---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 01/30/08: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:25 AM - Re: Carb Heat with 912ULS (Gtblu) 2. 05:39 AM - Re: Throttle Cables sticking (Gilles Thesee) 3. 02:47 PM - Re: Re: Carb Heat with 912ULS (jtortho@aol.com) 4. 06:10 PM - Re: Throttle Cables sticking (Steve Hagar) 5. 06:16 PM - Re: Re: Carb Heat with 912ULS (Evan Gardiner) 6. 06:28 PM - Re: Carb Heat with 912ULS (Gtblu) 7. 07:46 PM - Re: Re: Carb Heat with 912ULS (Evan Gardiner) ________________________________ Message 1 _____________________________________ Time: 03:25:11 AM PST US Subject: RotaxEngines-List: Re: Carb Heat with 912ULS From: "Gtblu" Great post Evan. RTVd???? What is that? Presume its attached to outside of throat somehow. regards gtblu -------- Slepcev Storch 912 uls 731 hours Read this topic online here: http://forums.matronics.com/viewtopic.php?p=161313#161313 ________________________________ Message 2 _____________________________________ Time: 05:39:13 AM PST US From: Gilles Thesee Subject: Re: RotaxEngines-List: Throttle Cables sticking Rich & Sandy Schultz a crit : > others have talked about going to a solid cable .055 or .078 > SS piano wire. Relieving only on the carb throttle springs to overcome the cable friction may prove troublesome. There have been cases of flexible cables binding between trhottles and cable outer case, leaving the pilot with no option when additional power is needed, despite a perfectly running engine. One needs a positive actuation of the carb throttle arms towards the full throttle position. This is why our project has piano wires, works great. To date 400+ MCR kitplanes are flying with piano wires in place of stranded cables making them a real push-pull device, with no reported problem whatsoever. Some of them have logged more than 1000 flight hours to date. > I have some concerns about the carburetor attachment point > producing a stress crack and failing under the vibration. I am interested to > hear what others have done? > Not sure what you fear. The throttle arm cable attachment is of the swivel type. No bending there. Best regards, -- Gilles http://contrails.free.fr ________________________________ Message 3 _____________________________________ Time: 02:47:34 PM PST US Subject: Re: RotaxEngines-List: Re: Carb Heat with 912ULS From: jtortho@aol.com I believe this has been mentioned in the distant past.? The concern was it just doesn't draw enough current for an appreciable warm generation. http://www.ulparts.com/SearchResult.aspx?CategoryID=94 I once spoke to the shop, and they said "no body has complained about it not working.? The leads are a bit fragile however."? Does anybody have any experience? JIm Timoney searey 912S-doing the plumbing ________________________________________________________________________ ________________________________ Message 4 _____________________________________ Time: 06:10:22 PM PST US From: "Steve Hagar" Subject: RE: RotaxEngines-List: Throttle Cables sticking I have installed a Cessna Push pull vernier type throttle single cable up into the engine compartment. Once there, it is split into two where the normal motorcycle type cable that comes with the plane is used. Each length of these is 18 inches or less long and is easily overcome by the carberator springs. Steve Hagar A143 Mesa, AZ > [Original Message] > From: Rich & Sandy Schultz > To: > Date: 1/28/2008 10:49:46 PM > Subject: RotaxEngines-List: Throttle Cables sticking > > > > I am looking to see what others have done to prevent throttle cable bowing > of the twisted wire used in most throttle cables. I have a 914 installed on > a Europa and am having problems with one of the cables wanting to bow in the > throttle box and not allowing me to get full power. The throttle springs are > not strong enough to pull the cable and keep it in tension all the time. On > the Europa form others have talked about going to a solid cable .055 or .078 > SS piano wire. I have some concerns about the carburetor attachment point > producing a stress crack and failing under the vibration. I am interested to > hear what others have done? > > ________________________________ Message 5 _____________________________________ Time: 06:16:13 PM PST US From: "Evan Gardiner" Subject: Re: RotaxEngines-List: Re: Carb Heat with 912ULS Thanks! RTV is just a generic name for a silicone based sealant. Make sure you choose a heat resistant type - usually colored red. There are several different brands of exhaust system sealants or oil-pan gasket sealants out there that will work. Locate a part of the carb body close to the intake throat that provides a secure position to secure the temp probe. Place the probe against the carb body and apply a liberal coating of RTV over the top of the probe and the carb body to hold it in place. Leave 24 hrs. to allow the RTV to cure. Cheers, Evan Gardiner ----- Original Message ----- From: "Gtblu" Sent: Thursday, January 31, 2008 12:22 AM Subject: RotaxEngines-List: Re: Carb Heat with 912ULS > > Great post Evan. > RTVd???? What is that? Presume its attached to outside of throat somehow. > > regards gtblu > > -------- > Slepcev Storch > 912 uls 731 hours > -- ________________________________ Message 6 _____________________________________ Time: 06:28:48 PM PST US Subject: RotaxEngines-List: Re: Carb Heat with 912ULS From: "Gtblu" Good one. I've got some in the hangar. Did you put another probe onto the thermometer or did it already have two "externals". I f so what breed are they.. I have only seen indoor/outdoor with one internal probe and one extended external. -------- Slepcev Storch 912 uls 731 hours Read this topic online here: http://forums.matronics.com/viewtopic.php?p=161465#161465 ________________________________ Message 7 _____________________________________ Time: 07:46:53 PM PST US From: "Evan Gardiner" Subject: Re: RotaxEngines-List: Re: Carb Heat with 912ULS The one I used was made in China and has '2 channels in/out temp' on the front panel. Powered by a flat circular battery similar to a watch battery. The thing is that this unit (and probably most other similar products) have only one external lead so the outside temp can be read and transfered to the unit. The indoor temp is read from the units internal sensor. You need to solder a lead long enough to glue the other end of the lead to the carb body. It is a few years ago since I did this and I do not remember it being a difficult task or needing a thermocouple lead or anything fancy. But that may depend on the unit you choose. Good luck, Evan Gardiner MCR 01 ULC 413 hrs. Sent: Thursday, January 31, 2008 3:26 PM Subject: RotaxEngines-List: Re: Carb Heat with 912ULS > > Good one. I've got some in the hangar. Did you put another probe onto the > thermometer or did it already have two "externals". I f so what breed are > they.. I have only seen indoor/outdoor with one internal probe and one > extended external. > > -------- > Slepcev Storch > 912 uls 731 hours > -- ------------------------------------------------------------------------------------- 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.