---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Tue 11/16/21: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:43 AM - Re: Noisy cockpit (n7188u) 2. 07:50 AM - Re: Re: Noisy cockpit (Bud Yerly) 3. 12:20 PM - Re: Oil temperature issue during climb (HB-YNK) 4. 12:47 PM - Re: Re: Oil temperature issue during climb (Bud Yerly) 5. 04:20 PM - Re: Oil temperature issue during climb (n7188u) ________________________________ Message 1 _____________________________________ Time: 06:43:01 AM PST US Subject: Europa-List: Re: Noisy cockpit From: "n7188u" Great reply Bud. Very detailed as always. I will create a checklist and go through the checkpoints you outline. A few notes based on preliminary reading of your message but first one question: What do you mean by "should be able to read the serial number at idle and fuzzy up to 4000. After 4000 the uncowled engine is hard to read." 1.- I have zero insulation inside. No carpet, nothing on the firewall, noting on the sides. Airplane not painted but quite slippery based on high cruise speeds (130-140 knts). Airplane is indeed noisy at my high cruise speeds. 2.- I don't have the intake plenum on the engine. Just good old fashion cone K&N filters. I did that to keep the airplane light on the nose. I was planning to install the plenum after flying the airplane a little but the performance is so spectacular as it is I decided to leave it alone. I do know that intake noise can be high in the two stroke Rotaxes. 3.- Engine feels silky smooth at the ground when doing runup at 4000 RPM. 4.- Prop not static balanced since the dynamic balance (with spinner) is almost dead on. Tweaked it to made it better though. 5.- My spinner is off according to what people tell me. Have not fixed that but it is a light DUC CF one. 6.- Checked blade pitch with a laser tool I made. Will check track though. 7.- I do have a buzzing tach needle and my "used" altimeter wobbles up and down around 100'. 8.- The muffler used to touch the top of the cooling tunnel but fixed that. No evidence of interference. 9.- My IAS at low altitude is always at 130-140 knts or so yes that can make it noisy (CAS is a little lower than that) My engine: Pulled out of a school CTLS because it reached TBO. Rebuilt (not overhauled but completely torn apart) by an iRMT Repair Center in Canada. The owner is an iRMT instructor. Confirmed with Rob Seaton at Rotech that the place is legit before buying the engine. No modifications. All stock. New CKT muffler. I did have a few issues with the engine (needed new ignition module and had to do some work on the carbs). But it is running good and strong. Best Regards, Chris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=504448#504448 ________________________________ Message 2 _____________________________________ Time: 07:50:28 AM PST US From: Bud Yerly Subject: RE: Europa-List: Re: Noisy cockpit Answers in Red: What do you mean by "should be able to read the serial number at idle and f uzzy up to 4000. After 4000 the uncowled engine is hard to read." See 4 below. 1.- I have zero insulation inside. No carpet, nothing on the firewall, noti ng on the sides. Airplane not painted but quite slippery based on high crui se speeds (130-140 knts). Airplane is indeed noisy at my high cruise speeds .. No interior means no sound deadening. Never just look at speed. Get the p lane filled and painted. You will notice a difference, even in handling. 2.- I don't have the intake plenum on the engine. Just good old fashion con e K&N filters. I did that to keep the airplane light on the nose. I was pla nning to install the plenum after flying the airplane a little but the perf ormance is so spectacular as it is I decided to leave it alone. I do know t hat intake noise can be high in the two stroke Rotaxes. In my opinion you are sucking hot air into the engine and with the XS cowl there is not as much negative pressure in the cowl. The Bings don=92t do r am air well but the inlet plenum is necessary for the best MP to run the 91 2S (ULS is the same, it just means it is the uncertified =93Ultralight=94 engine). Cold air plenums work. Spectacular in relation to what is always subjective. Air speed calibrations bring home the actual performance. 3.- Engine feels silky smooth at the ground when doing runup at 4000 RPM. That is good. But look on top of the ignition modules. There you will see the part number. That should be readable with the engine running for a pe rfect tune. Most folks find even the out of balance Rotax smooth. It shou ld be like a sewing machine. 4.- Prop not static balanced since the dynamic balance (with spinner) is al most dead on. Tweaked it to made it better though. Get the IPS on your balance down to below .07 or less. It makes a differen ce. 5.- My spinner is off according to what people tell me. Have not fixed that but it is a light DUC CF one. Duc spinners I have seen have a weak backplate. The spinner if not true it will oscillate and fatigue. Never fly with a wobbly spinner. It is alarm ing when they fail. 6.- Checked blade pitch with a laser tool I made. Will check track though. OK 7.- I do have a buzzing tach needle and my "used" altimeter wobbles up and down around 100'. Wobbles are not uncommon with a static source that has a minor leak. Depen ding on the brand, look into a rebuild and check your static system. 