Airways Posted September 23, 2020 Report Share Posted September 23, 2020 According the maintenance manual, you can level a Mooney just by varying the nosewheel tyre pressure. Is this true ? I’ll need to level my plane in order to calibrate the fuel level readings on my EDM. I was expecting a need for jacking up the plane or something else... Quote Link to comment Share on other sites More sharing options...
EricJ Posted September 23, 2020 Report Share Posted September 23, 2020 2 hours ago, Airways said: According the maintenance manual, you can level a Mooney just by varying the nosewheel tyre pressure. Is this true ? I’ll need to level my plane in order to calibrate the fuel level readings on my EDM. I was expecting a need for jacking up the plane or something else... I've weighed one Mooney, and we had to let all of the air out of the nosewheel and put 3/4" spacers under the main gear to get it level. It was a C model. 1 Quote Link to comment Share on other sites More sharing options...
Airways Posted September 23, 2020 Author Report Share Posted September 23, 2020 That might work without too much hassle. Anybody did this with a K ? Quote Link to comment Share on other sites More sharing options...
PT20J Posted September 23, 2020 Report Share Posted September 23, 2020 I've never tried it although the manual for the J says it works. But... The wheelbase is about 72". The airplane sits about 5 deg. nose high. 72 * tan(5 deg) = 6.3". It's hard to see how you could lower the nose 6" by deflating the tire. You could always run the mains up on a couple of short 2x6 boards and then let air out of the nose wheel tire. Skip Quote Link to comment Share on other sites More sharing options...
carusoam Posted September 24, 2020 Report Share Posted September 24, 2020 Expect lowering the air pressure to be a fine adjustment... As in, get it close by using a couple of boards, and adjust the final amount by letting air out... I think I read that around here somewhere... + It Makes sense... I don’t think the words solely by adjusting air pressure will work... that could be mis-interpreted around the world by so many different people... Best regards, -a- Quote Link to comment Share on other sites More sharing options...
tmo Posted September 24, 2020 Report Share Posted September 24, 2020 My K will NOT be level by just letting the air out of the front tire. When lifted by the jack points, the main landing gear wheels are an inch or so above the floor, so it isn't just old pucks. Quote Link to comment Share on other sites More sharing options...
Airways Posted September 24, 2020 Author Report Share Posted September 24, 2020 10 minutes ago, tmo said: My K will NOT be level by just letting the air out of the front tire. When lifted by the jack points, the main landing gear wheels are an inch or so above the floor, so it isn't just old pucks. So jacking up is no solution either ? I don’t mind using boards, but I find it odd that a maintenance manual can be off by so much. My trust in manuals is pretty unconditional, you know Quote Link to comment Share on other sites More sharing options...
tmo Posted September 24, 2020 Report Share Posted September 24, 2020 (edited) Jacking the plane worked; it lifted the main wheels up about an inch till the plane was level (the two odd screws above avionics bay panel). We chose to jack the mains up because we had the jacks, but putting the mains on some wood /plastic / maybe even cardboard would have worked as well. Edited September 24, 2020 by tmo Quote Link to comment Share on other sites More sharing options...
Airways Posted September 24, 2020 Author Report Share Posted September 24, 2020 So let me get this right; deflating the nose tire + jacking the mains 1 inch agl leveled the plane ? Quote Link to comment Share on other sites More sharing options...
ragedracer1977 Posted September 24, 2020 Report Share Posted September 24, 2020 1 hour ago, Airways said: So let me get this right; deflating the nose tire + jacking the mains 1 inch agl leveled the plane ? That worked on my C model. @Eric J weighed mine. Nose tire flat, a couple ~3/4" boards under the mains, and it was level. 1 Quote Link to comment Share on other sites More sharing options...
tmo Posted September 24, 2020 Report Share Posted September 24, 2020 3 hours ago, Airways said: So let me get this right; deflating the nose tire + jacking the mains 1 inch agl leveled the plane ? Partly deflating the nose tire and jacking the mains about 1" leveled the plane, yes. Some plywood under the mains would have worked as well. 1 Quote Link to comment Share on other sites More sharing options...
RLCarter Posted September 24, 2020 Report Share Posted September 24, 2020 I use a couple of 2x12’s under the mains, then fine tune it with nose wheel psi. My hangar floor is fairly level but you can adjust left/right with tire psi on the mains. 2 Quote Link to comment Share on other sites More sharing options...
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