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teamgrumman(at)yahoo.com
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 Posted: Sun May 13, 2012 11:08 am Post subject: ElectroAir |
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Barry,
The ElectroAir starts at 0 degrees BTDC. At 400 rpm it advances to 7 degrees. By 600 rpm, it's at 25 degrees BTDC.
The ElectroAir is NOT a CDI. It is not just an add-on to the basic magneto. It's the same system used on distributorless ignition systems in cars.
• The biggest difference is the Electroair uses one common coil instead of one coil per plug.
The unit that replaces the mag is similar to the magnetic pickup on the cam (or crank) on cars.
• Just like in a car, it begins it's timing sequence at 0 BTDC.
• There is no adjustment inside any box.
• There is nothing to rub or wear out.
• The only moving part is a 60 tooth wheel inside the unit used in place of right mag.
The DIS, just like in your car, requires that the engine go through one complete ignition sequence (2 revolutions) before it knows where it is.
The backfiring was due to this learning curve. Following the instructions in the install manual, there will be a toggle that turns the unit off and on.
• The coil is not in that loop. The coil stays hot. Two circuit breakers. Two circuits.
• You will not get a backfire unless you intentionally turn of both left and right and then turn one or the other on.
Starting is done on both mags since they are both at 0 BTDC.
Mag drop is tested by shutting off the Electroair with the toggle (this tests the left mag): 80 rpm drop
Electroair turned back on. No backfire.
Switch to Right Mag (this shorts the left mag and tests the Electroair): No noticeable drop in rpm.
=============
From: FLYaDIVE <flyadive(at)gmail.com (flyadive(at)gmail.com)>
To: grumman-gang <grumman-gang(at)lists.xmission.com (grumman-gang(at)lists.xmission.com)>
Sent: Sun, May 13, 2012 8:38 am
Subject: Re: Electroair EIS-41000
| Quote: | Lawrence:
I do not know if there is a difference between the Experimental version and
the STC version but with the Experimental, STARTING is only done on the
Mag, the Impulse Mag and then you switch on the CDI. There is a 6
Deg diffidence in timing with the CDI and that is adjustable - Which may be
out of timing on your engine. I mention this because I just came across a
problem where the adjustment which is inside the the CDI aluminum box was
out of timing. The electronic adjustment is held in position by friction
of a rubber pad. Over time and temperature and swapping engines the
adjustment was out. We did not get backfiring but we did see a drop in MP
at altitude of 8000' and above, more so than before, ask E.A. about this.
Barry
"Chop'd Liver" |
[quote][b]
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BARRY CHECK 6
Joined: 15 Mar 2011
Posts: 738
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| Posted: Fri May 25, 2012 1:35 am Post subject: ElectroAir |
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Hi Gary:
I don't want you to think I left you hanging out there, I was away for a while.
Here are pictures of the 'silver' box (aluminum). The newer certified units must have changed to black. See picture # 001
As I mentioned, under the box are the two adjustments. But, before you go there look at the underside of the box.
You will notice two slots, one of the slots has a foam rubber insert.
This inset presses up against the adjustments and is used to hold them from moving. See picture # 010 & 011
On Sun, May 13, 2012 at 3:06 PM, Gary Vogt <teamgrumman(at)yahoo.com (teamgrumman(at)yahoo.com)> wrote:
Barry,
The unit that replaces the mag is similar to the magnetic pickup on the cam (or crank) on cars.
• Just like in a car, it begins it's timing sequence at 0 BTDC.
• There is no adjustment inside any box.
[Barry] - See above - These are the adjustments. They are also called out in the manual. See picture # 010 & 011
• There is nothing to rub or wear out.
[Barry] – Well that is dependent on if you want to consider vibration on the adjustments.
And that is why the rubber presses against the two adjustment knobs. See picture# 010 & 011
• The only moving part is a 60 tooth wheel inside the unit used in place of right mag.
The DIS, just like in your car, requires that the engine go through one complete ignition sequence (2 revolutions) before it knows where it is.
The backfiring was due to this learning curve. Following the instructions in the install manual, there will be a toggle that turns the unit off and on.
• The coil is not in that loop. The coil stays hot. Two circuit breakers. Two circuits.
• You will not get a backfire unless you intentionally turn of both left and right and then turn one or the other on.
Starting is done on both mags since they are both at 0 BTDC.
Mag drop is tested by shutting off the Electroair with the toggle (this tests the left mag): 80 rpm drop
Electroair turned back on. No backfire.
Switch to Right Mag (this shorts the left mag and tests the Electroair): No noticeable drop in rpm.
[Barry] - As stated, I have never tried starting on the EIS, since the RV6 has an Impulse Mag. Not my plane and the owner wants to start on Impulse so that is what I do.
If you need a copy of the OLD (I call it old because it is for the original experimental version) operations manual I have pictures.
Barry
| | - The Matronics TeamGrumman-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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teamgrumman(at)yahoo.com
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| Posted: Fri May 25, 2012 11:24 am Post subject: ElectroAir |
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Barry,
By, "away for awhile," are you referring to jail or rehab? Either way, glad you're back. Missed all the comments.
The certified EIS is totally different. Even the coil is different.
Gary
From: FLYaDIVE <flyadive(at)gmail.com>
To: teamgrumman-list(at)matronics.com
Sent: Friday, May 25, 2012 2:34 AM
Subject: Re: ElectroAir
Hi Gary:
I don't want you to think I left you hanging out there, I was away for a while.
Here are pictures of the 'silver' box (aluminum). The newer certified units must have changed to black. See picture # 001
As I mentioned, under the box are the two adjustments. But, before you go there look at the underside of the box.
You will notice two slots, one of the slots has a foam rubber insert.
This inset presses up against the adjustments and is used to hold them from moving. See picture # 010 & 011
On Sun, May 13, 2012 at 3:06 PM, Gary Vogt <teamgrumman(at)yahoo.com (teamgrumman(at)yahoo.com)> wrote:
Barry,
The unit that replaces the mag is similar to the magnetic pickup on the cam (or crank) on cars.
• Just like in a car, it begins it's timing sequence at 0 BTDC.
• There is no adjustment inside any box.
[Barry] - See above - These are the adjustments. They are also called out in the manual. See picture # 010 & 011
• There is nothing to rub or wear out.
[Barry] – Well that is dependent on if you want to consider vibration on the adjustments.
And that is why the rubber presses against the two adjustment knobs. See picture# 010 & 011
• The only moving part is a 60 tooth wheel inside the unit used in place of right mag.
The DIS, just like in your car, requires that the engine go through one complete ignition sequence (2 revolutions) before it knows where it is.
The backfiring was due to this learning curve. Following the instructions in the install manual, there will be a toggle that turns the unit off and on.
• The coil is not in that loop. The coil stays hot. Two circuit breakers. Two circuits.
• You will not get a backfire unless you intentionally turn of both left and right and then turn one or the other on.
Starting is done on both mags since they are both at 0 BTDC.
Mag drop is tested by shutting off the Electroair with the toggle (this tests the left mag): 80 rpm drop
Electroair turned back on. No backfire.
Switch to Right Mag (this shorts the left mag and tests the Electroair): No noticeable drop in rpm.
[Barry] - As stated, I have never tried starting on the EIS, since the RV6 has an Impulse Mag. Not my plane and the owner wants to start on Impulse so that is what I do.
If you need a copy of the OLD (I call it old because it is for the original experimental version) operations manual I have pictures.
Barry
[quote][b]
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