---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Thu 07/06/17: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:22 PM - Advice on intermittent voltage spiking in Jab 3300 (Skyking13) 2. 01:33 PM - Re: Advice on intermittent voltage spiking in Jab 3300 (Paul Mulwitz) 3. 01:44 PM - Re: Advice on intermittent voltage spiking in Jab 3300 (Nick Otterback) 4. 01:59 PM - Re: Advice on intermittent voltage spiking in Jab 3300 (FLYaDIVE) 5. 02:06 PM - Re: Advice on intermittent voltage spiking in Jab 3300 (Skyking13) 6. 02:11 PM - Re: Advice on intermittent voltage spiking in Jab 3300 (j. davis) 7. 02:24 PM - Re: Re: Advice on intermittent voltage spiking in Jab 3300 (FLYaDIVE) 8. 02:53 PM - Re: Re: Advice on intermittent voltage spiking in Jab 3300 (Paul Mulwitz) ________________________________ Message 1 _____________________________________ Time: 01:22:44 PM PST US Subject: JabiruEngine-List: Advice on intermittent voltage spiking in Jab 3300 From: "Skyking13" After a recent catastrophic engine failure I purchased and installed a nearly new (14.6 hour) Gen 3 Jabiru 3300 engine to install in my Arion Lightning LS-1. After installation of the new engine I returned the aircraft to my home base and after about 10 minutes of flight I had a "High Volts" warning on my GRT Sport EFIS. The engine screen showed about 17.9 volts on the bus and battery. I didn't experience any other problems and landed uneventfully. I then swapped the voltage regulator that was on the aircraft with the one that came with the Jabiru 3300 (same make/model regulator). I was certain that I matched the connections that existed prior to the engine swap when exchanging the regulators. I performed several additional flights testing the new engine and adjusting the prop for best performance but still had some recurring instances of "High Volts". Some of those occurrences happen intermittently during flight and sometimes the "High Volts" light and warnings happen right after takeoff and remain on until power is reduced for landing. Volts seem ok at idle at about 14 but go as high as 18 volts when the warning is illuminated. I have to confess to having little understanding of wiring, multi testers, and the magic of aircraft electrical systems. What may be causing this occasionally happening problem with my electrical system. I've checks connections again and again. Thanks, Captain Bob -------- Blue Skies & Tailwinds, Captain Bob Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470734#470734 ________________________________ Message 2 _____________________________________ Time: 01:33:44 PM PST US Subject: Re: JabiruEngine-List: Advice on intermittent voltage spiking in Jab 3300 From: Paul Mulwitz Hi Bob, One idea that comes to mind is you don't have your engine electrically bonded to your airframe. On mine this is accomplished by a large copper braid connected from the engine to the single ground point for the whole aircraft which is on the firewall. The braid is connected with significant slack so the vibrations from the engine don't try to break the bond wire or shake the firewall. Paul Camas, WA Zodiac XL, Jab 3300 On 7/6/2017 1:22 PM, Skyking13 wrote: > > After a recent catastrophic engine failure I purchased and installed a nearly new (14.6 hour) Gen 3 Jabiru 3300 engine to install in my Arion Lightning LS-1. After installation of the new engine I returned the aircraft to my home base and after about 10 minutes of flight I had a "High Volts" warning on my GRT Sport EFIS. The engine screen showed about 17.9 volts on the bus and battery. > I didn't experience any other problems and landed uneventfully. I then swapped the voltage regulator that was on the aircraft with the one that came with the Jabiru 3300 (same make/model regulator). I was certain that I matched the connections that existed prior to the engine swap when exchanging the regulators. I performed several additional flights testing the new engine and adjusting the prop for best performance but still had some recurring instances of "High Volts". Some of those occurrences happen intermittently during flight and sometimes the "High Volts" light and warnings happen right after takeoff and remain on until power is reduced for landing. Volts seem ok at idle at about 14 but go as high as 18 volts when the warning is illuminated. > I have to confess to having little understanding of wiring, multi testers, and the magic of aircraft electrical systems. > What may be causing this occasionally happening problem with my electrical system. I've checks connections again and again. > Thanks, Captain Bob > > -------- > Blue Skies & Tailwinds, > Captain Bob > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=470734#470734 > > ________________________________ Message 3 _____________________________________ Time: 01:44:58 PM PST US From: Nick Otterback Subject: RE: JabiruEngine-List: Advice on intermittent voltage spiking in Jab 3300 The engine is grounded to the Airframe with a 4gauge welding cable. That ground point is grounded to the main ground buss for the entire aircraft with another 4 gauge welding cable. More than sufficient for the job. Nick Otterback Arion Aircraft LLC General Manager 9316801781 nick@flylightning.net Open Mon- Friday 8am-5pm -----Original Message----- From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Paul Mulwitz Sent: Thursday, July 06, 2017 3:33 PM Subject: Re: JabiruEngine-List: Advice on intermittent voltage spiking in Jab 3300 Hi Bob, One idea that comes to mind is