Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Rotax 912 Eating Ignition Modules

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List
View previous topic :: View next topic  
Author Message
Guy Buchanan



Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

PostPosted: Wed Sep 16, 2020 8:48 pm    Post subject: Rotax 912 Eating Ignition Modules Reply with quote

A friend has a 912uls in a Kitfox that seems to be eating ignition modules. He's gone through three. Yes they were all old. Yes new ones work, but we're worried that maybe his plane is producing electrical noise detrimental to the modules. We did some testing using an oscilloscope looking for voltage spikes in the ground wire during start up and shutoff. For various reasons we weren't able to capture any voltage spikes during start and stop, but did capture some very messy noise signatures while running. Picture 1 shows one module's ground wire while "open". Note +/- 30V peaks and a regular 30hz sawtooth. Picture 2 shows the same ground "grounded". We did some further testing of the input and output to the voltage regulator and those voltages appeared relatively clean. Question: is it possible the ignition module is being damaged by the voltage noise, regardless of source? Should we apply some caps to the ground wires to kill the noise?

Thanks,

Guy Buchanan
gebuchanan(at)cox.net


- The Matronics AeroElectric-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?AeroElectric-List



LabNation_Screenshot2.png
 Description:
Rotax Ignition Module Ground Wire, Ground "grounded".
 Filesize:  197.99 KB
 Viewed:  950 Time(s)

LabNation_Screenshot2.png



LabNation_Screenshot0.png
 Description:
Rotax Ignition Module Ground Wire, Ground "open".
 Filesize:  213.21 KB
 Viewed:  950 Time(s)

LabNation_Screenshot0.png



_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too.
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group