----- Original Message -----

From: Finn Lassen

To: Rotary motors in aircraft

Sent: Sunday, May 15, 2005 12:18 PM

Subject: [FlyRotary] Re: Prop balancing?

Do you think there would be a market for a $200 - $300 unit for homebuilts?

Finn

rijakits wrote:

I don't know about the old analog units, but the ones you can buy an airplane for it!

Web are using ACES products which a re considered half the price of a Chadwick. We use a 2020Turbo for the helicopters and it costs around $12.000.- with all the software for the helicopters.

They have cheaper version for simpler problems, like props.

Check their website: http://www.acessystems.com/

If for nothing else they have a interesting reading about balancing - go to "downloads"....

I know there are cheaper systems for the experimetal market out there, but I gues they are a little limited in certain aspects (I may wrong!!).

ACES is very easy to work with once you got through the manual (which is very easy too!)

Ask them to send you a test unit, if you like it they may sell it to you for a reduced price.

I am on good terms with them, if you want I can inquire about new, used, rental units......

This units can also be used for any and all kinds of balance - however if you are serious about your gyro, you want to be able to do that as well....

With some fixtures you should even be able to balance rotors and cranks dynamically!

Hell, you might make some extra bucks balancing all the props in your area! Once you areb set up you should be done with 3-4 engine runs.

 

 

Thomas J.

----- Original Message -----

From: Russell Duffy

To: Rotary motors in aircraft

Sent: Sunday, May 15, 2005 9:13 AM

Subject: [FlyRotary] Re: Prop balancing?

I'm not familiar with the Chadwick unit, but it probably operates on the same principle using a vibration sensor on the engine and an optical sensor to pick up reflective tape on one prop blade. No reason it shouldn't work.

 

Thanks for the info Perry.  The Chadwick was just as you describe,  a vibration/optical sensor that mounted to the redrive plate, and a piece of tape on the prop.  The guy who was running it admitted that it was probably something he just didn't know how to set.  The unit actually belongs to his son, but he's working two jobs, and I never see him anymore.  

 

At least it's good to know that it should probably work.  

 

BTW, does anyone have any idea how much these things cost?  I assume "a lot". 

 

Cheers,

Rusty