+Mike R Jenn R Hi Mike, you own a Duke? Would you feel comfortable flying the engines past TBO about 2-300 hours, say to 1800-1900 hours, assuming frequent oil changes and good compressions? I've also read that you have to check the condensation bleed valves under the belly if its been repainted, and for any corrosion on the magnesium tail section. Any suggestions on preventing corrosion? Have you ever had issues with the pressurization system? On a test flight, what would alert you to any pending issues there?
+Matt Robinson, Matt yes I have a B model P439 1977 year and I am very near TBO and I would fly mine past that and feel comfortable, I recommend getting a oil analysis every oil change to track the wear in the motor. I fly mine probably much differently than most other guys do. Call me sometime and I can discuss. The outflow valves I have noticed have a tendency to get dirt around the seals. The rear pressure vessel partition has a foam attached to it for sound proofing that when old it will flake off and cause problems with the out flow. Checking this in the ground before flight is kinda hard. I know when mine starts to get dirty as it will pop open and closed on takeoff and landing. There is also a filter for the system just under the copilot's dash that can cause some problems. I love my plane. Works Great. It's a very fast Tank!
Mike R Jenn R Thanks Mike. I'm in the process of making an acquisition on a plastic recycle plant in St Cloud Minnesota. I currently reside in Duncan, Ok where I'm from originally. Once the plant is operating to full capacity, I want to purchase a nice twin and the Duke's pressurization and Lycoming engines are what I like most, despite its maintenance and fuel costs. There is a 1977 model listed for $115,000 on Controller, which is a great buy. I believe its selling for this since engines are just over 1,500 hours. If I do buy one, I'd want an expert to go along to look it over. And yes I would enjoy learning about yours. My cell is 405.818.1421. Thanks!
Nice job. I see you split your manifold as well, mine run about a 1" off from each other
+Mike R Jenn R Hi Mike, you own a Duke? Would you feel comfortable flying the engines past TBO about 2-300 hours, say to 1800-1900 hours, assuming frequent oil changes and good compressions? I've also read that you have to check the condensation bleed valves under the belly if its been repainted, and for any corrosion on the magnesium tail section. Any suggestions on preventing corrosion?
Have you ever had issues with the pressurization system? On a test flight, what would alert you to any pending issues there?
+Matt Robinson, Matt yes I have a B model P439 1977 year and I am very near TBO and I would fly mine past that and feel comfortable, I recommend getting a oil analysis every oil change to track the wear in the motor. I fly mine probably much differently than most other guys do. Call me sometime and I can discuss. The outflow valves I have noticed have a tendency to get dirt around the seals. The rear pressure vessel partition has a foam attached to it for sound proofing that when old it will flake off and cause problems with the out flow. Checking this in the ground before flight is kinda hard. I know when mine starts to get dirty as it will pop open and closed on takeoff and landing. There is also a filter for the system just under the copilot's dash that can cause some problems. I love my plane. Works Great. It's a very fast Tank!
Mike R Jenn R Thanks Mike. I'm in the process of making an acquisition on a plastic recycle plant in St Cloud Minnesota. I currently reside in Duncan, Ok where I'm from originally. Once the plant is operating to full capacity, I want to purchase a nice twin and the Duke's pressurization and Lycoming engines are what I like most, despite its maintenance and fuel costs. There is a 1977 model listed for $115,000 on Controller, which is a great buy. I believe its selling for this since engines are just over 1,500 hours.
If I do buy one, I'd want an expert to go along to look it over. And yes I would enjoy learning about yours. My cell is 405.818.1421. Thanks!
Matt Good Deal.
What NavComs are in that?