KR> Ignition switch

[Mark Langford]

Paul Visk wrote:

 >>Did the switch fail because it was undersized for a DC circuit?

I don't think so.  It's supposed to be rated for 10A, and I was only 
pulling 5.1A through it, and one just like it (bought at the same time 
from AS) powered the same system on N56ML for all that time with zero 
problems.  I think it was infant mortality...it literally rattles now, 
as if a contact broke completely loose inside.  I borrowed the one from 
N56ML for now, but will install a 30A DC version shortly.  I flew it 
almost every day last week, and the only reason I quit after only a half 
hour today is because it started hailing on me...

Mark Langford
ML at N56ML.com
http://www.n56ml.com

KR> Ignition switch

[ppaulvsk]

Thank Mark for the reply. Give me something to think about.?
Did the switch fail because it was undersized for a DC circuit? ?

Sent on the new Sprint Network from my Samsung Galaxy S?4.

 Original message From: Mark Langford via KRnet 
 Date:10/08/2014  8:02 PM  (GMT-06:00) 
To: KRnet  Subject: Re: KR> 
Ignition switch 
Paul Visk wrote:

>> I  was looking at WW's Critical Electrical System Diagram and 
thought of you when your ignition  switch failed.  Did both sides fail 
or just your primary side? WW has a DPDT switch fuel/coil on his 
design. I'm thinking  this is a single point failure possibility. 
  Wouldn't it be better to have two separate SPST switches to totally 
isolate the systems?<<

Only one side failed...the beauty of a double pole switch...the two 
circuits are completely isolated from each other, except they are within 
one enclosure.   I'm pretty sure WW got that idea from me...I did it 
first and he liked the idea, at least that's what he told me.  You could 
use two SPST switches, but when you do that you have the possibility of 
having them both turned off at once...not good in a rapid-first highly 
tense situation where that could be overlooked, and you'd also be 
connecting fuel to ignition, rather than keeping them separated.  You'd 
need four SPST switches to accomplish the same functionality, with an 
increase in human error potential.  When I flip my switch I wouldn't 
even notice anything happened except the green LED turns RED (it's a 
bicolor).  See http://www.n56ml.com/electrical/index.html to get the 
gist of how mine is done (although the bicolor LED isn't shown here).  
N56ML flew 1130 hours with this setup without a single hiccup.

Since the bad switch incident, I now start the engine with the switch in 
the "backup" mode, so the ignition gets its juice from the backup 
battery, rather than the main circuit.  This not only gives me a check 
of the backup battery, but it ensures the ignition system is getting a 
full 12.8V during starting, rather than "whatever is left over" when the 
starter has taken a huge bite out of the main battery power.   Once it 
starts, I swap it over to "primary" to make that red LED go away, and 
continue to fly it that way until I land. Works for me!   Of course the 
iEFIS also monitors and displays the voltage on both backup and main 
battery at all times anyway, so the main point is more juice to the 
ignition system and a check of the switch, rather than doing it on runup.

-- 

Mark Langford
ML at N56ML.com
http://www.n56ml.com


___
Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
please see other KRnet info at http://www.krnet.org/info.html
see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change 
options

KR> Ignition switch

[Mark Langford]

Paul Visk wrote:

 >> I  was looking at WW's Critical Electrical System Diagram and 
thought of you when your ignition  switch failed.  Did both sides fail 
or just your primary side? WW has a DPDT switch fuel/coil on his 
design. I'm thinking  this is a single point failure possibility. 
  Wouldn't it be better to have two separate SPST switches to totally 
isolate the systems?<<

Only one side failed...the beauty of a double pole switch...the two 
circuits are completely isolated from each other, except they are within 
one enclosure.   I'm pretty sure WW got that idea from me...I did it 
first and he liked the idea, at least that's what he told me.  You could 
use two SPST switches, but when you do that you have the possibility of 
having them both turned off at once...not good in a rapid-first highly 
tense situation where that could be overlooked, and you'd also be 
connecting fuel to ignition, rather than keeping them separated.  You'd 
need four SPST switches to accomplish the same functionality, with an 
increase in human error potential.  When I flip my switch I wouldn't 
even notice anything happened except the green LED turns RED (it's a 
bicolor).  See http://www.n56ml.com/electrical/index.html to get the 
gist of how mine is done (although the bicolor LED isn't shown here).  
N56ML flew 1130 hours with this setup without a single hiccup.

Since the bad switch incident, I now start the engine with the switch in 
the "backup" mode, so the ignition gets its juice from the backup 
battery, rather than the main circuit.  This not only gives me a check 
of the backup battery, but it ensures the ignition system is getting a 
full 12.8V during starting, rather than "whatever is left over" when the 
starter has taken a huge bite out of the main battery power.   Once it 
starts, I swap it over to "primary" to make that red LED go away, and 
continue to fly it that way until I land. Works for me!   Of course the 
iEFIS also monitors and displays the voltage on both backup and main 
battery at all times anyway, so the main point is more juice to the 
ignition system and a check of the switch, rather than doing it on runup.

