Incidence meters

[Kenneth Blackwell]

Paul,

The line that you mentioned is the "zero thrust line" and it is determined
by the designer when the airplane is laid out. If you are starting with a
kit, the kit manufacturer should provide information that will allow you to
set up the incidences corectly. Sometimes this is accomplished by specifying
how to set the fuselage up on a flat surface, by blocking up the tail a
specified amount. Then, you can measure up from that flat surface to the LE
and TE....and calculate the incidence angle with trig....etc. etc. Another
way that manufacturers specify the incidences is by scribe lines or mold
lines on the sides of the fuselage.

In the end, the most accurate way to determine incidences is by measuring
LE/TE from a good flat surface....as Jerry Budd has already stated earlier.
We need to be able to set incidences to an accuracy of about 0.1 deg and
this just isn't possible with any of the devices mentioned...so far.

Cheers,

Ken Blackwell

----- Original Message -----
From: "Paul Lawrence" <pwl45 at yahoo.com>
To: <discussion at nsrca.org>
Sent: Wednesday, May 21, 2003 7:56 AM
Subject: Re: Incidence meters


> Speaking of incidence, what is the best way to find the thrust line for
> measuring the incidence?
>
> ----- Original Message -----
> From: "David Wartel" <dwartel at attbi.com>
> To: <discussion at nsrca.org>
> Sent: Tuesday, May 20, 2003 11:23 PM
> Subject: Re: Incidence meters
>
>
> > The book, "Building a Pattern Airplane" has a how-to on building a very
> > accurate incidence meter from a digital level and parts from a Robart
> > incidence meter. I obtained a digital level at a reasonable price on
> E-bay.
> >
> > Here's the link to where you can buy the book, which is excellent.
> >
> > http://www.ranchcreek.com/airplane/default.htm
> >
> > Dave
> >
> >
> > ----- Original Message -----
> > From: "Ron Van Putte" <vanputte at nuc.net>
> > To: <discussion at nsrca.org>
> > Sent: Tuesday, May 20, 2003 11:11 PM
> > Subject: Re: Incidence meters
> >
> >
> > >
> > >
> > > ORLANDO FRETS wrote:
> > >
> > > >I'm looking to buy an incidence meter. Can anyone shed some
experience
> > with the Great Plane laser and the Robart type. Which is a good
> > recommendation?
> > > >
> > > >
> > > >
> > >
> > > Get Jerry Budd's laser meter.  It's not cheap, but is very good.
> > >
> > > Ron Van Putte
> > >
> > >
> > > =====================================
> > > # To be removed from this list, send a message to
> > > # discussion-request at nsrca.org
> > > # and put leave discussion on the first line of the body.
> > > #
> > >
> >
> > =====================================
> > # To be removed from this list, send a message to
> > # discussion-request at nsrca.org
> > # and put leave discussion on the first line of the body.
> > #
>
> =====================================
> # To be removed from this list, send a message to
> # discussion-request at nsrca.org
> # and put leave discussion on the first line of the body.
> #
>

=====================================
# To be removed from this list, send a message to 
# discussion-request at nsrca.org
# and put leave discussion on the first line of the body.
#