[NSRCA-discussion] Incedence meters alternative

Sun Dec 17 02:56:12 AKST 2006

Never having owned an incidence meter, that's pretty much my procedure as
well Lance.  A 1/2 degree positive pitch on the 18" wing means the L/E cord
center line needs to be 4mm higher than the T/E cord center line.  This is
real easy to lay out with just a root rib pivoting on the wing tube.

I'll do one wing using the 4mm number, and then match the second wing by
measuring the T/E height off the table.  Once done, I'll check the incidence
using the top wing shucks.  With the shucks in place and a small bubble
level on each shuck, elevate the tail until the 'master' wing reads level
and then match the other side.     

(I just happen to be at this step this weekend with my current project!)

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Lance Van
Nostrand
Sent: Saturday, December 16, 2006 7:03 PM
To: NSRCA Mailing List
Subject: [NSRCA-discussion] Incedence meters alternative

I got out of this game a few years ago.  Fact is, a height gage, if 
measuring off a flat surface used at the LE and TE is way more accurate than

the meters. It is quite easy to accurately measure the height off a table to

less than 1/32".  On a 18" chord that's 0.1 degrees worst case.  I think I 
can do better than 1/32".  The key is having a flat table (not necessarily 
level).  You may not realize this, but what they call "silestone" is a 
manufactured granite that is pressed in molds.  It's something like 99% 
quartz and some epoxy binder.  It's redeeming feature is that its flatness 
is part of its specification and is molded in.  Unlike real granite that 
must be polished with large wheels and they never give an optically flat 
surface.  Silestone has actual specifications.  I have a table top that is 
accurate to 10 mils anywhere.  Way good enough for our hobby.  By purchasing

from a stone cutter a piece that has a chip in it, I was able to cover my 
work table for $80.

Another nice thing about this investment is that this artificial stone is 
nonporous, which means that CA and epoxy don't really stick.  They can 
easily be scraped off with a razor.  I've even spray painted without a 
dropcloth and just scraped off the overspray from the table.

I realize this is probably a whole new alternative but I thought some might 
be interested.

--Lance

----- Original Message ----- 
From: "MKMSG" <mkmsg at cox.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Saturday, December 16, 2006 11:49 AM
Subject: Re: [NSRCA-discussion] Incedence meters

>I agree with Stuart.  My Hangar 9 incidence meter was worthless....plastic
> parts were a terrible fit and the meter gave very inconsistent results.  I
> couldn't believe they put that on the market!
>
> Mike Moritko
> ----- Original Message ----- 
> From: "Dennis" <patternpilot at verizon.net>
> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> Sent: Saturday, December 16, 2006 10:42 AM
> Subject: Re: [NSRCA-discussion] Incedence meters
>
>
>>I also have both meters. I found the AccuPoint, as are most things that
>>rely
>> on gravity to be virtually worthless. Too much friction at the pivot
>> points.
>> I also found the Angle Pro to have a loose, sloppy fit on the plastic
>> parts
>> and as well useless. I guess you could glue it on but then it could not 
>> be
>> used for anything else.  I did not find a problem with the meter having
>> repeatability problems. I use the smart level as well and have had great
>> results. I made my own mount using the ends from an old Robart meter and
>> an
>> old wing tube and socket. The build article was in the K-Factor several
>> years ago by Rick Allison I believe. If you are going to buy a pre made
>> incidence meter then I believe you get what you pay for. Spend the money
>> on
>> the good one.  By the way a smart level module (not sure if they are
>> available anymore) cost over $100.00. They can be recalibrated and work 
>> in
>> any orientation, even upside down as the display flips over so you can
>> read
>> it.
>>
>> Dennis
>>
>> -----Original Message-----
>> From: nsrca-discussion-bounces at lists.nsrca.org
>> [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Stuart 
>> Chale
>> Sent: Saturday, December 16, 2006 8:17 AM
>> To: 'NSRCA Mailing List'
>> Subject: Re: [NSRCA-discussion] Incedence meters
>>
>> Adam
>> Maybe I had one from a bad batch.  I remember doing a google search and
>> reading similar complaints.
>> Can you wiggle the meter on the mounting bar or have they improved the
>> plastic to plastic fit as well.
>> Stuart
>>
>> -----Original Message-----
>> From: nsrca-discussion-bounces at lists.nsrca.org
>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Adam Glatt
>> Sent: Saturday, December 16, 2006 11:08 AM
>> To: NSRCA Mailing List
>> Subject: Re: [NSRCA-discussion] Incedence meters
>>
>> Stuart, yours is definitely defective.  I just did the same test with
>> mine, and it outputs the same value regardless of how it approaches the
>> final orientation.
>> -Adam
>>
>> Stuart Chale wrote:
>>>
>>>
>>>
>>>
>>> This is the setup I use.  I have 2 short and 2 long bars.
>>>
>>> As a side note you can purchase the bars and plastic ends without the
>>> meter direct from Robart.
>>>
>>>
>>>
>>> The 2 pictures below are the hanger 9 meter portion placed on the same
>>> line on my workbench after tilting opposite ways first.  As you can
>>> see there is a big difference.  If you always go from the same
>>> direction there is more repeatability.
>>>
>>>
>>>
>>> The expensive high quality angle meter is
>>> http://www.aeroperfect.com/index.html
>>>
>>>
>>>
>>> Stuart
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: nsrca-discussion-bounces at lists.nsrca.org
>>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John
>>> Konneker
>>> Sent: Saturday, December 16, 2006 10:01 AM
>>> To: nsrca-discussion at lists.nsrca.org
>>> Subject: [NSRCA-discussion] Incedence meters
>>>
>>>
>>>
>>> Over the winter building season I will need to buy an incedence meter.
>>>
>>> Can anyone recommend one of the following or...?
>>>
>>>
>>>
>>> http://www2.towerhobbies.com/cgi-bin/wti0001p?&W=000727475&I=LXPW71&P=K
>>>
>>>
>>>
>>> http://www.horizonhobby.com/Products/Default.aspx?ProdID=HAN192
>>>
>>>
>>>
>>> Thanks!
>>>
>>> JLK
>>>
>>>
>>>
>>> _________________________________________________________________
>>>
>>> WIN up to $10,000 in cash or prizes  enter the Microsoft Office Live
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