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Great idea, but my relay
coils (vintage 1990 360) require 4 amps, tested today, perhaps 5 amps with
engine running. We would need a power transistor to supply the required
current.
Anybody know of a similar PS with a 5A or greater rating?
--- On Mon, 2/7/11, Bruce <BGray@glasair.org>
wrote:
From: Bruce <BGray@glasair.org>
Subject: [LML] Re: LNC2 Hydraulic Landing Gear Pressure Switch Wear Issues
To: lml@lancaironline.net
Date: Monday, February 7, 2011, 8:18 PM
I would think that ½
amp at 14v should be enough.
-----Original
Message-----
From: Lancair Mailing List
[mailto:lml@lancaironline.net] On Behalf Of
Sky2high@aol.com
Sent: Monday, February 07, 2011
2:53 PM
To: lml@lancaironline.net
Subject: [LML] Re: LNC2
Hydraulic Landing Gear Pressure Switch Wear Issues
Their specs look great. Is the 500 mA current limitation
adequate for operating clunky 12 VDC intermittent relays (the pump power
switch relays)?
In a message dated 2/7/2011 11:32:18 A.M. Central Standard Time,
BGray@glasair.org writes:
Several of our guys (including me) have junked our mechanical
pressure switches and moved to solid state adjustable switches.
http://www.automationdirect.com/adc/Search/Search?searchquery=PSD25-OP-5800H&cmd=Search&fctype=adc.falcon.search.SearchFormCtrl&TxnNumber=-1
-----Original Message-----
From: Lancair Mailing List
[mailto:lml@lancaironline.net] On Behalf Of
Don Gordon
Sent: Monday, February 07, 2011
7:45 AM
To: lml@lancaironline.net
Subject: [LML] LNC2 Hydraulic
Landing Gear Pressure Switch Wear Issues
I have recently replaced both my high pressure and low pressure
switches in the hydraulic system for the landing gear. These switches
began to have trouble providing a positive and discrete on/off event when the
hydraulic pressure reached the prescribed limits. I began to hear
strange crackling and static noises in my headset just prior to the hydraulic
pump running (though it would just run for a fraction of a second to
re-pressurize). These strange sounds in my headset began to occur
longer and longer prior to the pump tripping on. I also began to notice
some other odd electrical issues with the aircraft. Finally, I began to
suspect these switches were faulty are replaced both of them. The
problem went away and so did my electrical issues I experienced.
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