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12-16-2010, 11:14 AM
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Join Date: May 2006
Posts: 532
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Master Relay Recommendations Sought
Hi,
I'm making some upgrades to the electrical system in my -4 and am looking for a new master solenoid (40amp, continuous duty). I've looked in the usual places, but haven't found much of a selection. Can any recommend a part? So far, I have found only 1 option in Aircraft Spruce - nothing at either Steinair or Aeroelectric.
Thanks,
Dean
Bolton, MA
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12-16-2010, 11:20 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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__________________
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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12-16-2010, 11:26 AM
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Join Date: Jan 2010
Location: Southern Michigan
Posts: 1,966
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I am using these from The Drill Spot,,,,,They have a great selection and good pricing. Also available in 24V which I am doing. http://www.drillspot.com/products/44...power_solenoid
__________________
David C.
Howell, MI
RV-10: #41686 Under Construction
RV-9A: #90949 Under Construction
RV-10: #40637 Completed/Sold 2016
Cozy MKIV:#656 Completed/Sold 2007
"Donor Exempt" but donated through Dec. 2020
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12-16-2010, 08:47 PM
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Join Date: Jun 2005
Posts: 693
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Van's sells the standard master relay. You can call them and order directly.
I assume you are running an O-320? The 40A seems quite low, considering it needs to carry the starter load.
__________________
Marc Ausman
RV-7 980 hours, IO-390, VP-X (sold)
RV-8 (flying a friend's)
Thinking about low and slow backcountry build.
VAF Advertiser - Aircraft Wiring Guide
Book to help with experimental aircraft wiring.
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12-17-2010, 05:59 AM
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Join Date: Oct 2006
Location: Seattle, wa
Posts: 679
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Quote:
Originally Posted by Walt
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yup.... That is the one. It is also an upgraded one from stock.
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12-17-2010, 10:20 AM
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Join Date: Jan 2008
Location: KTCY
Posts: 643
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Here is the link....
Quote:
Originally Posted by MCA
Van's sells the standard master relay. You can call them and order directly.
I assume you are running an O-320? The 40A seems quite low, considering it needs to carry the starter load.
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Dave & Trina
RV-9A Flying  - 330 Hrs. Painted  Finishing the interior.
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12-17-2010, 10:23 AM
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Join Date: Mar 2008
Location: San Diego
Posts: 457
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Echlin ST-80
The master solenoid in our RV-6 was a Cole-Hersee 24115 (85 amp continuous rating). When it failed, we replaced it with an Echlin ST-80 (80 amp continuous) from NAPA, which has been working fine. Just another possible option to consider.
--Paul
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12-17-2010, 03:19 PM
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Join Date: May 2006
Posts: 532
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Great leads...
Thanks for all the leads. Very helpful
Quote:
Originally Posted by MCA
Van's sells the standard master relay. You can call them and order directly.
I assume you are running an O-320? The 40A seems quite low, considering it needs to carry the starter load.
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I'm running an IO-360, but have my system configured such that the starter current does not go thru the master solenoid. I have a dedicated starter solenoid that carries the all the starter current (and nothing else).
Thanks again,
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12-19-2010, 02:22 PM
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Join Date: Jun 2005
Posts: 693
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Quote:
Originally Posted by Dean Pichon
Thanks for all the leads. Very helpful
I'm running an IO-360, but have my system configured such that the starter current does not go thru the master solenoid. I have a dedicated starter solenoid that carries the all the starter current (and nothing else).
Thanks again,
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Got it. Normally the starter solenoid is wired in series with the master solenoid so that if the starter solenoid sticks closed you can disengage the starter by turning off the master switch.
__________________
Marc Ausman
RV-7 980 hours, IO-390, VP-X (sold)
RV-8 (flying a friend's)
Thinking about low and slow backcountry build.
VAF Advertiser - Aircraft Wiring Guide
Book to help with experimental aircraft wiring.
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12-20-2010, 09:07 AM
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Join Date: Aug 2005
Location: N. Yorkshire, England
Posts: 1,050
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Dean, there is a Bosche relay, # 0 332 002 150 you may want to take a look at. Its designed for Fork Lift trucks. It runs up to 400amps for > 1 sec, which is more than we need.
Its very compact. It looks unlikely 'til you read the spec. I was introduced to it by the Aviat Husky community.
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