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Tommy

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Everything posted by Tommy

  1. It's about mixing the oil. You are more than welcome to join the discussion
  2. Yes, they are controversial so I am prepared to be challenged. In fact, really happy to be challenged. It forces to do some research or better still I can just read about the researches that the other guy managed to find (saves me tonnes of time) Sadly, that didn't happen in our discussion on mixing oil, bottom loading, and CICs... I gave you references to all three (probably not on the 2nd one because I can't find any). What did you give me in return?
  3. Somebody cry me a river.... 1) So I see you can't find a case of mixed engine oils causing harm whatsoever. - I can't but it was cautioned by Phillips Technical Manager. 2) you clearly can't distinguish between rated loads and bottoming loads on aircraft tires, and ignore the latter as a factor or a possibility in aircraft damage from hard landings - Neither can Mooney engineers... 3). you think that corrosion X causes intergranular corrosion. - Not me, the researchers did. I gave you the reference. Have you read the entire paper? Got it. Great! its easy to see what kind of person you are. Yes the inquisitive and humble kind. One final couple of questions, then I'm hitting the ignore button. Do you even have a pilots license? Do you own an airplane? No I am just a small town medical doctor and I never flown nor owned a plane. But what do they have anything to do with the discussions? Let's see, I have a technical manager from Phillips to tell me about the oil. I have Mooney / Speciality Air to tell me about the "bottom loading." I have CASA researchers tell me about CICs... Even if I am the chief pilot of Emirates or the sultan of Brunei who owns hundreds of planes, would I know more about the oils, tires, and CICs? Unlikely...
  4. You see, @jetdriven we all made statements based on our experience and what we read. Sometimes we are right. Sometimes we are wrong. But one thing for sure is that we will get challenged every now and then. But our similarities stop there. Realizing that I might be wrong and I ain't really much of an expert, I go away and do some researches then come back and share with others (with proper references). You, on the other hand, try to beat up the person who disagrees with nothing but "I know so much more than you and the experts" attitude then resorting to tactics like calling names "little troll kids" "hopless" or asking people to "leave the forums" Does it really give you that much butt-hurt when you get challenged?
  5. It says it's safe. It does not say it's "fine" which is what you asserted. Bring me one evidence of a research to say that's it is completely fine otherwise your hypothesis is also "total crap". You have thousands operating, hundreds of hours working plus ONE A&P to back you up? WOW. Sorry to rain on your parade but this Phillips guy has access to data collected from million+ hours of operation, from thousands of hours working in labs and shops, and from hundreds of A&P all around the world. What makes you think that you know more than his guy when it comes to engine oil? You just sounded like some hot shot intern in the major teaching hospital that I work and teach who likes to tell the head of plastic surgery how to suture. I trust this guy because I realize how little I know when it comes to oil and I believe that he probably has some evidences to show that mixing oil may cause minute damage to the engine? If not, why didn't he just come out and say it's all fine. Why did he say only for emergency top up only? I am in complete agreement with his statement (which is also what my old A&P said and he had 45 years of experience running an engine work shop with 15 junior A&Ps). If you think his approach is "OWT." Shouldn't you be the one writing to him and seek clarification or data? "The FC3 is a stronger tire and wont cause damage to your airplane with a hard landing" How can you say FC3 is a stronger tire when their loading limits are the same? Where is your evidence beyond your own observation and experience? I actually wrote an email to Specialty asking about the bottom loading on Aerotrainer. I don't know why I need to since Mooney didn't specify the bottom loading. And would you mind sharing - with proper reference - what you had found after 30 minutes of sophisticated internet searching? Is it really that difficult to get into your head that one or two mishaps with your own tires MEANS VERY LITTLE when equal number of pilots have good experiences with Air Trac or Trainer? Is it really that difficult to get into your head that just because you (or your uncle and cat) mixed oil a few times in your life and your engine made it to TBO also MEANS VERY LITTLE when someone else might have done the same but didn't fare so well? The world doesn't revolve around you, mate. I know how smart and experienced you are but there will always be people much more clever and knowledgeable than you and me. With Corrosion X: again, I gave you the reference so if you disagree, you are more than welcome to write to the researchers - ie. qualified metallurgists / scientists who spent years if not decades studying this phenomenon - and tell them you know better because you have 1000+ hour flying and 100+ hours of shop time. Don't you dare to think that you can just go around and belittle people's work and not get some sort of retribution, my friend...
