wpbarnar

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About wpbarnar

  • Rank
    Advanced Member

Profile Information

  • Gender
    Male
  • Location
    Southeast Louisiana
  • Reg #
    N413ZM
  • Model
    M20K Encore

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  1. Is there a 200 kts Mooney?

    The Aspen has a VSI tape that pops up in the HSI window when you are in a decent. 200k TAS is plausible in a 252 @ 25k ft. I think he is level flight. @gsxrpilot, Have you ever looked into why the JPI and Aspen OAT indications don't correlate closer. If the Aspen is reading low you are going a knot faster. Bill
  2. I like the Bogi-bar from Bogert Aviation. It locks solidly onto the axle of the tail wheel. I have used and owned others, but believe the Bogi-bar clamps on the best if properly sized for your particular tail wheel. Generally I only pull with a tow bar and push with my hands. I typically push most tail wheels at the attachment point on the rudder for the flying wires. Place the base of your thumbs on the attachment point and you can push without pushing on the wires or fabric surfaces. Bill
  3. Prepping for Harvey

    Don't need to jack it up. Pull the airplane forward, lay out garbage bags behind the wheels and push it back on to the bags. Then pull them up. This is from experience as I used to reside in a crappy row of T hangars that were susceptible to minor flooding. Bill
  4. Oil in Standby Vacuum Pump???

    If I did it again, 3 to 4 hrs. Doing it for the first time 4+ hrs. Probably the most difficult part was removing the old hose from the manifold under the glare shield. It is difficult to reach and see. Practice on the spring clamp with your tool of choice on the standby vacuum pump end before tackling the hard to get to one. Remove the left rear seat back and screws holding the side panel so it can pulled away at its top and back edge. Remove the carpeted side panel in the baggage compartment. It comes out easy with the side panel loose. From that point I could kneel in the baggage area and reach and see the two difficult spots when pulling the new hose in place. There is a vertical piece of the fuselage tube frame located at the end of the passenger compartment and beginning of the baggage area. The hose is routed between that piece of tubing and fuselage skin which is a tight fit. The other tricky spot is just forward of that area. The hose transitions down and forward through a hole in a flange of the fuselage. As I feed the new hose through that hole, my helper pulled on the old hose over the top of the panel. That is a long pull, but we did not encounter any resistance from that point forward. Bill
  5. Oil in Standby Vacuum Pump???

    After determining the degrading Tygon tubing in my standby vacuum system was the problem, I replaced it with Aeroquip 306 (MIL-H-5593) due to concerns of damaging another vacuum pump. Now I am really glad that I did. The old tubing showed evidence of its oil or plasticiser attacking other plastic pieces that it was in contact with. Surely the long term effects of being in contact with wiring insulation would not be healthy. See the attached photo with the imprint of a tyrap on the Tygon hose. I have learned a lot since my first post. IMHO, Tygon tubing in this service should be inspected on a regular basis and replaced at the first sign of degradation. The replacement wasn't as difficult as I originally thought. I removed the pilot's seat , glare shield, baggage compartment side panel, and all the lower side panels. I joined the hoses together with a short piece of 1/2" wood dowel and a couple of screws. Pulled the old hose from the front and feed the new hose in from the rear. Snaking the new hose in place was the easiest part of the job. I spent more time removing and installing panels. If I had to do it again, the pilot's seat and lower side panels would stay in place. The two tricky spots for snaking the hose in place can be accessed from the baggage area. Bill
  6. Oil in Standby Vacuum Pump???

    Have you removed the glare shield on top of your panel? Access to where it connected to the manifold was from the top on my K model. It is behind the attitude indicator on the fire wall. I was tempted to remove the AI for better visibility but managed without doing so. Bill
  7. Lycoming factory lead times for overhaul?

    I purchased a factory reman from Lycoming in Nov '14. The actual delivery time was 11 weeks vs the 6 weeks quoted. Based on the date on the test run sheet, the engine was assembled in 4 weeks. Apparently it took another 6 weeks for them to paint and prepare it for shipping. Bill
  8. Optimizing 201 engine performance

    What position are you flaps in? The flap toggle switch in your photo looks like it is in the take off position. Bill
  9. Oil in Standby Vacuum Pump???

    Mark89114 Based on the N# your O is a 2000 model. Is the tubing to the vacuum pump similar in appearance? Bill
  10. Oil in Standby Vacuum Pump???

    Could that be a slurry like mixture of graphite from the vanes and the oil? The clear oil I saw was just prior to the pump inlet. Internally in the pump it was dark and dirty. I also had some of that paste like material in the ports. Your hose is identical in appearance. I wonder if they are that same color when new? Bill
  11. Oil in Standby Vacuum Pump???

    I believe the source of the oil is the hose itself. The hose from the manifold under the glare shield to the standby vacuum pump is made of some type of vinyl. I think it is slowly breaking down due to its age. Over time, a small quantity of oil accumulates in the hose and migrates toward the standby pump. Key findings that lead to my belief: The vinyl hose feels oily or greasy to the touch. The oil in the pump suction was clear, not engine oil. I have thoroughly inspected all the other vacuum system components. The only place I found evidence of oil contamination was in the vinyl hose and S/B vacuum pump. There is no plausible method for oil to enter system. Both "Mooney time" and "Greg_D" experienced a similar problem. All three aircraft are roughly the same age. The problem occurs about +20 years in service. Either it is the vinyl material used in that era or the vinyl hose starts breaking down after a period of time. If it can be done as a minor modification, I plan on installing a CV1J4 filter which is identical to the filter that protects the primary vacuum pump. This is only a stop gap measure until there is a suitable time to replace the hose. Bill
  12. Oil in Standby Vacuum Pump???

    Greg_D What year model is your aircraft and approximately when did you have your problem? Bill
  13. '97 Encore with electric standby vacuum pump located in the avionics bay. The standby pump recently failed during preflight run up checks. Disassembled the pump and found oil in the pump which had caused stuck vanes in the rotor. The inside of the pump was oil wet. Where did the oil come from? The primary engine driven is a dry vacuum pump. Apparently there is enough oil in the line from the manifold where the two pumps connect to the standby pump to cause problems. Any ideas on the source of the oil? I typically only operate the standby pump during preflight run up checks only. How could engine oil get past the primary pump, not foul it and contaminate the standby vacuum system? Bill
  14. Very Low Oil Pressure In Flight

    Inspect the ball and seat of the oil pressure regulator. A very small piece of trash between the ball and seat can cause a large drop in oil pressure. If no trash is found rotate the ball 180 degrees as it will wear slightly where it contacts the seat. Bill
  15. Paul- Mystery solved! After looking closer at the split alternator switch, it is labeled "left and right" not "1 & 2". I knew which switch physically controlled which alternator but never had looked at the split switch label closely until yesterday. I was positive the switch on the left contolled the belt driven driven generator, just did not realize or remember it said "left" not "1". Also I do not have the dual load meter. According to the service manual that stopped with S/N 25-1224. Maybe that is when they changed nomenclature. They did not update the POH with the change to left and right nomenclature. Mine has the exact verbiage you quoted in your earlier post. Thanks for prompting me to go look at my airplane with a more critical eye. Bill