---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Thu 06/14/12: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:42 AM - Re: Re: exhaust system modification (Lynn Matteson) 2. 06:16 AM - Heat muffs (BobbyPaulk@comcast.net) 3. 06:23 AM - Re: Heat muffs (Carl Meek) 4. 06:29 AM - VP Props on 3300 (Carl Meek) ________________________________ Message 1 _____________________________________ Time: 03:42:29 AM PST US From: Lynn Matteson Subject: Re: JabiruEngine-List: Re: exhaust system modification I built a pair of muffs for a friends' 3300 in his Waiex. I made the front "bulkhead" for the muff behind all the factory welds so no chance of a leaky weld admitting CO into the cabin. Making that bulkhead was a BITCH! It involved cutting a 3-lobe hole into a piece of stainless steel, and cutting and fitting, cutting and fitting until it finally fit. I don't know how well they worked, because another person suggested that they might be the reason that his engine...brand new and not broken in yet... was overheating (the jury is still out on that call), so he took them off. But here are pictures of what I did. Lynn Matteson Kitfox IV Speedster, taildragger Jabiru 2200, #2062 Prince prop 64 x 30, P-tip Electroair direct-fire ignition system Rotec TBI-40 injection (sleeved to 36mm) Status: flying with 1285 hrs... (since 3-27-2006) On Jun 13, 2012, at 8:57 AM, Carl Meek wrote: > > > While are on the topic of heat muffs, does anyone know where I can > buy one > (or two!) for a Jabiru 3300? > I've not found a supplier who has them. > > Thanks, > -Carl. ________________________________ Message 2 _____________________________________ Time: 06:16:48 AM PST US From: BobbyPaulk@comcast.net Subject: JabiruEngine-List: Heat muffs List Please be very careful of anything that will introduce Carbon Monoxide into the cockpit. The Jab 3300 on my airplane has 6 built in leaks at the joints between the pipes and muffler. It was very hard to seal the firewall positively against leaks. Even one small leak can be disastrous. In straight and level flight I did not have a problem BUT while circling a friends hangar about 3 times ( high angle of attack and 85 MPH ) my CO card turned very black ( indicating imminent death ) and I got a terrible headache. Please be sure your connections to and from the cabin heat are sealed. I found a very small opening in the factory fast build fuselage just below the lower right engine mount on three 601's. I have since sealed the exhaust joints and firewall and had no further problem but still do not trust them not to leak. The very inexpensive CO monitor my have save me. Bobby ( age 74 ) Zodiac 601 XL "B" Jabiru 3300 S/N 1141 Sensenich 64" x 51" Prop Bing Carb 260 Main & 285 Needle Jet Status - Flying 152 hrs. Do Not Archive ________________________________ Message 3 _____________________________________ Time: 06:23:05 AM PST US Subject: Re: JabiruEngine-List: Heat muffs From: Carl Meek I have also experienced CO2 in the cockpit from leaky jab exhaust, but nothing to do with the heat muff. My plan is to use a muff that sits on a clean piece of pipe away from any welds- and then ducts uncontaminated air. From: Subject: JabiruEngine-List: Heat muffs List Please be very careful of anything that will introduce Carbon Monoxide into the cockpit. The Jab 3300 on my airplane has 6 built in leaks at the joints between the pipes and muffler. It was very hard to seal the firewall positively against leaks. Even one small leak can be disastrous. In straight and level flight I did not have a problem BUT while circling a friends hangar about 3 times ( high angle of attack and 85 MPH ) my CO card turned very black ( indicating imminent death ) and I got a terrible headache. Please be sure your connections to and from the cabin heat are sealed. I found a very small opening in the factory fast build fuselage just below the lower right engine mount on three 601's. I have since sealed the exhaust joints and firewall and had no further problem but still do not trust them not to leak. The very inexpensive CO monitor my have save me. Bobby ( age 74 ) Zodiac 601 XL "B" Jabiru 3300 S/N 1141 Sensenich 64" x 51" Prop Bing Carb 260 Main & 285 Needle Jet Status - Flying 152 hrs. Do Not Archive ________________________________ Message 4 _____________________________________ Time: 06:29:41 AM PST US Subject: JabiruEngine-List: VP Props on 3300 From: Carl Meek I'm doing some research on my Europa with Jabiru 3300 to try and improve both economy and performance. Currently my A/C does 118kias at 2850RPM burning 27 litres per hour. (at sea level) I think it can be leaned out a bit to improve the economy but we haven't tried yet. What are people's thoughts on fitting a VP Prop like Airmaster 332? I'm wondering if this would help to either improve the cruise speed, or achieve the same speed with a lower RPM=8A and achieve a shorter takeoff run too. Am I barking up the wrong tree? ------------------------------------------------------------------------------------- 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.