All About Overhauls - InTheHangar Ep23
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- čas přidán 8. 07. 2024
- What's a Factory Remanufactured Overhaul versus your mechanic overhauling your plane's engine? How does a Top Overhaul fit in? What exactly is happening when your engine needs an overhaul? And why do you need to run your engine aggressively after you have an overhaul or new engine? We talk to A&P/IA's John Efinger, Bill Goebel, and are joined by the experts at Superior Air Parts Bill Ross and Scott Hayes. Bill Ross has written a book on engine management and maintenance for pilots.
For information on Superior, check out www.superiorairparts.com/
Special thanks to TCN Studios studiosattcn.com/
Sponsored by Serendipitous Films s-films.com/
Something every pilot should understand and learn about.
Great video as noted previously. The bottom line here is that owning an aircraft is corrosive to your bank account.
Excellent - need more of this valuable information
. Please keep it coming!
Excellent episode 👍
my favorite episode yet.
Dan,
Really enjoyed this video, That is one very knowledgeable panel you put together there, I would love to see them again.
Great information, thank you.
Great information!
I learned so much today!
Learned a lot! Thank you
Loved the information, loved all of their knowledge. loved the mutual respect among everyone sitting at the table. Maybe not the most exciting subject but I found it very worthwhile. Thanks! If I buy a plane I want these guys helping me!!
Terry Rutherford lots of knowledge but the host guy isn’t really doing a good job playing dumb and dragging out info. Have a list of questions and specific concerns we all want to know.
great vid!
I am not an engineer but for me the key to making an engine last relatively longer and live through many overhauls is lubrication. Regular change of high grade lubricants at periods even before usually specified.
Great video, all this just highlights the antiquated technology behind aircraft engines. If this level of cost and detail was necessary for automobiles, we would still be riding horses. Need new tech and make these better.
excellent
Love videos with this level of detail and explanation. I would love to see more videos like this one and the video where John was actually checking cylinder pressures, looking for stuck valves etc.. Maybe a some videos on do it yourself maintenance for pilots or what to expect on owner assisted annuals etc.. Great work... :-)
Superb episode! Tons if things tonl learn & apply on a daily basis.
"Don't baby the engine". I like that phrase m8s ;) :)
The break in at 75% power makes sense the way he explained the piston ring expansion. My question is why was it sort of standard practice not to do the same in the automotive world?
nice!
Love that orange shirt!
Wow need to have this group together again, it was a great show.
Actually, we will have another one released in a few months!
In flight school we always liked when they needed an engine broken in. We could go on a long cross country and run it a lot harder than we normally would. Could get a longer flight in a shorter time.
What happens when you over temp ? Burn valves ?
Temp was 405 on 2 cylinders for about 10 minutes.
Jesus, watching this as an A&P I/A was about as painful as dental work.
This is my favorite video in this series! Keep these coming. Can you ask the guys this: I am a trained auto/industrial diesel technician. I want to become a full A&P (with all the letters) so I can maintain my own aircraft. Would they recommend that? Why or why not? Thanks!
Robert Rustenbeck
try watching Mike Bushes “Savvy Aviation “ series
What is a typical engine break in procedure for a overhauled or internally repaired engine?
That was a serious amount of brain power in that line up. Great information! Anyone know of any good A&P channels we can check out? Would love to hear more on the process of a major overhaul.
What’s the typical cost to replace a single cylinder on an a Continental E-225-8? Vs a top end overhaul for all six cylinders?
Great interview. Hope you'll do more as this demystifies what's going on mechanically and should help extend service life & improve safety. Gonna find an A&P I can take to lunch so he can teach me more.
Dan, something they brought up here was 'keystoning' of the cylinder, and this is something I don't understand. There's at least one remanufacturer who offers to remove the keystoning and put in oversized rings in the cylinder. This, according to him, if I understand correctly, is supposed to reduce cylinder and ring wear, and give you a longer time before you have to do a Top Overhaul, assumedly with equal conditions.
The next time your group gets together, could you ask them about that? I would be interested in hearing about that. Insofar as I know, they don't do it in automobile engines, so why in airplane engines?
I think what you are asking about is “honing” of the cylinder wall. With the exception of channel chrome cylinders, all cylinders are honed with a distinctive cross-hatch. The cross hatched micro scratches in the cylinder wall is there to retain oil to lubricate and cool the ring-cylinder interface. It is critical that the engine is broken-in correctly with high intercylinder pressures to establish the correct mating of ring-to-cylinder wall interface. If done correctly, the hatching will still be present (with lower peaks and shallower grooves) and will not be filled up with glazed oil.
Automotive engines are honed as well.
Removal of the honing will lead to overheated and eventually softened (annealed) rings that will fail to seal in the combustion gasses, leading to a loss of power and excessive blow by, if they don’t fail from fatigue first.
The cylinder manufacturer you mentioned might be offering channel chrome cylinders.
Channel chromed cylinders already have micro “cracks” in the chrome cylinder wall, so they don’t need to be honed.
In these cylinders, instead of chromium steel rings, the rings are chilled cast iron or a softer steel alloy. During break in of channel chrome cylinders, it is the rings that wear against the harder chrome cylinder wall.
Just a question: you mentioned "steel" cylinders. Did you mean cast iron, or actually steel? Also, the nickel cylinders. Are these similar to what are called "Nikasil" (plated aluminum cylinders) used on some aftermarket HD cylinders?
Good question Ric. Let me ask some A&P's. I'm pretty sure the nickle are plated.
@@TakingOff Thank you so much. That was a quick response! I have been an engine builder my whole life, started flying in 1979, but just never delved into aircraft engine building. It was a very good video. You guys do an oustanding job on presenting your material, and it is much appreciated. Thanks again, Ricci
run hard = "Italian tune-up" !
Looking into buying a salvaged motor now I know what there really worth
Good info on maintenance,
But there is no such thing as:
A top end overhaul, or major overhaul.
It was either overhauled or it was not.
§43.2 Records of overhaul and rebuilding.
(a) No person may describe in any required maintenance entry or form an aircraft, airframe, aircraft engine, propeller, appliance, or component part as being overhauled unless-
(1) Using methods, techniques, and practices acceptable to the Administrator, it has been disassembled, cleaned, inspected, repaired as necessary, and reassembled; and
(2) It has been tested in accordance with approved standards and technical data, or in accordance with current standards and technical data acceptable to the Administrator, which have been developed and documented by the holder of the type certificate, supplemental type certificate, or a material, part, process, or appliance approval under part 21 of this chapter.
That cylinder on the table will never pass a compression test.
Lol
Great overall show; fantastic real-world info from a few very smart folks. However...while Dan’s microphone was loud and clear, the clarity really dropped-off whenever the gentlemen on panel joined the conversation.
Yeah we had some issues that we fixed after.
@@TakingOff ; I don’t doubt that for a minute. When I spent some time with N70TB recently, we discussed the show. He had nothing but praise for all involved. One day, I’d be privileged to be a part of the audience. Keep up the great work! 🇺🇸✈️😎👍
Nice diversity
You did a great video. Nice lighting. Three cameras. But your audio sucks!!!
Yeah I did it wrong on that setup. We get better.