Thanks Paul-
I’m of the same vintage as the relay but considerably more failure prone and
less predictable- probably the weakest link in the whole plane.
I’ve had some experience with antique vehicles so I imagine the
lacquer on the windings and insulation materials would still be good- I’m
curious about the resistance readings. I have a very basic education from
studying The AeroElectric Connection 15 years ago so I hope to learn more.
I’m guessing the Leach has more windings of finer wire. Would that
make it more likely to overheat than the Lancair unit? Does it suggest anything
about the intended applications?
Thanks- Bill Wade
Sent: Wednesday, May 02, 2012 4:32 PM
Subject: [LML] Re: Contactors vs Solid State
Relays
Well,
Bill, using 1960's NOS parts for a modern airplane? That's about the
dumbest idea I've heard today.
Paul
Legacy
Spruce Creek
(P.S. I'm using a dozen 1961 NOS spark plugs and the Legacy purrs
much better than my mega-ohm'd resistance chumpions so good luck as I'm thinking
your relay is well preserved and well built).
On 2012-05-02, at 3:15 PM, Bill Wade wrote:
Aircraft
Spruce carries a solid-state “Superswitch” contactor from Lamar Technologies.
Has anyone used these?
FWIW there are
a number of NOS 24V 50A Leach contactors for sale on Ebay. I got a few with
the idea of replacing the hydraulic pump relay supplied by Lancair. They
arrived in sealed original packaging- no date of manufacture but my guess is
50’s or 60’s. The exposed insulation appears to be sound and the units
function properly.
The Leach unit
weighs 8.12 oz., about 5 oz. less than the Lancair style and the windings
measure 152.7 Ohms vs. 62.7. The pump draws about 30A at system pressure
according to the Oildyne chart. Comments?
Thanks- Bill
Wade