0TreeLemur

nerds.

IT SOUNDS JUST LIKE THAT!!! Especially when the wind noise picks up and accompanies the seal humming.

Last year we put in an EDM900 in our M20C and took out a bunch of redundant stuff. Items removed included: Garwin instrument cluster, MP/FP gage, tach, carb temp gage, EGT gauge and switch. We went through the wiring and removed a pound or so of disused wiring and connectors. The Hartzell prop gov was replaced with the compact and lighter PCU5000. I was certain that in the process of all this change/modernization we would gain useful load. My A&P Dave (RIP) was pretty certain not. No wager was placed, but I would have lost if a wager were made. The a/c w&b logs gave the accumulated/calculated useful load of 986 lb. We drained the tanks by removing the sump valves. Then we carefully leveled the a/c according to the Service & Maintenance Manual. The recently purchased digital scales were double checked. The result said that the UL was 945 lb after subtracting out the weight of the oil. Leaving in 8 qts of oil, the UL is 931 lb. As a card carrying engineer, I verified the level and performed the moment calcs following the procedure in the SMM. Why was the a/c 41lb heavier? A discussion ensued around the shop about the difference. Maybe we left a few lb of gas in the tanks when we pulled the sump drains. The sump drains are located so that when the plane is sitting at normal ground angle they are very near the bottom of the tanks, so we probably left no more than maybe 1/2 gal per side. So that's maybe 6 lb gained back. Looking at the logs, when the a/c was painted in 2004 they stripped the paint off the removable cowl parts and rough sanded the rest before repainting. The paint that they left on could easily weigh 20-30 lb, maybe a bit more depending on thickness. Also, I had put on Michelin tires that are about 1 lb each heavier than the originals. An a/c will gain 1/2 oz of weight per year by accumulated grease, dust, residue, mud dobber nests (e.g. Since weighing I've excised 0.5 to 1 lb of mud-dobber nests discovered since then. That gain can add up to a few pounds over 50+ years of "if a little grease is good, a lot is better". Paint. Tires. Mud dobbers. It all adds up.

Good job! The previous owner of my M20C went through the same process as you with the same result. The PC system w/ Accutrak II is amazing.

Yeah, yesterday my wife deduced that the dobbers where getting in there. Should be a seal there! Ours has decayed to nothingness. Don't see anything on LASAR.com

For those who like the smell of old airplane enough to want to sleep with it??

Huh- I didn't consider that. The frequency I'm hearing seems like it would be most likely a seal.

We installed the new door seal on our M20C yesterday afternoon. We used the Knots2U seal based on what I read in @Marauder's New Door Seal thread. We bought their adhesive and remover. This evening we took her for a test flight with a short hop for a $100 enchilada plate and some cheap avgas. The new door seal is working better. The old HD seal was so poor that the front seat passenger shirt tail would get sucked out under the door. That doesn't happen any more. However... On final approach to our destination we noticed a baritone hum coming from the door. The pitch and intensity changed slightly with airspeed, and the sound became intermittent when encountering turbulence. Definitely a new sound, which means it is the door seal- that is all we have changed. On the trip back the noise was a bit louder- happening over a wider range of airspeeds, seems like whatever is vibrating is getting better at it. Upon landing, we inspected the seal and it is still adhered to the door. No obvious changes there. We installed it according to the instructions, which was to install the "L shaped" seal with the thick part adjacent to the a/c skin. Abut the door frame except near the hinge, when the seal shall be installed as near to the hinge as possible. The sound seems to be coming either from the area of the door hinge or maybe from the seal at the bottom of the door. Anyone dealt with this? I don't think that the seal is quite thick enough for our a/c. My guess is that the part of the L we installed by the hinge, that is not next to the skin or the door frame, is what is vibrating. My gut tells me to either backstop it with some intermittent beads of silicone, or thin HD door seal material. Please, somebody has to have troubleshot a solution for this issue already???

After my flight instructor complained about getting cold sitting next to the door, we put a new door seal on yesterday. The old, leaky HD door seal was installed a few years ago by that same instructor, but that is another matter... In the process we took the door interior door liner off to avoid messing it up any more than it's 50+ year old self is already messed up. Look what we discovered inside the door! This huge mud-dobber nest (how did they get in there???) weighs about 1/3 of a pound. Judging from its roundness, has been rolling around inside the door frame for years. Taken together with the large one I found last annual behind the rat sock in the main wheel well, I've removed more than a pound of mud dobber nests. This one would not fit through that hole, requiring screwdriver-assisted disassembly and vacuum extraction.

