Robart incidence meter calibration

[Don McCullough]

The first thing I did after trying to use a Robart meter is toss out the 
meter part and keep the rest. I replaced the meter with a digital level. I 
used the MACKLANBURG-DUNCAN 92346 SMARTTOOL - MODULE ONLY. It is about $100 
but really takes the pain out of using the Robart.

Not only does the robart use a penny for a weight (too light), but it uses a 
simple nylon bearing. Between the stiff bearing and the weight rubbing 
against the case, I never could get anything approaching 1-degree accuracy. 
The digital level is dead accurate to 1/10th of a degree and is easily 
calibrated. It has a neat function, it will beep when it hits zero -- very 
handy. Next I want to toss out that short bar and replace it with a longer 
one.

Don

----Original Message Follows----
From: "Rick Kent" <knowhow3 at bellsouth.net>
Reply-To: discussion at nsrca.org
To: <discussion at nsrca.org>
Subject: Re: Robart incidence meter calibration
Date: Fri, 4 Feb 2005 15:33:37 -0500 (Eastern Standard Time)

Ever taken a Robart meter apart? I did once (forget why), and found that it
actually uses a US penny for the counterweight!
Interesting.

Rick

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

From: discussion at nsrca.org
Date: Friday, February 04, 2005 01:32:48 PM
To: discussion at nsrca.org
Subject: Re: Robart incidence meter calibration

Agree,
And would add, always set up the level with the same side forward.
If I swap my robart meter 180 degrees, it's off a bit.
Ron Lockhart

-------------- Original message --------------
I don't even try to use the bubble level. As long as you set the fuselage's
datum line to what the meter itself says is zero, you can make all your
other measurements relative to that reference. It then measures degrees + or
- from zero, not from level. Seems to work out OK for me. I do the same for
the GP laser incidence meter, which I find more accurate anyway.

Rick

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

From: discussion at nsrca.org
Date: Friday, February 04, 2005 09:59:33 AM
To: discussion at nsrca.org
Subject: Robart incidence meter calibration

Has any tried to calibrate their Robart incidence meter, or sent it back to
have it done? The bubble level appears accurate, but the meter is way off
from where the bubble syas is level. I've checked it against two other
levels, and the level bubble on the Robart meter is ok.

Thanks.



Jon A. Lowe
Deputy Project Manager
Close Combat Weapon Systems Project Office
jon.lowe at msl.army.mil
256-876-5185
DSN 746-5185

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