you don't have your engine electrically bonded to your airframe. On mine this is accomplished by a large copper braid connected from the engine to the single ground point for the whole aircraft which is on the firewall. The braid is connected with significant slack so the vibrations from the engine don't try to break the bond wire or shake the firewall. Paul Camas, WA Zodiac XL, Jab 3300 On 7/6/2017 1:22 PM, Skyking13 wrote: > > After a recent catastrophic engine failure I purchased and installed a nearly new (14.6 hour) Gen 3 Jabiru 3300 engine to install in my Arion Lightning LS-1. After installation of the new engine I returned the aircraft to my home base and after about 10 minutes of flight I had a "High Volts" warning on my GRT Sport EFIS. The engine screen showed about 17.9 volts on the bus and battery. > I didn't experience any other problems and landed uneventfully. I then swapped the voltage regulator that was on the aircraft with the one that came with the Jabiru 3300 (same make/model regulator). I was certain that I matched the connections that existed prior to the engine swap when exchanging the regulators. I performed several additional flights testing the new engine and adjusting the prop for best performance but still had some recurring instances of "High Volts". Some of those occurrences happen intermittently during flight and sometimes the "High Volts" light and warnings happen right after takeoff and remain on until power is reduced for landing. Volts seem ok at idle at about 14 but go as high as 18 volts when the warning is illuminated. > I have to confess to having little understanding of wiring, multi testers, and the magic of aircraft electrical systems. > What may be causing this occasionally happening problem with my electrical system. I've checks connections again and again. > Thanks, Captain Bob > > -------- > Blue Skies & Tailwinds, > Captain Bob > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=470734#470734 > > ________________________________ Message 4 _____________________________________ Time: 01:59:36 PM PST US From: FLYaDIVE Subject: Re: JabiruEngine-List: Advice on intermittent voltage spiking in Jab 3300 Bob: Working backwards... Where does the voltage come from? The Alternator! So, start there. Bad brushes will cause both high current and voltage spikes. Do you / Your plane have any OverVoltage protection circuits other than what is built into the ACU? If it does - REMOVE THEM. Check the resistance of your FIELD circuit on the Alternator. It should read no more than 4 ohms. Check the resistance of the wire going to the Field circuit from the ACU to the Alt. Should read ZERO ohms. ANY resistance there will increase the output of the Alt. REMOVE the screws and Star Lock Washers on the ACU, GROUND and ALT. Wire brush the connections and install NEW Star Lock washers. There are other tricks for checking the ACU, but these are the basic steps. Let's eliminate them firt. Barry On Thu, Jul 6, 2017 at 4:22 PM, Skyking13 wrote: > robertkperry@gmail.com> > > After a recent catastrophic engine failure I purchased and installed a > nearly new (14.6 hour) Gen 3 Jabiru 3300 engine to install in my Arion > Lightning LS-1. After installation of the new engine I returned the > aircraft to my home base and after about 10 minutes of flight I had a "High > Volts" warning on my GRT Sport EFIS. The engine screen showed about 17.9 > volts on the bus and battery. > I didn't experience any other problems and landed uneventfully. I then > swapped the voltage regulator that was on the aircraft with the one that > came with the Jabiru 3300 (same make/model regulator). I was certain that I > matched the connections that existed prior to the engine swap when > exchanging the regulators. I performed several additional flights testing > the new engine and adjusting the prop for best performance but still had > some recurring instances of "High Volts". Some of those occurrences happen > intermittently during flight and sometimes the "High Volts" light and > warnings happen right after takeoff and remain on until power is reduced > for landing. Volts seem ok at idle at about 14 but go as high as 18 volts > when the warning is illuminated. > I have to confess to having little understanding of wiring, multi testers, > and the magic of aircraft electrical systems. > What may be causing this occasionally happening problem with my electrical > system. I've checks connections again and again. > Thanks, Captain Bob > > -------- > Blue Skies & Tailwinds, > Captain Bob > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=470734#470734 > > ________________________________ Message 5 _____________________________________ Time: 02:06:59 PM PST US Subject: JabiruEngine-List: Re: Advice on intermittent voltage spiking in Jab 3300 From: "Skyking13" Barry, Thanks for the quick reply. Although I'll have to talk to some others who actually can translate much of what you've said, the Jabiru 3300 doesn't have a regular alternator, but something with magnets wound into the rear flywheel of the engine with two white wires that are connected to the voltage regulator. I don't think there are any brushes. -------- Blue Skies & Tailwinds, Captain Bob Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470739#470739 ________________________________ Message 6 _____________________________________ Time: 02:11:42 PM PST US From: "j. davis" Subject: Re: JabiruEngine-List: Advice on intermittent voltage spiking in Jab 3300 All good suggestions, but