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01-31-2008, 11:54 PM
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Join Date: Dec 2006
Location: Calgary, Alberta
Posts: 45
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Flap position sensor
Any ideas on how to attach the Ray Allen POS-12 Position sensor to the flap control arm? This is being installed to connect to an Advanced EFIS.
Any guidance would be appreciated.
Guy Bourgeois
RV7A C-GUYW
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02-01-2008, 12:02 AM
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Join Date: Sep 2005
Location: Dothan, Alabama
Posts: 1,487
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Here is how I did mine:
I was into model airplanes before I started building the 7A. The linkage is a model airplane pushrod with Sulivan clevis'
__________________
Alton DeWeese
N526RV RV7A Tip Up, IO360 180 W/Hartzel BA prop.
Flying ~950 hours since Aug 2010
N4IDH
Construction Log
?The secret of getting ahead is getting started. The secret of getting started is breaking your complex overwhelming tasks into small manageable tasks, and then starting on the first one.?
?Mark Twain
Last edited by AltonD : 02-01-2008 at 05:48 AM.
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02-01-2008, 12:30 AM
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Join Date: Mar 2007
Location: Corvallis Oregon.
Posts: 680
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That's so straight forward I might try it.
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02-01-2008, 05:27 AM
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Join Date: Jan 2005
Location: KPYM
Posts: 2,686
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Hey Guy and Alton, I am interested in this too.
Is the Ray Allen a variable resistor?
I cross posted this in the AFS forum as well.
What do we know about how the Ray Allen unit works with the AFS EFIS?
I am thinking that a variable resistor is what we need, no?
 CJ
__________________
RV-7 Flying - 1,200 Hours in 5 Years!
The experiment works!
TMX-IO-360, G3i ignition & G3X with VP-X
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02-01-2008, 05:47 AM
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Join Date: Sep 2005
Location: Dothan, Alabama
Posts: 1,487
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The Ray Allen sensor is just that, a varible resistor. The wiring diagram for the AFS-35/3400 already has the correct color codes for this sensor. As a matter of fact, I just looked at the drawing, it even list the POS-12 sensor.
__________________
Alton DeWeese
N526RV RV7A Tip Up, IO360 180 W/Hartzel BA prop.
Flying ~950 hours since Aug 2010
N4IDH
Construction Log
?The secret of getting ahead is getting started. The secret of getting started is breaking your complex overwhelming tasks into small manageable tasks, and then starting on the first one.?
?Mark Twain
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02-01-2008, 05:50 AM
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Join Date: Jan 2005
Location: KPYM
Posts: 2,686
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Alton, I was just researching this now too!
Hmmmm, cool stuff!
Tell me about these model airplane parts. What exactly are they called and where do you get them?
CJ
__________________
RV-7 Flying - 1,200 Hours in 5 Years!
The experiment works!
TMX-IO-360, G3i ignition & G3X with VP-X
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02-01-2008, 06:02 AM
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Join Date: Sep 2005
Location: Dothan, Alabama
Posts: 1,487
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take a look at this:
http://www.greatplanes.com/accys/gpmq3710.html
I use a threaded rod on one end with a 2-56 threaded clevis. On the other end, since there are no threads, I cut to length and solder on an un-threaded clevis.
The threaded ones I use: http://www3.towerhobbies.com/cgi-bin...&I=LXRU46&P=ML
The solder: http://www3.towerhobbies.com/cgi-bin...EARCH=GPMQ3811+
The higher you mount the sensor, the better the angle. Where I have it located, it strokes smooth with no binding. YMMV.
Use the tower link http://www.towerhobbies.com/ if you don't have a hobby store locally.
__________________
Alton DeWeese
N526RV RV7A Tip Up, IO360 180 W/Hartzel BA prop.
Flying ~950 hours since Aug 2010
N4IDH
Construction Log
?The secret of getting ahead is getting started. The secret of getting started is breaking your complex overwhelming tasks into small manageable tasks, and then starting on the first one.?
?Mark Twain
Last edited by AltonD : 02-01-2008 at 06:12 AM.
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02-01-2008, 06:15 AM
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Join Date: Jan 2005
Location: KPYM
Posts: 2,686
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Hmmmm, cool!
I will look into it!
Thanks Alton!
Nice work!
 CJ
__________________
RV-7 Flying - 1,200 Hours in 5 Years!
The experiment works!
TMX-IO-360, G3i ignition & G3X with VP-X
Last edited by Captain_John : 02-01-2008 at 06:17 AM.
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02-01-2008, 06:24 AM
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Join Date: Sep 2005
Location: Dothan, Alabama
Posts: 1,487
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I actually came up with that independently. After the fact, I was looking at Dan's site, we did it almost exactly the same. I yield to the master.
http://www.rvproject.com/20030522.html
http://www.rvproject.com/20030714.html
__________________
Alton DeWeese
N526RV RV7A Tip Up, IO360 180 W/Hartzel BA prop.
Flying ~950 hours since Aug 2010
N4IDH
Construction Log
?The secret of getting ahead is getting started. The secret of getting started is breaking your complex overwhelming tasks into small manageable tasks, and then starting on the first one.?
?Mark Twain
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02-01-2008, 09:13 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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I did something very similar on the 10, except it is mounted on the exterior of the fuse, at the wing root.
An "L" bracket bent from .063, is used to mount the sensor, R/C hardware for the linkage.
The hardest part is matching the travel.
Good luck, easy project.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010 
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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