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  #1  
Old 12-16-2010, 11:14 AM
Dean Pichon Dean Pichon is offline
 
Join Date: May 2006
Posts: 532
Default 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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  #2  
Old 12-16-2010, 11:20 AM
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Walt Walt is offline
 
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
Default

I use a Cole Hersee 24143.

http://www.colehersee.com/pdf/master_cat/e_solenoid.PDF
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  #3  
Old 12-16-2010, 11:26 AM
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9GT 9GT is offline
 
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Location: Southern Michigan
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Default

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
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  #4  
Old 12-16-2010, 08:47 PM
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MCA MCA is offline
 
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Posts: 693
Default

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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Marc Ausman
RV-7 980 hours, IO-390, VP-X (sold)
RV-8 (flying a friend's)
Thinking about low and slow backcountry build.

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  #5  
Old 12-17-2010, 05:59 AM
asav8tor asav8tor is offline
 
Join Date: Oct 2006
Location: Seattle, wa
Posts: 679
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Quote:
Originally Posted by Walt View Post
yup.... That is the one. It is also an upgraded one from stock.
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  #6  
Old 12-17-2010, 10:20 AM
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MauiLvrs MauiLvrs is offline
 
Join Date: Jan 2008
Location: KTCY
Posts: 643
Default

Here is the link....
Quote:
Originally Posted by MCA View Post
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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  #7  
Old 12-17-2010, 10:23 AM
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Garage Guy Garage Guy is offline
 
Join Date: Mar 2008
Location: San Diego
Posts: 457
Default 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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  #8  
Old 12-17-2010, 03:19 PM
Dean Pichon Dean Pichon is offline
 
Join Date: May 2006
Posts: 532
Default Great leads...

Thanks for all the leads. Very helpful
Quote:
Originally Posted by MCA View Post
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.
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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  #9  
Old 12-19-2010, 02:22 PM
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MCA MCA is offline
 
Join Date: Jun 2005
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Quote:
Originally Posted by Dean Pichon View Post
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,
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.
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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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  #10  
Old 12-20-2010, 09:07 AM
Steve Sampson Steve Sampson is offline
 
Join Date: Aug 2005
Location: N. Yorkshire, England
Posts: 1,050
Default

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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