-- 

Mark Langford
ML at N56ML.com
http://www.n56ml.com

KR> Ignition switch

[ppaulvsk]

Mark,?
? ? ?I ?was looking at WW's Critical Electrical System Diagram and though of 
you.
? ? ?When your ignition ?switch failed. ?Did both sides fail or just your 
primary side?
? ? WW has a DPDT switch fuel/coil on his design.?
? ? I'm thinking ?this is a single point failure possibility. ?Wouldn't it be 
better to have two separate SPST switches to totally isolate the systems?

Paul Visk
Belleville Il
618 406 4705


Sent on the new Sprint Network from my Samsung Galaxy S?4.

KR> Ignition Switch

[Mark Jones]

I have recently acquired a brand new Bendix OFF-R-L-BOTH-START ignition switch 
part number 10-357210-1. I want to use this switch to operate my two coils 
independently as R or L and have the ability to run BOTH just as you would a 
mag set up. I was just bench testing the switch with it hooked to a battery. 
Using a test light, the starter position worked but I could not get the 
R-L-BOTH positions to work. Is there some magic to a Bendix switch that I am 
overlooking? Tony Bingelis' book "Firewall Forward" shows the wiring diagram 
but that is basically all it says about it. Any help would be appreciated as I 
would like to get rid of the cheap switch I am currently using and use this 
Bendix switch. Thanks 

Mark Jones (N886MJ)
Wales, WI  USA 
E-mail me at flyk...@wi.rr.com
Visit my NEW
KR-2S CorvAIRCRAFT web site at www.flykr2s.com

KR> Ignition Switch

[VIRGIL N SALISBURY]

Battery only needed in start. That switch GROUNDS in the L R
BOTH, Virg

On Thu, 5 Jan 2006 20:14:33 -0600 "Mark Jones" 
writes:
> I have recently acquired a brand new Bendix OFF-R-L-BOTH-START 
> ignition switch part number 10-357210-1. I want to use this switch 
> to operate my two coils independently as R or L and have the ability 
> to run BOTH just as you would a mag set up. I was just bench testing 
> the switch with it hooked to a battery. Using a test light, the 
> starter position worked but I could not get the R-L-BOTH positions 
> to work. Is there some magic to a Bendix switch that I am 
> overlooking? Tony Bingelis' book "Firewall Forward" shows the wiring 
> diagram but that is basically all it says about it. Any help would 
> be appreciated as I would like to get rid of the cheap switch I am 
> currently using and use this Bendix switch. Thanks 
> 
> Mark Jones (N886MJ)
> Wales, WI  USA 
> E-mail me at flyk...@wi.rr.com
> Visit my NEW
> KR-2S CorvAIRCRAFT web site at www.flykr2s.com
> 
> 
> ___
> Search the KRnet Archives at 
> http://www.maddyhome.com/krsrch/index.jsp
> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
> please see other KRnet info at http://www.krnet.org/info.html
> 
> 


Virgil N. Salisbury - AMSOIL
www.lubedealer.com/salisbury
Miami ,Fl

KR> Ignition Switch

[Robert L. Stone]

Mark,
 Have you checked to see if the L & R terminals have a separate ground, 
or does the entire switch ground through the mount for all circuits.  Also 
check to see if the two coils require grounding.  Just some of my thoughts.

Bob Stone, Harker Heights, Tx
rsto...@hot.rr.com


- Original Message - 
From: "VIRGIL N SALISBURY" <virg...@juno.com>
To: <kr...@mylist.net>
Sent: Friday, January 06, 2006 8:18 AM
Subject: Re: KR> Ignition Switch


>Battery only needed in start. That switch GROUNDS in the L R
> BOTH, Virg
>
> On Thu, 5 Jan 2006 20:14:33 -0600 "Mark Jones" <flyk...@wi.rr.com>
> writes:
>> I have recently acquired a brand new Bendix OFF-R-L-BOTH-START
>> ignition switch part number 10-357210-1. I want to use this switch
>> to operate my two coils independently as R or L and have the ability
>> to run BOTH just as you would a mag set up. I was just bench testing
>> the switch with it hooked to a battery. Using a test light, the
>> starter position worked but I could not get the R-L-BOTH positions
>> to work. Is there some magic to a Bendix switch that I am
>> overlooking? Tony Bingelis' book "Firewall Forward" shows the wiring
>> diagram but that is basically all it says about it. Any help would
>> be appreciated as I would like to get rid of the cheap switch I am
>> currently using and use this Bendix switch. Thanks
>>
>> Mark Jones (N886MJ)
>> Wales, WI  USA
>> E-mail me at flyk...@wi.rr.com
>> Visit my NEW
>> KR-2S CorvAIRCRAFT web site at www.flykr2s.com
>>
>>
>> ___
>> Search the KRnet Archives at
>> http://www.maddyhome.com/krsrch/index.jsp
>> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
>> please see other KRnet info at http://www.krnet.org/info.html
>>
>>
>
>
> Virgil N. Salisbury - AMSOIL
> www.lubedealer.com/salisbury
> Miami ,Fl
>
> ___
> Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp
> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
> please see other KRnet info at http://www.krnet.org/info.html
>