Today's Message Index:
----------------------
1. 06:30 AM - Re: Keyed Master Switch? (Andrew Butler)
2. 06:51 AM - Re: Keyed Master Switch? (Mark Sletten)
3. 07:02 AM - Keyed Master Switch?Keyed Master Switch? (ROGER & JEAN CURTIS)
4. 07:51 AM - Re: Re: Keyed Master Switch? (Ken)
5. 09:31 AM - Re: Re: Keyed Master Switch? (Terry Watson)
6. 11:50 AM - Re: Keyed Master Switch? (Steven Eberhart)
7. 06:59 PM - Ground Start enunciator light (Carlos Trigo)
8. 07:41 PM - Re: Ground Start enunciator light (Ron Shannon)
9. 08:11 PM - Re: ANL 50 Failure (Robert L. Nuckolls, III)
10. 08:13 PM - Re: Ground Start enunciator light (Robert L. Nuckolls, III)
11. 08:13 PM - Re: Ground Start enunciator light (Richard T. Schaefer)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Keyed Master Switch? |
Hi Charlie,
What type of switch are you using and where did you source it?
Cheers, Andrew.
----- Original Message -----
From: "CHARLES T BECKER"
To: aeroelectric-list@matronics.com
Subject: Re: AeroElectric-List: Keyed Master Switch?
Date: Fri, 14 Mar 2008 15:09:25 -0400
Dennis has the right idea, especially in light of all the emphasis on
'2 locks'. My 8A will
have a key switch between the battery and the starter switch. The
actual starter switch will be
on the stick, controlling a relay in the starter circuit.
Charlie Becker
N464CB(r) 8A(e)
Finishing
On Fri, 14 Mar 2008 11:51:42 -0400
"Glaeser, Dennis A" wrote:
>
> Consider putting a keyed switch in the Push Button Start circuit.
If
> the key isn't on, the start button doesn't work! One switch does
the
> trick and it doesn't put another switch (point of failure) in any
of
> your other critical circuits.
> Your ignition systems may be live if their switches are flipped,
but
> nothing happens without the starter.
>
> Dennis Glaeser
> RV7A - Subaru H6 - DAR inspection next week!
>
> -----------------------------------------
> I plan on a PUSH Button Start and Dual Electonic Ignition. Can
anyone
> help with a method of enabling "key start" access to
ignition/power?
>
> I have dual paths to each ignition, so need four switches (to
enable
> pre-flight checks of each path), so the documented adapted mag key
start
> switch option won't work.
>
> I can't get fully comfortable with a fully live system being just a
flip
> of a switch away....... See attached to get the idea.
>
> Best regards,
>
> Andrew Butler
> RV 71700 - West of Ireland.
> Fueslage (right way up!)
>
>
>
> Un/Subscription,
> http://www.matronics.com/Navigator?AeroElectric-List
> Forums!
> Admin.
>
>
>
===========
===========
===========
===========
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Keyed Master Switch? |
Why not just use a standard keyed starter switch? Get rid of all the other
push button/toggle switches in the circuit. Power your electrical system
thru a standard toggle if you like and just use the starter side of the
keyed switch in the starter circuit.
Regards,
Mark
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Keyed Master Switch?Keyed Master Switch? |
Terry,
I would put, on the instrument panel, a simple key switch, (on-off) no
other
contacts, between the 12V supply and the start button. This has several
advantages, convenience, ease of use, and due to the convenience and
ease of
use it will get used regularly to help protect your aircraft from theft.
These switches are available from electronic supply houses, cheap.
Roger
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Keyed Master Switch? |
Automotive and farm suppliers sell good key switches for around $12 and
marine suppliers (at about twice the price) as well. Typically rated for
a 25 amp starter solenoid load. I use one for the battery master and the
spring loaded position cranks the engine. I like the fact that with the
key in my pocket nobody can crank the engine accidentally, and that from
cars we subconsciously associate keys with cranking. Also I think there
is very little chance of the circuit staying energized after cranking
since my fingers can force it back from the crank position even if the
spring fails or the contacts try to weld. Of course my starter solenoid
can still physically stick, but not the switch I hope.
