Pullstart 64,384 #76 Posted February 22 Come to think of airflow, I am not sure if I make the holes larger if I’ll get the volume I need or if the bigger blower will create increased pressure to make the fire happy. Share this post Link to post Share on other sites
Ed Kennell 40,266 #77 Posted February 22 1 hour ago, Pullstart said: the volume I need or if the bigger blower It's probably a fine line between sufficient air to create an efficient combustion vs maintaining a negative pressure in the exhaust flue pipe to insure no gas escapes. I have seen outside exhaust fans to insure safe gas removal. Just thinking SAFETY 3 Share this post Link to post Share on other sites
Pullstart 64,384 #78 Posted February 22 13 minutes ago, Ed Kennell said: It's probably a fine line between sufficient air to create an efficient combustion vs maintaining a negative pressure in the exhaust flue pipe to insure no gas escapes. I have seen outside exhaust fans to insure safe gas removal. Just thinking SAFETY It did take a bit to get the flue hot. Once it was though, draft was not an issue. Also, my shop is not very tight. Plenty of fresh air available for combustion and draft. I also played with baffles in the horizontal flue pipe. It did not pay off and I saw smoke seep from the pipe joints. I removed them right away and have no intention to place them back in any time soon. I’LL ALSO MENTION, the doors of the shop were open during operation, to allow the smoke to clear, to allow some failure and insure my safety. It still got a bit hazy in there. I made sure to keep myself in fresh air (door openings or outside) while not tinkering with the setup. 2 Share this post Link to post Share on other sites
Pullstart 64,384 #79 Posted February 22 I also took a moment to RTV Red (650 degrees) the gaps in the exhaust pipe. I might even hit them with some high temp pellet stove tape. 1 Share this post Link to post Share on other sites
Pullstart 64,384 #82 Posted February 25 I’ve been playing with this thing, and think the blower just can’t overcome the vent length. It’s a thing, and I knew it might be. I don’t want a fan on the exhaust pulling, for the concern it might get sooted up. I think I need to pull a length of pipe out of the system, though I don’t want to. That’s a cost of trial and error. Other than the masses of people telling me I need this, watching this quick video of the burner working outside reminds me how good it was with vent out of the playing field. 2 Share this post Link to post Share on other sites
Pullstart 64,384 #83 Posted February 25 Shortening the horizontal flue helped increase temps greatly! I’m not sold on the whole design, but it’s getting better. 2 1 Share this post Link to post Share on other sites
Pullstart 64,384 #84 Posted February 25 I just shut it down. Once the fire was out, my rotor stack was close to 950 degrees without fire. 2 3 Share this post Link to post Share on other sites
ri702bill 8,914 #85 Posted February 25 4 hours ago, Pullstart said: I just shut it down. Once the fire was out, my rotor stack was close to 950 degrees without fire. Time for the Marshmallows!! 1 Share this post Link to post Share on other sites
adsm08 2,559 #86 Posted February 26 5 hours ago, Pullstart said: Shortening the horizontal flue helped increase temps greatly! I’m not sold on the whole design, but it’s getting better. Well, I do love saying "I told you so". 3 Share this post Link to post Share on other sites
Pullstart 64,384 #87 Posted February 26 2 hours ago, adsm08 said: Well, I do love saying "I told you so". I didn’t doubt you, but needed proof. It looks good where it’s at Share this post Link to post Share on other sites
ri702bill 8,914 #88 Posted February 26 (edited) 7 hours ago, Pullstart said: I didn’t doubt you, but needed proof. It looks good where it’s at Some may call it " Trial & Error" Designing, but to a retired Engineer, that's just good old data collection & validation !! Rube Goldberg would be right proud of you Kevin. Edited February 26 by ri702bill 3 1 1 Share this post Link to post Share on other sites
SylvanLakeWH 27,212 #89 Posted February 26 I found this discarded flue pipe plan on @Pullstart's shop floor... 2 8 Share this post Link to post Share on other sites
Pullstart 64,384 #90 Posted February 26 Makes sense to me! 2 1 5 Share this post Link to post Share on other sites
Ed Kennell 40,266 #91 Posted February 26 No mistakes in trial and error or research and development. Just one step closer to success. 2 2 Share this post Link to post Share on other sites
ri702bill 8,914 #92 Posted February 26 2 hours ago, Ed Kennell said: No mistakes in trial and error or research and development. Just one step closer to success. Failure is what motivates one to success. 2 1 Share this post Link to post Share on other sites
kpinnc 13,491 #93 Posted February 26 6 hours ago, Ed Kennell said: No mistakes in trial and error or research and development. Just one step closer to success. ...Clearly I haven't put up enough pictures of my own adventures in fabrication. 2 2 Share this post Link to post Share on other sites
Pullstart 64,384 #96 Posted March 6 I’m starting to get somewhere! 2 Share this post Link to post Share on other sites
Blasterdad 2,999 #97 Posted March 7 Nice! You'll have those plastic wheels melted off there in no time! 3 Share this post Link to post Share on other sites
Pullstart 64,384 #98 Posted March 7 11 hours ago, Blasterdad said: Nice! You'll have those plastic wheels melted off there in no time! They started blistering the other day. I finally had to take them off. 1 1 1 Share this post Link to post Share on other sites
Pullstart 64,384 #99 Posted March 7 I finally achieved a good hot burn! It was fun to ramp this up to the point of making the entire burner system glow. 2 6 Share this post Link to post Share on other sites
wallfish 17,397 #100 Posted March 8 17 hours ago, Pullstart said: I finally achieved a good hot burn! It was fun to ramp this up to the point of making the entire burner system glow. Nice! That thing is cranking out the heat. Interesting with the oil drip feed over the top as a preheat system. Does it not burn as good or clean with the oil feeding directly into the bottom reservoir area? The only reason I ask is because it seems like the partial burn/heat of it on the way down would or might cause some more soot or smoke because it's not as clean or thorough of a burn in that area on the way down. Share this post Link to post Share on other sites