"Free" is an optional interpretation. I donate, don't you? Anything to not see advertisements for @Marauder's ladies.

The pudding:

Not in the same thread. One in General Mooney Talk, and the other in Miscellaneous Aviation Talk. Search result:

I got really confused this morning because it seemed that the "Boeing Acquires Foreflight" thread had changed since I last read it on Wednesday, and my reply was gone. Digging in, I found two identically titled "Boeing Acquires ForeFlight" threads, one in "General Mooney Talk", and one in "Miscellaneous Aviation Talk", that were started within 6 minutes of each other. When two users read breaking news at the same time and decide to post it, it is not surprising that duplicate threads arise. The thread they decide to post that it depends on where they think it belongs. But, if we had "Breaking News" thread, then the second one to post a duplicate thread would be given a warning that such a thread already exists. This could trigger a fun game of "where's Waldo's news" and create an information race- making MS the most up-to-date aviation forum in existence! I suggest MS needs a "Breaking News" thread to put current events in one place, and minimize duplicate threads due to different interpretations of which forum breaking news topics belong. Thanks.

There is an identically titled thread to this one in the forum "Miscellaneous Aviation Talk". They started within six minutes of each other.

There is an identically titled thread to this one in the forum "General Mooney Talk". They started within six minutes of each other.

FYI There is an identically titled thread to this one in forum: General Mooney Talk. They started within 6 minutes of each other.

From the eBay advertisement text: "IF YOU DON’T SEE ANYTHING WRONG WITH THIS AIRPLANE AT FIRST GLANCE OF THE PICTURES, IT IS UNDERSTANDABLE. THE LONGTIME OWNER-PILOT OF THIS AIRPLANE HAD DIFFICULTY GETTING THE GEAR TO FULLY LOCK DOWN, SO HE DECIDED (RIGHTLY), THAT A PLANNED GEAR UP IS FAR SAFER THAN A POSSIBLE GEAR COLLAPSE ON ROLL-OUT." It has a Johnson Bar. Bar up = Gear down. I guess this means that either the gear were out of adjustment or something interfered with the Johnson Bar going into the full upright and locked position? Hmmmm. Once, while ferrying my C to get some avionics work done with another pilot, who happened to be a Vietnam -era USAF veteran with lots of time flying C141's, 757s, and 767s, I put the gear down and the little green light didn't come on. I said something stupid that rhymed with "So spit". He calmly lifted his left index finger to the upright and locked J-bar and said "I don't think you have anything to worry about." 'nuf said.

Lookit here! From the narrative presented in this ALL CAPS EXPLANATION, a story emerges about why only two of the prop tips are damaged, and why there is damage to the nose gear doors. https://picclick.com/1968-Mooney-M20C-5633-Ttaf-201-Windshield-Belly-382823270915.html A BARGAIN!!!

Ouch. Good thing to be done with.

Mine was more expensive too by about $600, but the following extra work was required: Stripping was made four days more difficult by the fact that someone had tried using spray paint to seal leaking tanks (I'm not kidding). There was paint in between two layers of polysulfide sealant. That plus, 1 ea. new left-hand fuel strainer and 2 ea. replacement fittings for sump drain installation. All in all for the extra work, the additional $600 seemed quite reasonable to me.

OK, until I watched your video, I never considered such a thing. Now I'm thinking that having a cheap 360-degree camera to abuse by slamming it through the atmosphere at high speed would be Really Cool. What did you get? How did you mount it?

Jeppesen Foreflight. I just hope they don't make us pay $499 a year to buy the Jeppesen Nav database... If so, I'll be moving to a different EFB.

Mechanical tachs tend to run slow as they age. It is unusual for one to read erroneously high. I like the suggestion by @Yetti that you verify using another means.

Great pic. Edison resealed my tanks in Nov. They don't leak. I think with a little photoshop action, I might be able to create a logo for the Gulf Coast Mooniacs using it as a prototype.

-a- cannot be a Dean, because in my experience they have no creativity, empathy, or style. Meanwhile -a- has all three. I suggest he and his 11 clones would more accurately be dubbed a "plenipotentiary" of MS.