REFLECTOR: ENGINE OUT MYSTERY SOLVED

[davedent at comcast.net]

I have it in my Schematic book for the XL.  Next time out there I'll get it. 
You will need the number off the diode.  I know I put the power to the diode 
from the battery at the plus side master swt and then to the board I made 
up.  Very simple.  That is for the EFIS  that is because on XL I don't have 
the EI system.  But the same would be for each.  I'll try and remember.

I flew my plane today with new Catto blades. Smooth as silk.  But when I put 
it back in the hangar I found that a rock got picked up somewhere during 
this trip and took a good chunk out of the tip.  Talk about mad.  I didn't 
have two flights on it and got it dinged.  Boy I'm glad they are Catto 
blades.  If they were MT's I would replacing a blade.  But by the time I 
went home it was all better.  Just a light cover of red paint and it's back 
to like new.



----- Original Message ----- 
From: "Scott Derrick" <scott at tnstaafl.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Friday, August 24, 2007 9:02 PM
Subject: Re: REFLECTOR: ENGINE OUT MYSTERY SOLVED


> Dave,
>
> this sounds like Bob Knukolls recommendation.
>
> Got a wiring diagram?
>
> Scott
>
>
>> In all the cases where I had dual electronic ignition I installed an 
>> extra
>> battery that could maintain the ignition for a good 1/2 hr.  Just through
>> a
>> single swt.  The blocking diode kept it from getting to the main buss. I
>> had
>> to use it twice when I lost the alternator.  Saw the big draw and turned
>> on
>> the standby and turned off the main till close to home and then used the
>> main battery to talk to the tower to land and had plenty left to run the
>> engine.  Once on the ground shut one system down. I could have done it in
>> flight but didn't think of it either time.  I kept the small 7Ahr battery
>> charged with a blocking diode off the main buss.
>> I now use this method for my standby power to the EFIS. This difference 
>> is
>> that I leave the standby power on all the time and the EFIS take care of
>> the
>> management of it.  I wouldn't know that it even come on unless the EFIS
>> told
>> me I lost my No.1 power source.  KISS.
>> Dave
>> ----- Original Message -----
>> From: "Tom Martino" <tmartino at troubleshooter.com>
>> To: "Velocity List" <reflector at tvbf.org>
>> Sent: Tuesday, August 21, 2007 4:02 PM
>> Subject: REFLECTOR: ENGINE OUT MYSTERY SOLVED
>>
>>
>>> After close inspection ... I found the problem.
>>>
>>> First the good news ... the engine on my Velocity is perfect!  It cranks
>>> and
>>> fires up with fuel and oil pressures where they should be.
>>>
>>> The prop governor did not fail.
>>>
>>> And the is minimal airframe damage.
>>>
>>> So what went wrong?
>>>
>>> The power source for the electronic ignition went bad.
>>>
>>> I had a primary battery and secondary battery and used Wayne Lanza's
>>> "Power
>>> Guard" ... To quote his website ... "The Fail safe secondary power
>>> control".
>>>
>>> Well, this fail safe module failed and caused power interruptions to my
>>> ignition modules.
>>>
>>> As it turns out ... I would've been better off NOT to use a secondary
>>> power
>>> source and not to use Lanza's controller.  The chances of the alternator
>>> and
>>> battery going out at the same time are remote.  Even if the alternator
>>> failed ... The battery could keep the engine running for quite some
>>> time.
>>> And if you wanted a backup battery for extended power ... Simply put one
>>> in
>>> with a mechanical switch.
>>>
>>> The thing that puzzles me is that the electronic ignition is critical
>>> ...
>>> And the very unit that was supposed to preserve my spark, ended up
>>> interrupting it.
>>>
>>> I am in the process of having it diagnosed to find out where the unit
>>> failed.  But FAILED it did.
>>>
>>> Gee ... I lost almost $200,000 on this ... Think I can get my $100 back
>>> on
>>> it?
>>>
>>> Tom Martino
>>>
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>>
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>
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