Today's Message Index:
----------------------
 
     1. 01:03 AM - Interrupting C/B link with engine running or stopped  ()
     2. 03:30 PM - Re: Time to buy the Rotax 912S (dcsfoto)
 
 
 

Message 1


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Time: 
01:03:09 AM PST US
Subject: 
Interrupting C/B link with engine running or stopped
      
From: 
<max.johansson@nokia.com>
      
      
      Matt, 
      
      There are several reports of damaging the rectifier-regulator unit for
      the Rotax permanent magnet generator if switching off with the engine
      still running, just like you warn. Other reports tell about damaging
      avionic equipment through overvoltage if switching off with the engine
      running. On the other hand I have done that many times without any
      adverse effect, once even at higher rpm in the air. After studying the
      schematic of the unit I have a hunch that it is the remaining charge in
      the 22mF capacitor (if fitted) that makes the regulator unit try to
      output overvoltage by firing the two bridge SCRs too early during a few
      cycles after breaking the connection between battery and control
      connection. Fortunately I have no capacitor installed, contary to the
      Rotax installation manual recommendation.
      
      best regards
      Max
      
      RE:
      
      From: "Matt Smith" <service@b-bar-daviation.com>
      Subject: RotaxEngines-List: RE: RotaxEngines-List Digest: 3 Msgs -
      02/09/07
      
      Be sure also, that you DO interrupt the circuit between C and B+ when
      the engine IS NOT RUNNING, or you will very frequently come to the
      airport to find a dead battery.
      
      Matt
      
      

Message 2


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Time: 
03:30:41 PM PST US
Subject: 
Re: Time to buy the Rotax 912S
From: 
"dcsfoto" <david@kelm.com>
      
      
      kitfox has a good price
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=94847#94847
      
      








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