rhtrudder Posted July 9, 2019 Posted July 9, 2019 Mates 912 won’t charge his battery, fitted new reg , have no current coming from the charging coils, has anybody come across this , talked to wal and he said it was rare for these to fail, can this been checked with a resistance reading across the coils , maybe a broken wire
onetrack Posted July 9, 2019 Posted July 9, 2019 rhtrudder - Yes, the charging/lighting coils need to be tested for resistance, and the wiring checked for an internal break, which is not visible. Here's a link to an excellent UK site which offers a wealth of information on Rotaxes. Scroll down to "lighting coil test". http://www.aerofixaviation.co.uk/rotaxducatidcdiignitionsystemtesting.shtml
skippydiesel Posted July 9, 2019 Posted July 9, 2019 rhtrudder - Yes, the charging/lighting coils need to be tested for resistance, and the wiring checked for an internal break, which is not visible. Here's a link to an excellent UK site which offers a wealth of information on Rotaxes. Scroll down to "lighting coil test". http://www.aerofixaviation.co.uk/rotaxducatidcdiignitionsystemtesting.shtml Great Pommy site - thanks for the reference
Kyle Communications Posted July 9, 2019 Posted July 9, 2019 Its a reasonably common thing that the coils either burn out or go open circuit. Mostly from overload especially in aircraft that have lots of glass panels with internal batteries. 1
perrynz Posted July 14, 2019 Posted July 14, 2019 I had a no-charge problem on two different aircraft. (both Rotax 912) In the first instance I found that the two yellow wires on the connector that plugs into the regulator/rectifier (wires labelled “G”) had backed out of the plug slightly, to the point where the spade connectors on those two wires were not actually connecting. After discovering that, and then pushing the spade connectors in, problem fixed. The second time time was on my latest build. In that instance, I found that the recommended mounting of the regulator/rectifier was not giving a good earth. The fix was to make up a separate earthing wire connected to a good earthing point and bingo. Two simple checks before you dig too deeply. Cheers. Perry 1 1
skippydiesel Posted July 15, 2019 Posted July 15, 2019 I had a no-charge problem on two different aircraft. (both Rotax 912) In the first instance I found that the two yellow wires on the connector that plugs into the regulator/rectifier (wires labelled “G”) had backed out of the plug slightly, to the point where the spade connectors on those two wires were not actually connecting. After discovering that, and then pushing the spade connectors in, problem fixed. The second time time was on my latest build. In that instance, I found that the recommended mounting of the regulator/rectifier was not giving a good earth. The fix was to make up a separate earthing wire connected to a good earthing point and bingo. Two simple checks before you dig too deeply. Cheers. Perry Cant agree more - 12 volt electrical systems are sooooo dependent on good continuity. The earth return is often overlooked but is essential for reliability and function. I always "run" additional earth wires and as a consequence rarely have issues. You other point, regarding connector failure, highlights the need for well secured/supported wiring, with enough "flex" where things like engine movement may be a factor.
Downunder Posted July 15, 2019 Posted July 15, 2019 In the first instance I found that the two yellow wires on the connector that plugs into the regulator/rectifier (wires labelled “G”) had backed out of the plug slightly, to the point where the spade connectors on those two wires were not actually connecting. After discovering that, and then pushing the spade connectors in, problem fixed. I have heard of some owners doing away with the plug completely and just fitting the 6.3mm spade connectors individually. That way you can "feel" how each connection fits (tight or loose).
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now