---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Wed 05/30/18: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:44 PM - Engine Stumble on Climb Out (ggtyler) ________________________________ Message 1 _____________________________________ Time: 11:44:55 PM PST US Subject: Yak-List: Engine Stumble on Climb Out From: "ggtyler" Just a bit of excitement in the Yak 52TW today. Flight before last the engine did a hard stumble twice in succession on climb out. I immediately swung back towards the field, but once I pulled back from 2400RPM to 2100, it smoothed out. Gave it a few minutes, played with the throttle and rpm's and it did not come back. Figured it was just a fouled plug. I did a couple more hours of flying and starts/stops that day with no issues. Went up again today, and on climb out, 2400 RPM, hard stumble. Then another, and another, quickly turned back, pulled back to 2100 RPM, but the hard stumbles proceeded to keep happening. At one point, I was pretty sure it was going to quit running entirely. That 1.5 seconds or 2 seconds of stumbles in a row can feel like an eternity. It was running pretty badly, wife was in the back on her second flight ever with me. I was pretty darn stressed, so more focused on getting back on the ground safely than anything else. I did not think to do a mag check, but didn't really have time, as I had only just made pattern altitude by the time I was on downwind. I did scan through all the instruments, and all temps/pressures seemed be normal. On final, I must say, I just wanted us to be back on the ground NOW, and was getting in a bit of a hurry to get down. Realizing that stress was dictating my landing, I just kept telling myself "don't get in a hurry, hold it off, hold it off". Not my best landing ever, but not one I need to be ashamed of. I did find it hard to keep my legs from bouncing all over while taxing. Not often I get that much adrenaline pumping. Wife's a bit of a gear-head so knew everything was definitely not cool, but she stayed calm and didn't freak out. It's nice to have someone to hug after a bit of a scare. Dropped a text to Vladimir Yastremski (he does my annuals). That guy always calls me back, no matter what time of day. He's even on vacation right now. Talk about service! Diagnostics will come later, and will update here. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=480530#480530 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-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/yak-list Browse Digests http://www.matronics.com/digest/yak-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.