atpdave

I'm pretty sure it's impossible for Lm/n to be 5 inches greater than Lm/r. I have a page for the nose gear steering adjustment from the a M20K SMM, not an M20J, but I think it's the same. It says that the nose wheel axle centerline should be no more than 0.06 inches forward of the trunnion leading edge, measured with a plumb line. It's interesting that the difference in your diagram is exactly 5 inches, the same number as the trunnion distance from the reference datum. Measuring Lm/n is easy. Measuring Lm/r requires that a plumb line be dropped from the trunnion centerline. If we assume that Lm/n was accurately measured and Lm/r was not measured and is off by approximately five inches, your actual CG would be somewhere around 44 inches aft of the reference datum. I suggest that Lm/r and Lm/n be re-checked. Pages from MAN134 SMM M20K.pdf

I didn’t make that very clear. I was referring to McFarlane, who I think bought Flight Resource. Here’s a link to the STC.

Here's what McFarlane/Flight-Resource (STC holder for MT prop for Mooney) says (I have highlighted):

Yes. The slight difference is mostly due to the trunnion radius. Compare how the plumb lines are set in the SMM (weighing vs. rigging). I wonder why the distance between nose and main axles in @Marc_B's W&B is 2.3 inches less than that shown in the M20K dimensions figure I attached.

@druidjaidan, in the W&B sheet you show in the third post, I think all the arms are about 10 inches too far forward. Just looking at dimensions, weighing and gear rigging info in the SMM, they should be around -5.3 from the zero datum for the nose and +66.3 for the mains. Assuming the weights (and my calculations and assumptions) are accurate, the CG for your plane should be around 41.5 (no fuel) and 42.8 (full fuel).

Here's one that I know of personally, December 1981. Steve Smart was an acquaintance of mine. He became a preacher after that. No flight plan was filed and no one knew they were missing.

I had this done recently. Attached (hopefully) are the takeoff and climb charts from the POH supplement. I still cruise at 2400 rpm as before although could do 2550 post-mod. Pages from POH Supplement-2.pdf

I think having airworthiness inspections valid for 24 months might be a good solution.

Falcon Crest shows 1 in stock in San Antonio TX. http://www.falconcrestaviation.com

I want to thank James @OSUAV8TER for seeing this project through. The original halogen design was defective at best and it’s great that WAT, with James’ effort, developed this huge improvement for our benefit. Now to replace the wingtip lenses, melted by a previous owner, at $362 apiece (sigh…).

I was wondering how the ignore function works on this site. Looks like the perfect time to give it a try.

Because I had nothing better to do today I looked at the electrical schematic diagram for your plane. It looks like you have a four conductor shielded cable running from the nav/strobe switches through some connectors to the strobe power supplies and nav lights in the tips and tail. This is sufficient to wire the new lighting. The red wire is for nav, black is ground, yellow is strobe, and green is spare (please confirm this in your plane). If you are only replacing the wingtip lights and keeping the tail incandescent/strobe, the GEAR DOWN annunciator will dim properly with the nav light switch. If you are replacing the tail nav/strobe with LED you will need to wire a relay or other device to the GEAR DOWN return line in the annunciator or else live with a permanently dimmed and unreadable in daylight GEAR DOWN light, not a good thing IMO. You can wire the new lights using the red, black and yellow wires but the strobes will not be sync’d. You can use the green wire to sync the strobes but that would require jumpering them together in a connector behind the panel. I have no idea of the difficulty of doing that.

I have 0401.37 and I am using 8GB Sandisk SD cards in the bottom slots. I’m also using a 32GB Sandisk SD card in the MFD top slot for flight logging (overkill for sure) and it works fine. All are standard FAT32 format. Earlier software was much more picky about SD card formatting but 0401.37 seems much improved in that respect.

I answered your question already, earlier in this topic. I included some other relevant info so maybe you didn’t see it. The answer to your question above is yes. Someone knows. I know that it does not, as I stated earlier.

There is no nav light circuit in the tailcone, just strobe power. I replaced my wing nav/strobes with the 650Es together with the 500, which freed up wiring to/from the old failed (removed from bulkhead) wing strobe power supply, which were then used for nav light power and strobe sync. (I kept the wing aft position lights as incandescent, allowing proper dimming of the GEAR DOWN annunciator light. Lots of aft position lighting now.) It sounds like you still have the old wing lights. I don’t think it would be worth the effort to splice into the wing light wiring under the cabin and run tailcone wiring just for a redundant position light.

I replaced mine when the strobe power supply quit. Whelen used to repair them relatively inexpensively but they don’t anymore. LEDs weren’t much more expensive than a new power supply, and I wasn’t going to go back with old technology. I ran new tail wiring essentially as you had described and had it inspected and signed off, probably saved a few hours labor charge for that.

I think M20R SNs before 29-0475 had inline fuse holders, not CBs for this. Look for a black inline fuse holder wired to the corresponding battery relay.

I experienced the GPSS fail when I bought my 2005 Ovation2. I think the baud rate on an RS232 output from the GIA63 to the S-TEC 55x was set wrong, probably happened when the GTX345R was installed for ADS-B. I think it defaults to an incorrect setting. When I did the WAAS upgrade it had to be reset again with the GIA63W. Paul Maxwell knows all about the GPSS fail. The first time he told the seller's agent how to fix it over the phone and the second time he reset it as part of the WAAS install. I don't know if the ILS deviation is a different problem or not. I don't recall that happening.

When I converted my Ovation2 to LED nav lights I left the A508-28 incandescent bulbs in the aft tip positions so the dimming function would still work. I think the cold resistance of those 2 bulbs in parallel is less than 2 ohms. The GEAR DOWN annunciator brightens/dims properly. If I need a replacement bulb and can't get one I would probably install a relay, and I would also like to know what kind WAT/Mooney would specify.

Atlas’ fuel price at TPF is currently $8.69/gal. The discount brings it to $7.94/gal. Whoopee! Sheltair at LAL, 23 nm away, charges $4.84/gal at the self serve. $3.10/gal less.

If a tire is pressurized to any given pressure with any gas composition at a certain temperature and the temperature is increased by a certain amount, the pressure will increase by the same amount. For example, if a tire at -40F is pressurized to 30 PSI with either pure nitrogen or atmospheric gas (or any other gas), the pressure at 200F will be approx. 47 PSI in any case, assuming the tire volume remains constant . The mass of the gas is the only difference, molar mass oxygen 15.9994 g/mol nitrogen 14.0067 g/mol atmosphere (approx.) 14.445094 g/mol

The IA who inspected my LED upgrade thought the minor weight change was enough to do a W&B update. Easy to do; why not do it?

I’m not a maintenance expert, but I think STC SA800EA allows strobe installations on aircraft not originally equipped with strobes and would not apply to M20Js and later models. Martin’s wingtip STC assures that with the newer wingtips the lighting coverage still complies with regulatory requirements, among other things like aerodynamic and structural issues. Replacing the nav/strobe assembly with 650E LEDs in the newer wingtips should be a minor mod with no other STC required.

My 2005 O2 has the early gen G1000 and S-TEC 55X. When I got the WAAS upgrade the software was updated to 0401.37. I was told the non-WAAS G1000 is stuck with 0401.34.

Here is how the Ovation 2 G1000 handles tach alarms: Pages from 09 Supplemental Data.pdf