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I'm a newbie looking to buy an M20F and found a 68 M20G that almost does the job. It was converted to an IO 360 from an early J and has a nice J model cowling to match the engine. My question, is it possible to get a field 337 or some other magic trick to Increase the gross weight / useful load of this bird to the F specification? The empty weight is 209# over the original specs with all the upgrades turning it into a 2 place plus baggage machine for my family of 4. I really like the Johnson bar landing gear and hydraulic flaps.

I've been enjoying my Rocket 305 for three years now. I've made a few upgrades along the way, always dutifully tracking the changes in the Weight and Balance log. I have also corrected a couple major mistakes in the math made long ago. Starting from the original factory Basic Empty Weight of 1923 lbs @ 43.4", 290 pounds of new equipment have been added to the aircraft (mainly the Rocket 305 conversion, built-in O2, and Charlie weights, plus a new COM radio and two G5s). 90 pounds of old equipment originally delivered with the aircraft have been removed (KFC 200, KCS 55A system, BX2000 system, and associated wiring). Q: How much *should* the aircraft weigh now? (Basic Empty Weight, including 10 gallons unusable fuel for the Rocket 305) A: 2123 lbs (@ 43.5") Q: How much does the aircraft actually weigh? A: 2273 lbs (!!!!!!!!) (@ 36.5") (!!!!!!!!!!!!!!!) Obviously, I'm freaking out. That's a 150 lb increase and a 7 inch forward CG shift that are unaccounted for. I've been all through the airplane with my A&P. There's nothing we can find that comes anywhere near explaining even a 15 pound difference, much less a 150 pound difference. The panel looks like a ghost town with all of the ancient avionics gone. I've got 20 lbs of wiring alone that was just removed. There are no errors remaining in the historical W&B entries. I read with great interest Rspencer612's topic Mooney Missile CG. I read about the possibly incorrect arm for the main and nose axles. Even if I can justify ignoring the actual measurements we made, adjusting to the referenced numbers still leaves the CG off by at least 3" from where I expect it to be, and where other Rocket 305s are. I also read that Rspencer612 appears to have resolved his problem by installing the Charlie weights that had never been installed when the Missile conversion was performed. In my case, though, the Charlie weights are definitely installed. I also have a heavy O2 bottle that should be biasing the CG well rearward. We tried this with two different scale sets, and they agreed to within 0.2%. Yes, we followed the correct leveling procedure, twice. We weighed with full tanks and subtracted the weight of 70 gallons usable fuel, per the POH weighing instructions. Has anyone seen a ~150 lb weight increase *and* been able to explain it? I read some comments on this forum and elsewhere about significant weight gains in aircraft as they age, but I haven't found anyone that was actually able to confirm the source of the gain (as opposed to just guessing that it might be dirt and oil, etc.).

I just noticed that I don't have the wt/bal station information. The only one listed on the Mooney website is for the F model. No information in the POH or service manual... I'm told there's a separate wt/bal manual for the older birds. Any one have a digital copy?

Hey guys. I just purchased a 66' Mooney M20E and took delivery of it today. I was trying to set up my aircraft in Garmin pilot based on the most recent weight and balance information I have. For some reason it keeps giving me an error and I was wondering if anyone has experienced this before or could help me out. I've attached some pictures to show how I have it set up now.

Do you guys update your weight and balance when there is a change of maybe two pounds? I'm pulling my power supplies after installing LED's.

I have just purchased a Concorde RG35AXC for my 1965E and will need to revise my W&B for the extra 2.5 lb. Can someone give me the official moment arm from datum for the rear mounted Battery Box in my, short body, aircraft? Any other items to consider in this change to an AGM like maybe adjusting the alternator regulator voltage. Concorde give a bunch of Voltages for a variety of temps. What are others using?

I am looking for the c.g. location of the various forward seat positions. I saw an on-line java applet that used 36 as the arm for the forward seats but I remember a chart that had different arms for a "forward" position and an "aft" position. I do not have my P.O.H. with me so I can't look it up. I am interested in this data for an M20J but it would be intersting to see if the numbers are different in the different models. Carl