carusoam

Way cool! 12 cam lobes for eight cylinders…? some cam lobes are doing double duty… similar to the IO360… eight cylinders… next stop, Turbine! MS has a few members that have gone PA46T over the years… Best regards, -a-

HEY! Clarence is in the HOUSE!!! @PA24Lvr nice to see the entire gang come out! including a few new (to me) names here. For the new to me guys… welcome aboard! PP thoughts only, not a social engineer… Best regards, -a-

Just a note… current rubber donut technology for the M20s are cylindrical shaped discs when they are molded. The steel washers begin life perfectly flat… they take on the slight donut shape when weight is put on them. They extrude outwards over time, temperature cycles, and weight strain… the rubber may continue to cross-link over decades getting harder with age… one thing that won’t change… the weight and volume of the rubber part, unless… it has absorbed some grease and oil. when rubber absorbs grease or oil… it has a tendency to swell. rubber parts that swell… only swell in one direction. Outwards, in both thickness and radius… important to know… the inner diameter doesn’t try to compress against the metal tube. sooo…. If you have an old donut. And, it is still tight against the rubber tube. It is not indicating signs of swelling. if you decide to make ‘owner supplied parts’ in accordance with the FAA guidelines… it will be important to try to duplicate what you have as far as rubber chemistry goes. rubber chemistry is interesting… it also includes fillers and carbon black. Molecular weight and percent X-linking also help to define what is there. for a how-to guideline of how to make an owner supplied part for a certified airplane… there is a thread around here for making an aluminum part for gear up lock block, and gear down lock block. selecting a better rubber, or changing the ingredients in the rubber compound won’t comply with the owner supplied parts rules… if you have a reason to improve the donuts… that would use the STC process. Have a look at that process as well…. We have a few STC writers around here that have built new Mooney cowlings, and swapped out the old air bag servos for electric motor servos on the step… the entire rubber molding world was centered around Akron Ohio during the 1900s. chemical analysis of the original parts can be done by a company familiar with rubber chemistry. Expect to hear words like DSC, and TGA… differential scanning calorimetry and thermo gravimetric analysis. physical analysis also can give hints to what the rubber was designed to do… hardness and compression followed by recovery after compression… then compare your analysis with one from a brand new M20C donut…. You may find out the rubber requirements for Mooneys hasn’t changed much in decades… the old donuts will have terrible hardness, and compression data… all stuff that changed since the day they were molded… do some research… snoop around the Lords website… see what specifications they can give you regarding the rubber donuts they make… they produce both engine mounts, and landing gear donuts… and metal washers that get used in both applications… The hard parts… duplicating the chemistry is all about finding the best rubber formulating lab… somebody that understands your requirements. Get the testing done. duplicating the hardness and compression details… that rubber formulating lab will have these tools as well… duplicating the original dimensions comes from the best estimates you can get from what you have in hand… and possibly contacting the Mooney Mechanic in Canada for his assistance. He has a set and knows how to measure. there are examples around here of how donuts compress over time… with pictures showing stack height change between old vs. new donuts… also around here is a rubber hose manufacturer… a guy that knows a lot about rubber. He makes mostly seals and rubber hoses for high end sports cars. But can help navigate getting donuts made. if I was in a bind… and needed to replace my donuts. And didn’t know where to start…. look for thick sheets of rubber… with the best match you can figure out… find somebody that has a die cutter, and makes the dies… (find that rubber hose / seal guy around here, he has this stuff) cut dozens of thick pieces of rubber, and stack them… testing your dimensions for ID, OD, and overall thickness… know that these will not be perfect replacements for molded donuts… but don’t be surprised how the compression function will be amazingly similar… of course, if you test the dimensions of a stack of sheets, and you have a stack height that works… next step would be to have a mold made to those dimensions… simulate donuts with premade rubber sheets, cut to the dimensions you determined earlier… Prove to yourself that you know the dimensions that you pre-determined earlier actually work… make donut molds that match the simulated donuts that you made… in the end… you can impress the FAA that you knew the original…. 1) dimensions of the existing donuts, when new… 2) chemistry of the existing donuts, when new… 3) relevant physical properties of the existing donuts, when new… 4) rubber manufacturing process of the existing donuts, back in the day… 5) make mold, make donuts, make paperwork… 6) review how to change the rubber donuts of your aircraft often… this may be easier on an M18. But, it may still need some specialized tools as well… compressing donuts, and setting gear rigging can be serious. PP thoughts only, not a rubber chemist or rubber formulator… or even a mechanic… best regards, -a-

