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electric spikes immobilizing radio and electric VSI

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richard.holder(at)outlook
Guest

Posted: Tue Apr 22, 2014 6:39 am Post subject: electric spikes immobilizing radio and electric VSI

On 22/04/2014 13:03, Christoph Both wrote:

 	  Quote: 	
		   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

- The Matronics Europa-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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max8992

Joined: 28 Jul 2011
Posts: 142

Posted: Tue Apr 22, 2014 8:14 am Post subject: electric spikes immobilizing radio and electric VSI

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(at)free.fr

F-PMLH Europa XS_TriGear

Kit #560-2003 912ULS/AirmasterAP332 490 hours



F-PLDJ Dyn’Aéro MCR 4S 

Kit #27-2002 912ULSFR/MTProp MTV7A 1600 heures

-----Message d'origine-----

De : owner-europa-list-server(at)matronics.com

[mailto:owner-europa-list-server(at)matronics.com] De la part de Richard Holder

Envoyé : mardi 22 avril 2014 16:39

À : europa-list(at)matronics.com

Objet : Re: electric spikes immobilizing radio and electric VSI




--> <richard.holder(at)outlook.com>



On 22/04/2014 13:03, Christoph Both wrote:

 	  Quote: 	
		   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

- The Matronics Europa-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:

http://www.matronics.com/Navigator?Europa-List

_________________
Max8992
Europa XS #560 F-PMLH

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