8.- The muffler used to touch the top of the cooling tunnel but fixed that. No evidence of interference. OK 9.- My IAS at low altitude is always at 130-140 knts or so yes that can mak e it noisy (CAS is a little lower than that) Have you calibrated your A/S ? Best Cruise for a 912ULS is about 5000 feet . Runs richer than necessary above 3500 feet or so with the Bing. My engine: Pulled out of a school CTLS because it reached TBO. Rebuilt (not overhauled but completely torn apart) by an iRMT Repair Center in Canada. The owner is an iRMT instructor. Confirmed with Rob Seaton at Rotech that t he place is legit before buying the engine. No modifications. All stock. Ne w CKT muffler. I did have a few issues with the engine (needed new ignition module and had to do some work on the carbs). But it is running good and s trong. After a top overhaul (sounds like what they did) compressions should be all even and above 75 over 80. If the engine is rough, put in new plugs befor e you do anything. The oil on the cylinders and from the storage oil fowls them. Run good gas at all times. Coils rarely get replaced on a top over haul but watch for weak spark. A bad coil iron laminated center will corrod e over time. The coil ohms out but the spark remains weak. So is one igni tion is different in its drop on the S model you may need to spend $400 for a new coil. Check the grounds also on the coil. That is about all I can suggest for now. My top three would be: COLD AIR PLENUM BALANCE THE PROP GET IT PAINTED. ITS TIME. (Interiors aren=92t cheap I=92m afraid and upho lsters cringe when they look inside. But the nice interior quiets the plan e down and does not affect serviceability if done right.) Best Regards, Bud Yerly -----Original Message----- From: owner-europa-list-server@matronics.com On Behalf Of n7188u Sent: Tuesday, November 16, 2021 9:43 AM Subject: Europa-List: Re: Noisy cockpit rb@gmail.com>> Great reply Bud. Very detailed as always. I will create a checklist and go through the checkpoints you outline. A few notes based on preliminary reading of your message but first one question: What do you mean by "should be able to read the serial number at idle and f uzzy up to 4000. After 4000 the uncowled engine is hard to read." 1.- I have zero insulation inside. No carpet, nothing on the firewall, noti ng on the sides. Airplane not painted but quite slippery based on high crui se speeds (130-140 knts). Airplane is indeed noisy at my high cruise speeds .. 2.- I don't have the intake plenum on the engine. Just good old fashion con e K&N filters. I did that to keep the airplane light on the nose. I was pla nning to install the plenum after flying the airplane a little but the perf ormance is so spectacular as it is I decided to leave it alone. I do know t hat intake noise can be high in the two stroke Rotaxes. 3.- Engine feels silky smooth at the ground when doing runup at 4000 RPM. 4.- Prop not static balanced since the dynamic balance (with spinner) is al most dead on. Tweaked it to made it better though. 5.- My spinner is off according to what people tell me. Have not fixed that but it is a light DUC CF one. 6.- Checked blade pitch with a laser tool I made. Will check track though. 7.- I do have a buzzing tach needle and my "used" altimeter wobbles up and down around 100'. 8.- The muffler used to touch the top of the cooling tunnel but fixed that. No evidence of interference. 9.- My IAS at low altitude is always at 130-140 knts or so yes that can mak e it noisy (CAS is a little lower than that) My engine: Pulled out of a school CTLS because it reached TBO. Rebuilt (not overhauled but completely torn apart) by an iRMT Repair Center in Canada. The owner is an iRMT instructor. Confirmed with Rob Seaton at Rotech that t he place is legit before buying the engine. No modifications. All stock. Ne w CKT muffler. I did have a few issues with the engine (needed new ignition module and had to do some work on the carbs). But it is running good and s trong. Best Regards, Chris Read this topic online here: https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fforums.ma tronics.com%2Fviewtopic.php%3Fp%3D504448%23504448&data=04%7C01%7C%7C1 eab1365067346198af808d9a91008a4%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0% 7C637726708611984996%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2 luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=2aP2q%2BWqhgyvE0o4f 7YpoLM0QgNsurKNDGJL8hm3DaU%3D&reserved=0 %2Fwww.matronics.com%2FNavigator%3FEuropa-List&data=04%7C01%7C%7C1eab 1365067346198af808d9a91008a4%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C6 37726708611984996%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luM zIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=zCUFQCVMJp70d8CJHzjdYa Iqx8eItKPKd356Pqv%2FnqY%3D&reserved=0 %2Fforums.matronics.com%2F&data=04%7C01%7C%7C1eab1365067346198af808d9 a91008a4%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637726708611984996%7C Unknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiL CJXVCI6Mn0%3D%7C3000&sdata=L3bwLCjZ9yut8eZGV6XBSXdEkVS%2F%2FseH5lqCRK iS9Yc%3D&reserved=0 %2Fwiki.matronics.com%2F&data=04%7C01%7C%7C1eab1365067346198af808d9a9 1008a4%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637726708611994988%7CUn