Looks more like a low pass using modulated power, all the way down the runway… until the oddities of aviation physics takes over…. The nose decides to point left as the AOA goes higher… the plane was begging for some right rudder! best regards, -a-

hey all! Not sure of the age of this one… but, fits in with this thread’s topic… assume inside the cockpit… - there was a gear up warning, - followed by stall warning, - followed by the “you have arrived” aluminum scraping tones, the Mooney video starts about the 1:45 minute mark… Do you firewall the throttle after that? Two pics… just before the scraping, and one during the scraping… this pilot went with the power up and keep going option… (not recommended) under such great speed control… this pilot went lower and lower, increasing the AOA as speed bled off… the power keeps being adjusted the whole way… He probably never had the AOA that high before, with all of the alarms ringing… the sight picture added another level of “something ain’t right here”. it’s possible he started the go around, seconds before the momentary landing occurred… just not soon enough… Credit goes to the videographer on this one… he must know what’s happening. best regards, -a-

Hey! thanks for inviting me down memory lane with you fine people… it was y2k when I acquired a very worn in M20C… it fit like a glove, especially with baby seats in the back… stumbled upon MS while looking for a replacement… M20Js were an easy choice, Missiles were next on the list, Ovation was a stretch goal… ending up with a Standing Ovation… took the help of MSers to get there…. one day I was helping a new guy define differences between an Eagle and Ovation, a few months later he was giving me a ride in the coolest Screamin’ eagle ever..! Shortly after that, my plane suddenly needed a prop replacement… our friend @Cris (rip) helped me with a few contacts… and get some flying time… Getting to meet as many MSers as possible makes my day. And confuses my family…. one of those times.. meeting up with @Mitch at the mapa tent in kosh…. Where Lemonade is a tradition! ’dad, how do you know that guy?’…. MS! I started here with a member number just over 100… and read every post generated. not hard, there weren’t very many posts to read even day… as we near 20 years of MS… I hope to get that 50,000th post before then… Happy Saturday! Best regards, -a-

Inviting @mike_elliott to this thread… -a-

A YouTube channel I frequent, hoping to NOT see my Mooney friends making the news… The YTer is Keoni, an AARF fire fighter at an airport in Hawaii… prayers for the lost and especially, the injured airman… Best regards, -a-

Hey all! Quick refresh on the topic… The O is in annual, needs ELT modernization. options are… 1) Artex 345 2) ACK E-04 3) Kannad Integra 4) want to have 406mhz, 121.5, and GPS data connected to it… - I believe the old one is an Artex. - there is a GDL52(?) mounted on the shelf in the tailcone. (GPS data for the older BK X-ponder) reusing old footprints would be nice if able. expecting to replace all of the 30yr old equipment. as usual… plane is 1kmi away from me, unable to look what’s there… expect Mooney standards for 1994… Thank you for the words of advice! Best regards, -a-

One thing for sure… if you have learned to use a certain amount of prime in warm weather… and the temps have cooled a bit… less prime won’t make any sense (to a chemical engineer). 100LL is known for its inability to evaporate as temps cool… the IO550 uses 40°F as the cut-off from normal start to cold start… where additional seconds of prime are used… and running the fuel pump on Lo to keep it running for a few more seconds… read up on various starts to understand them better… as a flooded start may be in your future… Best regards, -a-

Fresh out of annual? Fresh grease gets pushed into the hub causing some to escape out the seals… deep cycling the prop? another reason some grease may get past a seal that has been sitting awhile… when grease comes out three inches of prop blade… it will leave small bits of grease on the windscreen… a clean windscreen is required to see it… let’s invite… @Cody Stallings for some insight on prop grease leaking… Best regards, -a-

Nice work AV! thanks for sharing. the mechanics of buying a plane have never been easier… With MS, we collectively either know the owner, or the plane, or can have somebody Knowledgeable put eyes on it for us… getting a decent PPI is a known part of the game… MS even has an insurance guy around here somewhere… Transition training is the next fun step! PP thoughts only, not a CFI… Best regards, -a-

I followed your logic up to the last sentence… An updated M20E makes a great retirement plane… Speed, efficiency, and a great instrument platform… for two. ”don’t need a long body… would rather have the speed…” last I checked… all long bodies are much faster than all short bodies… add a pair of TNs… then you have reached ludicrous speed in the FLs for two… with 1knms range… this is often the last step prior to going turbine… this could be explained if comparing an M20E to an M20F… the F, is a mid body… sharing the same IO360… Best regards, -a-

One change for M20Js showed up with the shaped wing tips… and… rounded corners on the side windows… And… matching interiors to windows… the latest interiors were fabric covered molded fiberglass… the 70s M20Js… were very 1960 Mooney… the 90s M20Js… were very 90s Mooney… extra care should be taken to know what the MGTOW is… it directly affects the UL… a few of the structural Tubes were changed to support this.. The separate mags are nice… roller cam followers are cool too… the best part… they all fly the same, unless you got the Rocket Engineering STC… 300hp makes a real difference… go Missile! PP thoughts only, not a plane sales guy… Best regards, -a-

Has anyone had an io550 rust problem? I haven’t seen any yet. plane lives in nj, indoors, not climate controlled… best regards, -a-