location: 42½ N, 83½ W -
Quote 
From what your saying is it doesnt make any difference if one blade is 180g and other is 200g,
That's exactly what I'm saying. - - - Here's an example,
06-09-2008 06:53 PM
HOMEPAGE  
 
 
FBoss
Key Veteran
Location: Aurora Indiana USA

I do on occasion, delude myself, as we have drug testing here at work!!

The good ole times are now ,000132
06-09-2008 06:53 PM
 
 
kingair
Key Veteran
Location: Utah - USA

airwolfrc, I know you like to bust that picture out as a defense from time to time so you must know the details on the setup. I mean lets face it, that picture is useless without some specs. What is the weight of the blade and the weight of the counter weight? Also, is the CG of the blade in the same position as the CG of the counter weight? I'm probably wrong here but my guess is the blade and the counterweight weigh the same and cg's match.

Since you put this quote on your reply:
Quote 
From what your saying is it doesnt make any difference if one blade is 180g and other is 200g,

are you trying to say you know the blade and counterweight aren't matched exactly?

There is a very fine line between "hobby" and "mental illness."
06-09-2008 07:11 PM
HOMEPAGE  
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

It's not a defense. Simply a statement of facts.

If you don't believe me, try it yourself instead of trying to make me do your homework for you.
06-09-2008 07:13 PM
HOMEPAGE  
 
 
Drunk Monk
rrProfessor
Location: Preston, UK

and you reckon they just stuck that weight on there and threw it in the air?

The guy asked for advice and I told him what I do. Whether you agree or disagree is completely irrelavant to me. I forgot your always right


Stephen

I only open my mouth to change feet.....
06-09-2008 07:13 PM
 
 
fiveoboy01
Veteran
Location: Waunakee, WI - USA

Quote 
Bolt two blades together and balance on the bolt.
Weight the light blade tip to balance and you're done.

Question...

You say bolt them together at the bolt holes.

To use that method properly would you need to space the bolt holes a distance apart equal to what they would be at when mounted on the rotorhead?

Trex 450SA blinged, Trex 600N, DX7
06-09-2008 07:16 PM
 
 
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