Robart incidence meter calibration

[Bob Pastorello]

That's the one, Don.  Had mine for YEARS, pictured/explained on my Hints page....throw out the Robart, and spend the money.  Although many may say a tenth of a degree is not fine enough resolution, I just shoot for "zero", since it can be so easily calibrated with each use.

Bob Pastorello
NSRCA 199  AMA 46373
rcaerobob at cox.net
www.rcaerobats.net


  ----- Original Message ----- 
  From: Don McCullough 
  To: discussion at nsrca.org 
  Sent: Friday, February 04, 2005 8:03 PM
  Subject: Re: Robart incidence meter calibration


  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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