Ken
Mark Sletten wrote:
>
> Why not just use a standard keyed starter switch? Get rid of all the other
> push button/toggle switches in the circuit. Power your electrical system
> thru a standard toggle if you like and just use the starter side of the
> keyed switch in the starter circuit.
>
> Regards,
>
> Mark
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Keyed Master Switch? |
Think of it this way: I prefer combination locks to keyed locks because the
latter requires that I have the proper physical key with me while a
combination lock requires only that I know how to open it. What I am
proposing amounts to a combination lock on the ignition: you just have to
know where the switches are. Locking the baggage compartment where the
disconnect switch is located is that additional security feature that we are
now required to have.
When I was in college I bought a sad looking '50 Chevy sedan for $60. It
turned out to be a great car until I ran it low on oil and threw a rod, but
one of the great features was the ignition switch. Key use was optional. You
could turn it to the left with the key in it and remove the key and it was
locked, or you could just remove the key without turning it to the left and
it was still an ignition switch but didn't require a key.
Yes, canopy and baggage compartments will still require a key. My current
Mazda MX-5 only requires that I have the key in my pocket and it
"recognizes" me and allows me to open the doors or trunk and start the
engine. But that's way more complex than I want to go with my airplane.
Terry
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Mark
Sletten
Sent: Saturday, March 15, 2008 6:47 AM
Subject: AeroElectric-List: Re: Keyed Master Switch?
<marknlisa@hometel.com>
Why not just use a standard keyed starter switch? Get rid of all the other
push button/toggle switches in the circuit. Power your electrical system
thru a standard toggle if you like and just use the starter side of the
keyed switch in the starter circuit.
Regards,
Mark
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Keyed Master Switch? |
I like the idea of a shorting plug that will short the mag p leads to
ground. Insert the plug to disable the airplane. Remove the plug to
fly. You really are not adding anything to fail in flight. I will only
be using it when away from my home field. Simple, cheap and relatively
free from unintended consequences (I think).
Steve Eberhart
RV-7A, Wiring up everything so I can finally fly this thing.
Andrew Butler wrote:
> All,
>
> I plan on a PUSH Button Start and Dual Electonic Ignition. Can anyone
> help with a method of enabling "key start" access to ignition/power?
>
> I have dual paths to each ignition, so need four switches (to enable
> pre-flight checks of each path), so the documented adapted mag key
> start switch option won't work.
>
> I can't get fully comfortable with a fully live system being just a
> flip of a switch away....... See attached to get the idea.
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Ground Start enunciator light |
Listers
I installed a Piper-type male socket to my airplane, to have the possibility
of a ground start in case of a low battery cranking difficulty.
As recommended by this List experts, I connected the socket to the battery
through a continuous duty contactor (aka Master Relay or Battery solenoid),
the S701-1 from B&C, controlled by a SPST switch, which grounds the
contactor when thrown to ON.
Now what I want to do is to put a green enunciator light in my panel, which
illuminates when that switch is ON and the contactor is closed to allow the
ground start procedure, to remind me to switch it Off after finishing that
procedure.
I have tried some wiring of the warning light to the switch, but I cannot
make it work properly. Can somebody please enlighten me how to wire it?
TIA
Carlos
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Ground Start enunciator light |
I assume you want this to be on whenever the ground switch (relay) is ON,
whether external power is connected or not. If so, use a DPDT switch for the
relay instead of an SPST, and use the extra pair of contacts to switch the
light to run from your main battery bus.
Ron
On 3/15/08, Carlos Trigo <trigo@mail.telepac.pt> wrote:
>
> trigo@mail.telepac.pt>
>
> Listers
>
> I installed a Piper-type male socket to my airplane, to have the
> possibility
> of a ground start in case of a low battery cranking difficulty.
> As recommended by this List experts, I connected the socket to the battery
> through a continuous duty contactor (aka Master Relay or Battery
> solenoid),
> the S701-1 from B&C, controlled by a SPST switch, which grounds the
> contactor when thrown to ON.
