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12-15-2012, 03:38 PM
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Join Date: Feb 2007
Location: Bakersfield, CA
Posts: 214
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Hobbs Pressure switch
Can I use this port on my O-320 for the Hobbs pressure switch? I have used the only other port that the switch will fit into for the oil pressure sensor. Thanks!
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Bruce Peters
Bakersfield, CA
RV-9A, Flying 11/21/15
VAF#1145
Donation up to date 08/20
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12-15-2012, 04:03 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,668
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The best way is to mount a manifold on the firewall (via flex line) and keep the sensors off the engine.
__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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12-15-2012, 04:10 PM
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Join Date: Jul 2005
Location: Southern California
Posts: 617
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Off engine?
Doesn't that add the risk of a blown oil line resulting in oil loss? Is an oil sensor sensitive to vibration? 
CC
Quote:
Originally Posted by Walt
The best way is to mount a manifold on the firewall (via flex line) and keep the sensors off the engine.
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__________________
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David Boeshaar
RV-9A - N18TD (reserved) - Fuselage.
"My greatest fear: What if the hokey pokey really IS what its all about?" 
TDAircraft.com
-July-
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12-15-2012, 04:33 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,668
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Sensors are subject to breakage when engine mounted, standard practice is to remote mount sensors via flex line.
Use the oil pressure line which "should" have a restrictor fitting in it anyway.
__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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12-15-2012, 06:04 PM
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Join Date: Feb 2005
Location: Marysville, WA
Posts: 519
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Not Trying to Stael the Thread, but...
Does the Hobbs meter have to have a separate pressure switch? Is there any reason it can't use the same sensor that sends the oil pressure indication? I ask because my -4 doesn't have a Hobbs meter and I would like to install one, but I don't want to mount another sensor and all that.
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Steve Rush
Arlington, WA
ArlingtonRV on YouTube
RV-8 (Bought Flying)
Glasair Sportsman (Sold)
RV-8 Tail, QB Fuselage (Sold)
RV-4 (Bought Flying) (Sold)
RV-9 Tail
RV-12 120018 Flying (Sold)
RV-7 Tail, Wings, Started Fuse (Sold)
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12-15-2012, 07:37 PM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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You want a seperate pressure switch. If you have the Vans firewall manifold you can usually add it right there.
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Actual repeat offender.
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12-15-2012, 07:52 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,668
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Quote:
Originally Posted by ArlingtonRV
Does the Hobbs meter have to have a separate pressure switch? Is there any reason it can't use the same sensor that sends the oil pressure indication? I ask because my -4 doesn't have a Hobbs meter and I would like to install one, but I don't want to mount another sensor and all that.
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You can use the B&C oil pres switch for both idiot lite and hobbs:
__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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12-15-2012, 08:30 PM
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Join Date: Feb 2005
Location: Marysville, WA
Posts: 519
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Thanks for the help.
__________________
Steve Rush
Arlington, WA
ArlingtonRV on YouTube
RV-8 (Bought Flying)
Glasair Sportsman (Sold)
RV-8 Tail, QB Fuselage (Sold)
RV-4 (Bought Flying) (Sold)
RV-9 Tail
RV-12 120018 Flying (Sold)
RV-7 Tail, Wings, Started Fuse (Sold)
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12-16-2012, 05:55 PM
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Join Date: Feb 2007
Location: Bakersfield, CA
Posts: 214
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Thanks everybody!
__________________
Bruce Peters
Bakersfield, CA
RV-9A, Flying 11/21/15
VAF#1145
Donation up to date 08/20
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12-16-2012, 06:35 PM
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Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
Posts: 2,406
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I have a pressure sensor that has two terminals on it. I was told to connect the line from the EIS to the terminal marked as G. I'm wandering if the other one, (cannot remember it's markings , might be SW )not being used could be used for the hobbs? If not what is it's function?
Thanks Ron
__________________
Thanks Ron
RV-10 SOLD
RV-14 Flying
AirCam flying
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