---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sat 04/16/11: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:44 AM - Re: EGT/CHT combination guage (lucien) 2. 02:08 PM - Re: Re: EGT/CHT combination guage (Bob Comperini) 3. 07:30 PM - Re: Re: EGT/CHT combination guage (Jim_and_Lucy Chuk) ________________________________ Message 1 _____________________________________ Time: 07:44:16 AM PST US Subject: RotaxEngines-List: Re: EGT/CHT combination guage From: "lucien" stevlynn(at)bellsouth.net wrote: > I am looking for another hole to mount an additional flight instrument in a Kolb Firefly panel. Im considering removing the dual EGT gauge and the dual CHT gauge, and replacing with a combination EGT/CHT gauge. Am I giving up more than I really should in terms of Rotax 447 engine operation? > You should be fine, especially if your 447 is the single carb version. Just put the remaining CHT and EGT's on the hottest cylinders. If you have dual carbs, you run the (fairly low) risk of something happening to the non-monitored cylinder's carb and it not showing up as an EGT spike or dip, etc. But with a single, it'll show up on either cylinder. So IMO I say no problem.... LS -------- LS Titan II SS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=337126#337126 ________________________________ Message 2 _____________________________________ Time: 02:08:36 PM PST US Subject: Re: RotaxEngines-List: Re: EGT/CHT combination guage From: Bob Comperini I think you should have two EGT gauges. You can't mount a single prob in the correct spot and expect to monitor both cylinders. Single carb or dual carb, I believe two EGTs are important. There probably is a single gauge available that has both dual EGT and CHT in one unit -- Bob Comperini On Apr 16, 2011, at 7:39 AM, "lucien" wrote: > > > stevlynn(at)bellsouth.net wrote: >> I am looking for another hole to mount an additional flight instrument in a Kolb Firefly panel. Im considering removing the dual EGT gauge and the dual CHT gauge, and replacing with a combination EGT/CHT gauge. Am I giving up more than I really should in terms of Rotax 447 engine operation? >> > > > You should be fine, especially if your 447 is the single carb version. Just put the remaining CHT and EGT's on the hottest cylinders. If you have dual carbs, you run the (fairly low) risk of something happening to the non-monitored cylinder's carb and it not showing up as an EGT spike or dip, etc. But with a single, it'll show up on either cylinder. So IMO I say no problem.... > > LS > > -------- > LS > Titan II SS > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=337126#337126 > > > > > > > > > > ________________________________ Message 3 _____________________________________ Time: 07:30:45 PM PST US From: Jim_and_Lucy Chuk Subject: RE: RotaxEngines-List: Re: EGT/CHT combination guage Here is a solution to your problem. On my Avid Flyer with a Jabiru engine I installed a 4 position Westach switch that switches the EGT and CHT probe s from one cylinder to the next. At this time I have seperate EGT and CHT gauges=2C but I'm going to switch to a single gauge to monitor both. The we stach switch comes wired up to just do one set of 4 probes but the switch h as 2 extra conections for each cylinder position so I wired up the CHT prob es to the second set of conections and it works just fine. With your two s troke=2C you wouldn't use cylinder 3 and 4 connections at all. Take care =2C Jim Chuk > Subject: Re: RotaxEngines-List: Re: EGT/CHT combination guage > From: bob@fly-ul.com > Date: Sat=2C 16 Apr 2011 14:02:05 -0700 > To: rotaxengines-list@matronics.com > > > I think you should have two EGT gauges. You can't mount a single prob in the correct spot and expect to monitor both cylinders. Single carb or dual carb=2C I believe two EGTs are important. There probably is a single gauge available that has both dual EGT and CHT in one unit > > -- > Bob Comperini > > > On Apr 16=2C 2011=2C at 7:39 AM=2C "lucien" wr ote: > .com> > > > > > > stevlynn(at)bellsouth.net wrote: > >> I am looking for another hole to mount an additional flight instrument in a Kolb Firefly panel. I=99m considering removing the dual EGT gau ge and the dual CHT gauge=2C and replacing with a combination EGT/CHT gauge . Am I giving up more than I really should in terms of Rotax 447 engine ope ration? > >> > > > > > > You should be fine=2C especially if your 447 is the single carb version . Just put the remaining CHT and EGT's on the hottest cylinders. If you hav e dual carbs=2C you run the (fairly low) risk of something happening to the non-monitored cylinder's carb and it not showing up as an EGT spike or dip =2C etc. But with a single=2C it'll show up on either cylinder. So IMO I sa y no problem.... > > > > LS > > > > -------- > > LS > > Titan II SS > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=337126#337126 > > > > > > > > > > > > > > > > > > > > > > =========== =========== =========== =========== > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-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/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-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.