>
> Now what I want to do is to put a green enunciator light in my panel,
> which
> illuminates when that switch is ON and the contactor is closed to allow
> the
> ground start procedure, to remind me to switch it Off after finishing that
> procedure.
>
> I have tried some wiring of the warning light to the switch, but I cannot
> make it work properly. Can somebody please enlighten me how to wire it?
>
> TIA
> Carlos
>
>
Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: ANL 50 Failure |
At 09:49 AM 3/14/2008 -0700, you wrote:
>Here is a picture of a current limiter from a recent job. It had been
>replaced for unknown reasons over a year ago. The installer didn't use a
>washer between the limiter terminal tab and the nut. The nut grabbed and
>torqued the tab, deformed the ears that are supported by the rivets, and
>partially tore the base of the filiment (right word?).
Looks like it was probably stress cracked, there's
no evidence of a melt-open event.
> After many months the filiment finally broke. I don't think it was
> experienceing any particularly high current load, but from the looks of
> the mounting terminal, it did see some pretty rough handling.
Thanks for sharing this with us. This is
an excellent reminder of the need to think about
where reaction torques are going when we cinch things
down tight. Another at-risk-joint is on the fat-wire
main terminals of these contactors:
http://www.aeroelectric.com/Pictures/Contactors/s701-2.jpg
It's a good idea to put a wrench on the nut adjacent
to the case and put some counter-acting torque while
tightening the nut that holds wires.
Take a look at:
http://www.aeroelectric.com/Pictures/Fuses/Fuse_Holders/ANN-ANL_Base.jpg
If you look real closely under the washers, you'll see the
bottom nut in the stack for each terminal. The things that
should on top of the first nut are terminals on ends of wires
and/or straps. Next is the second, thin,-jam nut, preferably
brass torqued to 80% of ultimate for brass. The ANL limiter goes next
followed by the washer and finally, the third locking nut shown.
This order of assembly allows replacing of the ANL without
opening the joints for conductors.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 10
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Ground Start enunciator light |
At 01:53 AM 3/16/2008 +0000, you wrote:
><trigo@mail.telepac.pt>
>
>Listers
>
>I installed a Piper-type male socket to my airplane, to have the possibility
>of a ground start in case of a low battery cranking difficulty.
>As recommended by this List experts, I connected the socket to the battery
>through a continuous duty contactor (aka Master Relay or Battery solenoid),
>the S701-1 from B&C, controlled by a SPST switch, which grounds the
>contactor when thrown to ON.
>
>Now what I want to do is to put a green enunciator light in my panel, which
>illuminates when that switch is ON and the contactor is closed to allow the
>ground start procedure, to remind me to switch it Off after finishing that
>procedure.
>
>I have tried some wiring of the warning light to the switch, but I cannot
>make it work properly. Can somebody please enlighten me how to wire it?
The schematic is shown at:
http://www.aeroelectric.com/articles/grndpwr.pdf
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 11
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Ground Start enunciator light |
You might also want to power the relay from the external power with a diode
to verify that the external power is of the right polarity.
r.t.s.
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Carlos
Trigo
Sent: Saturday, March 15, 2008 8:54 PM
Subject: AeroElectric-List: Ground Start enunciator light
<trigo@mail.telepac.pt>
Listers
I installed a Piper-type male socket to my airplane, to have the possibility
of a ground start in case of a low battery cranking difficulty.
As recommended by this List experts, I connected the socket to the battery
through a continuous duty contactor (aka Master Relay or Battery solenoid),
the S701-1 from B&C, controlled by a SPST switch, which grounds the
contactor when thrown to ON.
Now what I want to do is to put a green enunciator light in my panel, which
illuminates when that switch is ON and the contactor is closed to allow the
ground start procedure, to remind me to switch it Off after finishing that
procedure.
I have tried some wiring of the warning light to the switch, but I cannot
make it work properly. Can somebody please enlighten me how to wire it?
TIA
Carlos
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|