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Dave(at)AirCraftersLLC.co
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 Posted: Mon Jul 30, 2007 2:28 pm Post subject: Slick Start |
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Bob,
I'm installing a SlickStart (SS) on a left retard breaker mag, no impulse couplings.
We're using two locking mag switches. Customer wants to leave the right mag off for starting without the interlock to the left switch you describe.
Powering the SS via the push to start is contrary to the instructions, which have it powered from the starter feed. Problem is, I worry that the starter might generate power while spinning down, thus keeping power to the SS after the start switch is released.
If I power the SlickStart from the push to start switch, is there any chance I will damage it from high voltage due to the collapsing contactor coil? The coil has a surge diode installed.
Dave Saylor
AirCrafters LLC
140 Aviation Way
Watsonville, CA
831-722-9141
831-750-0284 CL
www.AirCraftersLLC.com
[quote][b]
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bakerocb
Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA
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| Posted: Tue Jul 31, 2007 3:37 am Post subject: Slick Start |
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7/31/2007
Hello Dave,
1) You wrote: "Problem is, I worry that the starter might generate power
while spinning down, thus keeping power to the SS after the start switch is
released."
I don't understand why you consider this a problem. Assuming that the engine
has already started running and the starter switch has been released, if the
starter run down is generating enough electricity to continue to fully
activate the SlickStart then you will just have retarded ignition from the
left mag for that brief period of time. What is the harm in that?
2) Realize that Slick SB1-06A calls for disconnection of the SS unit from
the right magneto and removal of pin #2 on SS1001 SlickStart ignition
boosters. This is the pin and wiring that would automatically ground out the
right magneto during SS unit activation to avoid the possibility of an
advanced spark coming from the right magneto.
3) SB1-06A was created because Unison felt that this connection "potentially
compromises the redundancy of the ignition system." I understand that Unison
is working on an updated version of the SlickStart.
4) Once SB1-06A is complied with your customer should realize that grounding
out the right magneto by having that magneto switched OFF during cranking is
the only sure way to ensure that he will not get advanced sparking from the
right magneto.
'OC' Says: "The best investment we can make is the effort to gather and
understand knowledge."
PS: I hope that Bob Nuckolls or other expert can comment on the rationale
behind this statement:
"17.Use either a varistor, or a diode plus Zener diode as a protective
circuit against reverse surge in the G9EB relay coil. Using a diode
alone will reduce the switching characteristics."
It came from the Precautions sheet from this web site:
http://www.omron.com/ecb/products/pdf/en_g9ea_ec.pdf
Thanks
------------------------------------------------------
Time: 03:28:45 PM PST US
From: "Dave Saylor" <Dave(at)AirCraftersLLC.com>
Subject: Slick Start
Bob,
I'm installing a SlickStart (SS) on a left retard breaker mag, no impulse
couplings.
We're using two locking mag switches. Customer wants to leave the right mag
off for starting without the interlock to the left switch you describe.
Powering the SS via the push to start is contrary to the instructions, which
have it powered from the starter feed. Problem is, I worry that the starter
might generate power while spinning down, thus keeping power to the SS after
the start switch is released.
If I power the SlickStart from the push to start switch, is there any chance
I will damage it from high voltage due to the collapsing contactor coil?
The coil has a surge diode installed.
Dave Saylor
AirCrafters LLC
140 Aviation Way
Watsonville, CA
831-722-9141
831-750-0284 CL
www.AirCraftersLLC.com
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Eric M. Jones
Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts
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