Building Lasers Not??

[Jeff Hughes]

There are other inaccuracies in building that we cannot really address: slight wing to wing area differences, leading edge variations, trailing edge differences, different swell rates of the balsa sheeting used,  etc. We are building with foam, balsa wood and fiberglass,  none of these are known for their stability. You can beat one area to death like incidence, but have no control over some of the others, so I'm with Ron, get it close, and trim till you like it. 
Jeff

  ----- Original Message ----- 
  From: ronlock 
  To: discussion at nsrca.org 
  Sent: Sunday, October 24, 2004 5:25 PM
  Subject: Re: Building Lasers Not??


  Lets remind potential new pattern pilots reading this list,  that there are a lot of good flying
  birds out there that were set up by eyeball and rulers.   With a bit of trmming, they fly
  fine and can be competitive.

  Later, Ron Lockhart
    ----- Original Message ----- 
    From: Bob Pastorello 
    To: discussion at nsrca.org 
    Sent: Sunday, October 24, 2004 8:35 AM
    Subject: Re: Building Lasers


    .1 degree is also just a shade over 1/32" difference EACH at the leading and trailing edges.  Understand that we need those kind of accuracies for best, but I believe most folks do NOT resolve incidence to 1/32"....but I understand the need to state precisely.

    Bob Pastorello
    rcaerobob at cox.net
    www.rcaerobats.net


      ----- Original Message ----- 
      From: Karl G. Mueller 
      To: discussion at nsrca.org 
      Sent: Saturday, October 23, 2004 10:06 PM
      Subject: Re: Building Lasers


      Bob,

      A tolerance of .1degrees is not very close to set the incidence.
      Over a wing root of 20" it works out to be .035 inch. This is the max.
      positive incidence I use on the wing when setting up a pattern plane 
      with the stab being set to zero.  A  .1 degree tolerance could give me 
      a setting between 0 and .070 positive when setting up a wing with 
      a 20" root.

      Karl G. Mueller
      kgamueller at rogers.com


        ----- Original Message ----- 
        From: Bob Pastorello 
        To: discussion at nsrca.org 
        Sent: Saturday, October 23, 2004 9:23 PM
        Subject: Re: Building Lasers


        The purpose of the ones I have is not to check incidence, but to verify alignment "square", and "parallel"...currently, a lot of folks use different methods, some height gauges, some fixtures.  When building a plane, I have always struggled with getting the stab square to the fin, and then the wing parallel to the stab...and these differences sure do make a difference in how a bird trims out.

        Incidence is checked with our electronic digital levels, at .1 degree accuracy :-)

        Bob Pastorello
        rcaerobob at cox.net
        www.rcaerobats.net


          ----- Original Message ----- 
          From: Evan H. Dygert 
          To: discussion at nsrca.org 
          Sent: Saturday, October 23, 2004 8:14 PM
          Subject: Re: Building Lasers


          This discussion is getting a little too technical. 
          Seriously though, being new to a lot of this, I would be 
          interested in more details about how to use these laser 
          thingys to check incidence. I am completely new to 
          incidence checking so this probably sounds like a stupid 
          request.

          On Sat, 23 Oct 2004 18:37:53 -0500
            "Bob Pastorello" <rcaerobob at cox.net> wrote:
          >Nope.  They're yellow, about 8" long, 3/4" thick, 2" 
          >tall.  Has a bubble level included that has an LED for 
          >use in dark, and the case has magnets built into the 
          >base.  They were in the tool aisle right by the rest of 
          >the laser thingys.
          >
          >Bob Pastorello
          >rcaerobob at cox.net
          >www.rcaerobats.net
          >
          >
          >  ----- Original Message ----- 
          >  From: Wayne Galligan 
          >  To: discussion at nsrca.org 
          >  Sent: Saturday, October 23, 2004 12:10 PM
          >  Subject: Re: [SPAM] Re: Building Lasers
          >
          >
          >  Bob,
          >
          >  Does this laser thingy have a couple of pins that push 
          >out to like secure it to a wall?   I got one of these for 
          >a gift and was wonderin if it was the same thingy or not. 
          >  Mine is about 3" high x 4" long x 1" wide.  
          >
          >  WG
          >
          >    ----- Original Message ----- 
          >    From: User211991 at aol.com 
          >    To: discussion at nsrca.org 
          >    Sent: Saturday, October 23, 2004 12:02 PM
          >    Subject: [SPAM] Re: Building Lasers
          >
          >
          >    Great idea Bob.. have a P/N or name on these gizmos ? 
          >Where in Wally World were they located ?
          >
          >    Brian 

          Evan H. Dygert
          Dygert Consulting, Inc.
          364 Twelve Oaks Dr.
          Winter Springs, FL 32708
          Tel: 407-739-8194
          Email: evand at dygertconsulting.com
          =====================================
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