don't think he's using an aftermarket alternator with brushes. Polly standard Jabiru stator dynamo. On Jul 6, 2017 14:01, "FLYaDIVE" wrote: > Bob: > > Working backwards... Where does the voltage come from? The Alternator! > So, start there. > Bad brushes will cause both high current and voltage spikes. > Do you / Your plane have any OverVoltage protection circuits other than > what is built into the ACU? > If it does - REMOVE THEM. > Check the resistance of your FIELD circuit on the Alternator. It should > read no more than 4 ohms. > Check the resistance of the wire going to the Field circuit from the ACU > to the Alt. Should read ZERO ohms. > ANY resistance there will increase the output of the Alt. > REMOVE the screws and Star Lock Washers on the ACU, GROUND and ALT. Wire > brush the connections and install NEW Star Lock washers. > There are other tricks for checking the ACU, but these are the basic > steps. Let's eliminate them firt. > > Barry > > > On Thu, Jul 6, 2017 at 4:22 PM, Skyking13 wrote: > >> robertkperry@gmail.com> >> >> After a recent catastrophic engine failure I purchased and installed a >> nearly new (14.6 hour) Gen 3 Jabiru 3300 engine to install in my Arion >> Lightning LS-1. After installation of the new engine I returned the >> aircraft to my home base and after about 10 minutes of flight I had a "High >> Volts" warning on my GRT Sport EFIS. The engine screen showed about 17.9 >> volts on the bus and battery. >> I didn't experience any other problems and landed uneventfully. I then >> swapped the voltage regulator that was on the aircraft with the one that >> came with the Jabiru 3300 (same make/model regulator). I was certain that I >> matched the connections that existed prior to the engine swap when >> exchanging the regulators. I performed several additional flights testing >> the new engine and adjusting the prop for best performance but still had >> some recurring instances of "High Volts". Some of those occurrences happen >> intermittently during flight and sometimes the "High Volts" light and >> warnings happen right after takeoff and remain on until power is reduced >> for landing. Volts seem ok at idle at about 14 but go as high as 18 volts >> when the warning is illuminated. >> I have to confess to having little understanding of wiring, multi >> testers, and the magic of aircraft electrical systems. >> What may be causing this occasionally happening problem with my >> electrical system. I've checks connections again and again. >> Thanks, Captain Bob >> >> -------- >> Blue Skies & Tailwinds, >> Captain Bob >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=470734#470734 >> >> >> >> >> >> >> =================================== >> - >> ruEngine-List" rel="noreferrer" target="_blank">http://www.matronics.com/ >> Navigator?JabiruEngine-List >> =================================== >> FORUMS - >> eferrer" target="_blank">http://forums.matronics.com >> =================================== >> WIKI - >> errer" target="_blank">http://wiki.matronics.com >> =================================== >> b Site - >> -Matt Dralle, List Admin. >> rel="noreferrer" target="_blank">http://www.matronics.com/contribution >> =================================== >> >> >> >> > ________________________________ Message 7 _____________________________________ Time: 02:24:54 PM PST US From: FLYaDIVE Subject: Re: JabiruEngine-List: Re: Advice on intermittent voltage spiking in Jab 3300 OUCH!!!! Sorry Bob ;-( And I guess installing a separate belt or direct driven alternator would be quite difficult? Can you supply me with schematic of the alternator and electrical system? I should be able to identify the problem. BUT!!! If the only problem is overvoltage the cure should be easy... I am an EE & ME. Barry On Thu, Jul 6, 2017 at 5:06 PM, Skyking13 wrote: > robertkperry@gmail.com> > > Barry, > Thanks for the quick reply. Although I'll have to talk to some others who > actually can translate much of what you've said, the Jabiru 3300 doesn't > have a regular alternator, but something with magnets wound into the rear > flywheel of the engine with two white wires that are connected to the > voltage regulator. > I don't think there are any brushes. > > -------- > Blue Skies & Tailwinds, > Captain Bob > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=470739#470739 > > ________________________________ Message 8 _____________________________________ Time: 02:53:03 PM PST US Subject: Re: JabiruEngine-List: Re: Advice on intermittent voltage spiking in Jab 3300 From: Paul Mulwitz I think the magnets and pickup you mentioned are not the alternator but rather the ignition system. The wires from the pickups shouldn't go to the voltage regulator (I think) but should connect eventually to the distributors and spark plugs. I can't remember where the electronics live in the ignition system but I don't think it is the voltage regulator which is part of a different system entirely. I think the alternator on the Jabiru 3300 is inside the bright aluminum frame work on the back of the engine. Paul On 7/6/2017 2:24 PM, FLYaDIVE wrote: > Thanks for the quick reply. Although I'll have to talk to some others > who actually can translate much of what you've said, the Jabiru 3300 > doesn't have a regular alternator, but something with magnets wound > into the rear flywheel of the engine with two white wires that are > connected to the voltage regulator. > I don't think there are any brushes. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.