  6. I don't mind when someone makes an extraordinary claim like "more expensive tire = better tire" based on their own individual experiences. After all that's what MS is all about BUT TRY NOT GETTING ALL DEFENSIVE AND RUDE (asking people to leave the forum etc) WHEN ALL I DID WAS ASKING FOR SOME HARD SOLID EVIDENCES OTHER THAN YOUR OWN OBSERVATION. If you don't have it, you can just say "no I don't have it" then move on or, better still, do a bit of research and come back with interesting facts and articles that we love to know and read. "Extraordinary claims require extraordinary evidence" Carl Sagan couldn't be more right.
  7. Okay. Show me the evidence. Oh dear, here we go... My requirements are so specific and strict?? A beg of your pardon? The question was framed PRECISELY to what you have claimed. In fact I was lenient not to say "in a Mooney" or even went as far as asking "in a Mooney with the same air frame time and same landing gear condition, landing with identical force differential on a runway that has the same characteristics as the one you landed on." Because when it comes to tires what applies to a Cessna may not apply to a Mooney and what applies to your Mooney with the conditions on that day may not apply to the OP or any one else. That, my friend, is the humble pie you need to have some time...
  8. I will double down. Find me a GOOD research paper that says the bottoming load rating matters - specifically, when and under what circumstances, for eg. the surface of the runway, the force of the landing, the force differential, the side-load etc and with what difference in rating before it can be considered significant in GA aircrafts with MTOW < 5700kg? 200$ to you via paypal if you can find it. If you can't, you are still more than welcome to come back so I get to enjoy watching you eating the humble pie. Because if it doesn't matter (again, Mooney DID NOT SPECIFY IT IN ITS MANUAL), then what's the point of me looking up Aero Trainer's bottom load rating? ps. google "How to read a paper" to see what constitute as a good paper. pps. I could've gone even harsher with my criteria to say " in a Mooney" but I honestly want to give that $200 away because if it exists, it sure will change how I buy tires from now. Small price to pay.
  9. "It was a wings level hard landing where the side that incurred damage was the same side as the cheap tire." There is no such thing as perfect wings level landing. One tire will always touch down first even if it's a nano second difference. That's just science. Would that nano second make a difference? I don't know but I am willing to bet that you don't know either. That itself is enough to counter your theory. What I am trying to say is this, mate. There are so many possibilities and variables. One hard landing does NOT have the power to give you any statistically significant amount of data to draw outrageous claim such as expensive FCIII is definitely better than Aero Trainer. That's why GOOD DILIGENT scientists carry out thousands of experiments before drawing conclusions.
  10. ps. the thickness of the tire!? The thicker the better. WHERE THE HELL IS YOUR EVIDENCE? ps. would you be surprised if Aero Trainer has EXACTLY the same bottom load rating as FC3? If that's the case, does it mean your theory is wrong? And even if it's lower, HOW MUCH LOWER IT NEEDS TO BE BEFORE YOU CONSIDER IT AS IMPORTANT AND MAKES A DIFFERENCE? Do you know? Well I don't. Correct me if I am wrong but I don't see Mooney specify bottom loading requirement in their maintenance manual. So is there something you know that Mooney doesn't?
  11. You really need to go and take a course in philosophy 101. Burden of Proof is on you when you say expensive tires like FCIII is better than cheap tires like Air Trac or Aero Trainers AND that thicker and stiffer tires are better. Yes you did provide evidences and opinions - YOUR OWN and nothing else. Maybe, what, 3 or 4 sets of tires you changed on your Mooney? This is precisely why I said to the OP, take it with a grain of salt because for every person who vouched for FCIII there will be another dissing it. So, unlike you, Alex @Raptor05121 and I went on and did some researches. I couldn't find anything I considered to be objective but Alex might had something. Where is yours? NONE... except your own...
  12. You have data? For couple of years? On one or two engines? Maybe what, 10 or 20 oil changes? You called that data? Meanwhile Philips sold probably half a million liter of this thing + deals with hundreds of customers + conduction product R&D EVERY SINGLE DAY. You have the delusional propensity of believing yourself being the expert of everything in aviation and offer nothing but your own opinion and experience when others including myself took the effort to do researches and ALWAYS give proper references to articles so that even I was going to quote the articles "sporadically" like you had accused me of doing, people can still read the article in its entirety. But, hours and days later, I am still waiting for the references to your claims 1) that mixing oil is good / fine, 2) that FCIII is 3 or 4 times better than cheap Air Trac, and 3) that structural damage caused by CIC is nothing compared to corrosion.
  13. Would love to read about it because it will certainly disapprove expensive = better theory.
  14. I don't know but he is the top guru at Philips so if I am going choose side between this guy and you on issues relating to engine oil.... hmmm.. I stated that AFAIK it's not a good idea to mix oil. You said it's an OWT so I did a bit of search and found this article. Unfortunately it was vague and ambigous. But sure still beats you for not actually presenting any evidence to back up your claim.
