Had the same trouble with Ducati and changed it for a Silent Hektik which is
fully compatible, throw the Ducati away and put the SH one in place and it
runs since. By far more performing and stable...
Max Cointe
mcointe@free.fr
F-PMLH Europa XS_TriGear
Kit #560-2003 912ULS/AirmasterAP332 490 hours
F-PLDJ DynAro MCR 4S
Kit #27-2002 912ULSFR/MTProp MTV7A 1600 heures
-----Message d'origine-----
De: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] De la part de Richard Holder
Envoy: mardi 22 avril 2014 16:39
: europa-list@matronics.com
Objet: Re: Europa-List: electric spikes immobilizing radio and electric VSI
--> <richard.holder@outlook.com>
On 22/04/2014 13:03, Christoph Both wrote:
> Dear Europa community:
> I am experiencing a strange electrical phenomenon:
> After engine start (Rotax 912ULS) and showing up usually at first
> higher RPM (run up or later, during cruise), my MGL V6 radio freezes.
> I first thought it is a radio problem but on the ground, engine OFF it
> works great, and for extended period of time. Frozen means frequencies
> dialed will show on LCD screen but pushing any buttons will not work
> and radio is incapacitated. It remains in this state until engine is
> OFF. I am operating a handheld, same frequency which does NOT show any
> distorted reception or TX problems while VX is frozen. The V6 does not
> RX and TX when frozen.
> I have a good set of headphones and hear no unfamiliar background
> noise either. However, I discovered that on my GRT Glass, engine
> monitor graphic analyzer, formerly drawing smooth curves for all 4 EGT
> and CHT sensor temps,all 4 parallel temp curves have now sharp steep
> triangular positive and negative spikes, approximately every second
> or so, in irregular patterns +/- and different amplitudes. At higher
> RPM the amplitudes increase, at idle they are hardly visible. But, no
> clicking or noise in the headphones.
> I have a straight forward EXP-2 Bus system which worked flawless from
> day #1 until 65 hours FT.
> What really got me confused, and the radio suspect questioned is that
> my electric VSI is now freezing as well or freezing at alarming
> altitude data display (23,000feet last time). Where is my oxygen mask?
> I have talked to ROTAX Canada but they had no clue yet.
> Just in case, I ordered a new rectifier unit and capacitor in the hope
> of remedying the problem this way. Parts have not arrived yet.
> Any ideas what the issue can be or how to trouble shoot this?
> Thanks,
> Christoph Both
> EUROPA C-GPEL
> 75+ hours, Waterville, Nova Scotia, Canada
I thought I would add my two pennyworth to this.
My Ducati failed at 175 hours.
I have an ammeter and a voltmeter. The ammeter isn't damped and the
voltmeter is.
I tried a total of four new Ducatis and every single one vibrated the
ammeter needle at 5 cycles per second, between 2 and 10 amps in the cruise.
Two of the four came from the UK - two from Lockwood.
I assume that the damped voltmeter wasn't able to show the vibrating voltage
at 5 cps, but that it was giving maybe
14 - 16 volts 5 times a second.
My original Ducati did not vibrate my ammeter needle - nor did two other
people's Ducatis. The difference was that these Ducatis were earlier models.
I beleve that they changed the circuitry, so that the problem appeared
around 2006 - although I would have to look up the date.
A digital ammeter would not have shown this vibration; I suspect that others
have no ammeter.
Anyway I bought a GR6 and it has happily run for 500 hours since then, with
no ammeter needle vibration.
The GR6 does need a few more revs to get going - 2500 - and I believe its
stated max is 16A rather than the Ducati's 19A. However as the GR6 has far
superior cooliing fins I am sure the GR6 wil be much more long-lived (I
cover that by having a spare on board - guarantees non-failure !)
Of course Schicke won't send GR6s to the USA, but there are ways round that
!
By the way the AC output from the stator can get up to 30 volts !
Richard Holder
Europa G-OWWW
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