REFLECTOR: LIGHTSPEED IGNITION PROBLEM [heur]
Tom Martino
tmartino at troubleshooter.com
Sun Feb 27 16:35:33 CST 2005
Figured out what happed. One of the transistors came loose from it's heat sink and burned up. There is a small screw mounted through it, though the case with a heat sink (with fins) on the outside of the case. The screw came loose. That allowed the transistor to get hot enough to toast.
I verified it with a meter. The transited is dead shorted.
________________________________
From: reflector-bounces at tvbf.org on behalf of Scott Derrick
Sent: Sun 2/27/2005 11:19 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: LIGHTSPEED IGNITION PROBLEM [heur]
As a counter point, I have a LSI, crank mounted pickup.
Been reliable for 400+ hours and works great.. Mine is mounted on teh
firewall, cabin side on small rubber standoffs.
Scott
davedent at comcast.net wrote:
> We had two of these moduls fail on us on our Cozy IV> We found that
> first the halograph pickups failed at the aluminum plate that spins
> with the magnet. Very poorly made. Then we found the computer moduls
> fail with vibration because the components are board mounted. We had
> two components on the boards fail. Look right in the middle of the
> large coil on the board. You will find it burnt. As well smell it to
> see if you can smell anything burnt. This is how I found mine bad.
> They replaced them with no problem. They are not just made to take
> some of the punishment that they get.
> Also check for a short in the coax cable going to the coils.
> Disconnect at the coil and check across the B&C connector. We have
> lost every one of our cables. If you have one plug wire come loose
> during flight it can and will blow a coil or even two. It tries
> to jump the plug and it can blow the computer or the coils. If a
> direct short happens it should blow a fuse before blowing the
> computer. So look for a loose wire to the plugs as well. With his
> system there are way to many things that can go wrong. And shut down
> the whole system.
> I would never buy another one with the problems we have had. I found
> the Jeff Rose unit gave me no problems at all in my ten years plus
> that I flew them. But he don't make them for the six cylinders and
> don't sell them at all anymore.
> I will be testing the prototype for the Emag on the six cylinder units
> sometime this summer. Hopefully they work as good as they say.
>
>
> -------------- Original message --------------
>
> > No matter where I plug it in, left or right ... it trips the
> breaker. And when
> > I plug the good one into the other side ... it does NOT trip the
> breaker. So,
> > it must be the module.
> >
> > ________________________________
> >
> > From: reflector-bounces at tvbf.org on behalf of Randy Wharton
> > Sent: Sat 2/26/2005 1:08 PM
> > To: 'Velocity Aircraft Owners and Builders list'
> > Subject: RE: REFLECTOR: LIGHTSPEED IGNITION PROBLEM
> >
> >
> > The first thing I would check, Tom, is the breaker. Maybe the
> ignition module is
> > ok.
> >
> >
> > ________________________________
> >
> > From: reflector-bounces at tvbf.org
> [mailto:reflector-bounces at tvbf.org] On Behalf
> > Of Tom Martino
> > Sent: Saturday, February 26, 2005 3:06 PM
> &! gt; To: reflector at www.tvbf.org
> > Subject: REFLECTOR: LIGHTSPEED IGNITION PROBLEM
> >
> > My first major squawk came yesterday while coming in for the
> final landing of
> > the day. The left Lightspeed ignition module simply popped a
> breaker.
> >
> > I began troubleshooting today and verified that there are no
> shorts or problems
> > with the wiring. And before this the engine purred perfectly.
> >
> > Its this simple: when I plug in the left module -- it pops the
> breaker.
> >
> > This concerns me a bit, since the modules don't have but a dozen
> hours on them.
> > Has anyone ever had such a failure? For no apparent reason?
> >
> > I looked inside the module and it is as clean as a whistle ...
> no burnt traces,
> > no foreign objects, no bare wires, etc.
> >
> > I had them mounted on the cabin side of the firewall, just above
> the main spar.
> > They were not too cold, nor too hot ... and I! don't believe
> there is enough
> > vibration there to affect the solid state components ..
> >
> > BUT HEY ... SOMETHING WENT WRONG!!??
> >
> > Any ideas. I will be contacting Klaus.
> >
>
>
> ------------------------------------------------------------------------
>
> Subject:
> RE: REFLECTOR: LIGHTSPEED IGNITION PROBLEM
> From:
> "Tom Martino" <tmartino at troubleshooter.com>
> Date:
> Sat, 26 Feb 2005 20:41:23 +0000
> To:
> "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>
> To:
> "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>
>
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>
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