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-   -   Warm Master Selenoid (https://vansairforce.net/community/showthread.php?t=141045)

Jesse 08-20-2016 07:02 PM

Quote:

Originally Posted by tthrew (Post 1105087)
I thought you were supposed to have your radios and electronics powered off when starting. Is that idea out of date?

Most instruments are best to leave off during start unless you have a backup power source. The EFIS that shows engine data, however, should be on, so you can verify oil pressure immediately after start. The Dynon's have built in (or built into the main harness) dedicated backup batteries. The AFS prior to the 5000 series have built in batteries. The AFS 5000 series and the G3X have a backup power inout that can be run off a separate battery that is not used to crank the engine (the TCW battery is built for this).

Walt 08-20-2016 07:04 PM

The Lamar continuous duty contactor draws about 800ma (0.8a), not all that much.

Pull in and drop out voltages are rated at 8/4.5v respectively, curious what those are for the blue sea.

rzbill 08-21-2016 05:59 AM

Quote:

Originally Posted by Carl Froehlich (Post 1104992)
Yep - it turns out the master solenoid is a power hog. I had two of these (one for each battery) so they were consuming more power than anything else.

I now use these: https://www.amazon.com/SYSTEMS-Blue-...e+sea+solenoid

It draws only 0.13 amps for hold current. The price is too high - but I was able to find them for a lot less on eBay.

Carl

Where DID i put that old copper knife switch????? :)

I remember seeing this contactor noted somewhere in Aeroelectric docs. Very nice, but pricey as you said. Still thought about it. Mine is a B&C S701-1. My load chart shows 1 amp for it.

Walt 08-21-2016 06:20 AM

Quote:

Originally Posted by rzbill (Post 1105132)
Where DID i put that old copper knife switch????? :)

I remember seeing this contactor noted somewhere in Aeroelectric docs. Very nice, but pricey as you said. Still thought about it. Mine is a B&C S701-1. My load chart shows 1 amp for it.

The Eaton unit is the one you are thinking of:
http://www.skygeek.com/eaton-aerospa...omagnetic.html

rzbill 08-21-2016 06:40 AM

Quote:

Originally Posted by Walt (Post 1105136)
The Eaton unit is the one you are thinking of:
http://www.skygeek.com/eaton-aerospa...omagnetic.html

You made me look..:)

My memory was off. I was thinking of a CII Technologies EV-200 contactor that Bob N was suggesting for a starter contactor. Very similar form factor to the Blue Sea but different application so the coil will be different.

wm708 08-21-2016 04:39 PM

Thinking about using this solenoid. No power used while activated.
What you say?

http://www.partdeal.com/cole-hersee-...3ZEaAhWR8P8HAQ

Bill

Carl Froehlich 08-21-2016 06:11 PM

Quote:

Originally Posted by wm708 (Post 1105281)
Thinking about using this solenoid. No power used while activated.
What you say?

http://www.partdeal.com/cole-hersee-...3ZEaAhWR8P8HAQ

Bill

Latching solenoids tend to not be suitable for aircraft use. While it might stay latched with power removed, it could open on a minor G bounce. Without any specs you cannot tell.

Carl


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