  15. Yes I said it in no uncertain terms that it's safe but it doesn't mean it's good (well at least that's how I interpreted)! Tell me, if it's good or do absolutely no harm to mix the oil then why he recommends only in emergency top-off?
  16. Yes, but safe doesn't mean good. That's how I interpreted this Aviationpro article. @jetdriven is right in saying that it's "ok" to mix oil but then this article said only do it when you don't the same type + brand of oil.
  17. Google it. There are plenty. Now I will be the first one to admit that I may well be biased so I look for reviews that confirm my bias. But the fact that they exist along with many other contradictory reviews is pretty revealing. But there don't seem to have any such reviews on GA tires. None can satisfy because these are all anecdotal evidences presented by pilots (not experienced A&P or tire specialist) who probably had gone through 3 or 4 sets of tires with their Mooney. That's why I say, in the absence of hard evidence, perhaps the cheaper the better!? The coolest part of MS is also challenging the knowledge and the understanding of actual Mooney pilots ( myself included of course.) I also bought some even fancier driving shoes now because my cheap tires last as long as the expensive ones (anecdotal)... Best regards, -t-
  18. And the reason of my skepticism of the more expensive the better stems from car tires. Time and time again, reviews seem to find cheaper tires mass produced in SE Asia outperforms their more expensive European / N. America competitors.
  19. I see. But did you land heavier on one side than the other? The Aerotrainer might be the tire that took most of the brunt? Other possibilities include and certainly do not limit to: 1) FCIII might also blew and resulted in the same amount of damage if it was placed on the same side when subjected to the same force because the donuts weren't as fresh on that side? 2) Maybe that aerotrainer was one of those rare ones that escaped a good QC? 3) Was the aerotrainer a much older tire than FCIII on the other side? 4) The runway surface, maybe it was not paved evenly or had rough patch-up areas? So many possibilities / uncertainties. With regards to the sidewall thickness and stiffness. How do you know thin and soft automatically translate to poor durability / safety? I can equally argue that thinner and softer tires are better because they cushion the impact more than a strong and stiff tire? I know your gear door was damaged but it sure beats bending the wing (causing fuel leak) or dinging the prop with a very stiff tire (big bounces)? Of course I am just speculating but come to think of it you were too, weren't you? Because neither of us are specialist in rubber / tire technology.
  20. Don't get me wrong, before we have an objective test done, the best we often got are the individual testimonies. I am simply cautioning the OP to be careful when bases his decision on this kind of recommendations. I did this by simply asking for objective evidences which does not include flashy marketing material.
  21. Ad hominem. If you look back the whole conversation, I wasn't directing at you initially. Instead, I was just making a sweeping statement about individual recommendations. You then said "no benefit of economizing" but I saw "no benefit of splashing out" so I asked for some solid evidences. All I got was anecdotal hearsay and hyperbole - "Best combinations that will last 15 years(!). Now you are angry and getting personal...
  22. Again, you are insinuating buying cheap tires = taking chances. And again I ask "how do you draw that conclusion?" I found when people's personal experience / belief is challenged, many become defensive, not knowing that their individual experience / opinion is the lowest form of evidence... https://en.wikipedia.org/wiki/Levels_of_evidence And I am merely asking, for my and OP's benefit, a slightly higher level of evidence... Because it's our plane, it's our nickel, and it's our life. going around dishing against a particular tire based on one's limited experience and expertise... Have you ever considered the possibility that perhaps someone in the near future will do an objective test and discover that FCIII is worse than Air Trac in terms of durability / safety etc etc?
  23. How do you know that? Bingo. You said it. What I am saying to the OP is that, in the absence of objective evidences, he is best to take marketing and individual opinions with a grain of salt. He will probably be better off to run a survey to increase the size of his sample or simply buys the cheapest tire that he is comfortable with.
  24. Again, anecdotal evidence. Is there anyway you can be 100% certain that the same damage won't happen if the FCIII was fitted instead of AeroTrainer?
  25. Suffice to say, that's not normal and you need to get to the bottom of this before your holiday! I had a similar issue recently and the oil amount and drip pattern (this is like blood spray analysis in a crime scene) that was similar to yours. Follow Clarence @M20Docadvice, me and my A&P washed the engine and ran it for few minutes with cowls removed then look for the leak. Turns out the lower cooling baffle is slowly cutting the rocker box drain line (there is a Mooney SI on this but I am not sure if it applies to your engine)! Send a chill up my spine realizing that I had been flying with this problem. Even more troubling was that initially I was going to ignore it because I had a governor oil leak after O/H and a filter, I thought it could be the combination of the two. It's only a 1.5 hour fix So don't ignore it!
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