known%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJ XVCI6Mn0%3D%7C3000&sdata=BVFFrl1e%2FFBIbgsPn%2FRIpD4mXWBu%2FXmpxKwBCz cSnss%3D&reserved=0 F%2Fmatronics.com%2Fcontribution&data=04%7C01%7C%7C1eab1365067346198a f808d9a91008a4%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637726708611994 988%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1 haWwiLCJXVCI6Mn0%3D%7C3000&sdata=mCWYKdKUBzqvXtI5vTFp5wB8YGUu3nT3%2FW 18758g69c%3D&reserved=0 ________________________________ Message 3 _____________________________________ Time: 12:20:32 PM PST US Subject: Europa-List: Re: Oil temperature issue during climb From: "HB-YNK" Dear all Thanks for all tips and support. Some additional information I forgot to write. In the past i had some issue with hot CHT on ground, so i wasn't able to get airborne within green arc. To solve this issue I already did this work: - get familiar with Bud's Cooling 101 - Smooth out the inside cowl - Small lip on outlet behind radiator - Sealed everything possible around radiators, just not sure how my seal is working at the interface the the cowling I will check the sensor, the thermostat and the oil tank vent lines. But does anyone have experience to fly the 914 without thermostat? @ Bud, Do you fly with an thermostat? @ Chris, do you may share a picture too? Many thanks Marcel -------- _____________________________________ Marcel Bodmer Europa XS Monowheel HB-YNK Read this topic online here: http://forums.matronics.com/viewtopic.php?p=504452#504452 ________________________________ Message 4 _____________________________________ Time: 12:47:10 PM PST US From: Bud Yerly Subject: RE: Europa-List: Re: Oil temperature issue during climb Marcel. I fly without the oil thermostat all the time. I sit for about 2 minutes longer waiting for the temps hitting 100F. Climbing to 10000 I just hit 200F on the oil and 245 on the HT. Bud Yerly -----Original Message----- From: owner-europa-list-server@matronics.com On Behalf Of HB-YNK Sent: Tuesday, November 16, 2021 3:20 PM Subject: Europa-List: Re: Oil temperature issue during climb Dear all Thanks for all tips and support. Some additional information I forgot to write. In the past i had some issue with hot CHT on ground, so i wasn't able to get airborne within green arc. To solve this issue I already did this work: - get familiar with Bud's Cooling 101 - Smooth out the inside cowl - Small lip on outlet behind radiator - Sealed everything possible around radiators, just not sure how my seal is working at the interface the the cowling I will check the sensor, the thermostat and the oil tank vent lines. But does anyone have experience to fly the 914 without thermostat? @ Bud, Do you fly with an thermostat? @ Chris, do you may share a picture too? Many thanks Marcel -------- _____________________________________ Marcel Bodmer Europa XS Monowheel HB-YNK Read this topic online here: https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fforums.matronics.com%2Fviewtopic.php%3Fp%3D504452%23504452&data=04%7C01%7C%7Ca838277733f748d9a06f08d9a93f119b%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637726910658870515%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3tKzP692v4O2ohKrkq7Zwa4f1nu%2FIdwzsOvdwpZsnA0%3D&reserved=0 ________________________________ Message 5 _____________________________________ Time: 04:20:13 PM PST US Subject: Europa-List: Re: Oil temperature issue during climb From: "n7188u" Marcel, unfortunatedly I couldn't find a good picture of the baffling on the radiators and the difusers. The oil cooler has two baffles on the sides (that I do show a picture of) and one on the bottom that is flexible to bend and provide seal pressure against the cowling bottom. If I remember to take pictures of the existing baffles when the lower cowling is off I will. You can also see that the sides of the water cooler have been filled with firewall material and black RTV. The black RTB is bonded to the firewall material but not the duct for easy removal. An important one is at the bottom of the water cooler and butts against the oil cooler front. Sealing that large gap between the two. So the high pressure in front of the coolers forces air through the lower part of the oil cooler and the entire water cooler. Since the oil cooler is not sealed at the top, all the air coming out of the water cooler has a low pressure area to exit unrestricted. This eliminates the flow over the upper part of the oil cooler but that is OK in my installation as the oil seems to remain cooler than the coolant. You could reverse it (put in in the upper edge of the oil cooler and butt against the rear of the water cooler). This would force more air through the oil cooler and less through the water one. This may not apply to your case but it works for me as my oil stays cool. Chris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=504454#504454 Attachments: http://forums.matronics.com//files/chris_duct_2_210.jpg http://forums.matronics.com//files/chris_duct_878.jpg http://forums.matronics.com//files/chris_europa_firewall_140.jpg ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-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/europa-list Browse Digests http://www.matronics.com/digest/europa-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.