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  1. Dan Thomas

    Cessna Generator Troubleshooting

    If the battery has been run way down on a cold start, that alternator could easily run up to its 50 or 60 amps at 1200 RPM, trying to get that battery back up. A 30-amp breaker would pop, leaving you resetting it and idling for a long time while the voltage slowly recovered. Best to do the job...
  2. Dan Thomas

    Back pressure needed on takeoff & landings in a C172

    This is what some mechanics do, and it's wrong. The service manual appropriate to the model should be consulted. For the 172, it will tell you to run the trim wheel to full nose-down position, stop blocks loose so that the chain ends are determining max travel when they hit a sprocket, and then...
  3. Dan Thomas

    Back pressure needed on takeoff & landings in a C172

    The only designated stops in the elevator system are at the elevator itself. If the system is incorrectly rigged, the control column will strike either the backside of the instrument panel before the up-elevator strop is reached, or the firewall before the down stop is reached. This is very...
  4. Dan Thomas

    RPM loss

    Not likely. Why would the power come back again? And how would that make the idle RPM wander around? Venting issues have brought down numerous homebuilts. Everything runs fine on the ground, but in flight the engine quits. That might have to do with differential pressures in venting between...
  5. Dan Thomas

    Zinc additive by rislone ZDDP

    From Lycoming: https://www.lycoming.com/sites/default/files/attachments/SI1014N%2520Lubricating%2520Oil%2520Recommendations.pdf From Continental: https://pceonline.com/wp-content/uploads/2017/04/M-0standardpractice2017-01-15.pdf
  6. Dan Thomas

    Cessna Generator Troubleshooting

    If the referral to 43.13 is in the manual, the installer has no excuse. "Incorporated by reference" is the legal term we use here in Canada. Might be the same in the US.
  7. Dan Thomas

    Zinc additive by rislone ZDDP

    Read this: https://generalaviationnews.com/2017/05/22/for-oils-its-all-about-the-chemistry/ Basically, zinc can attack copper-based alloys like the bronze valve guides commonly used in aircraft engines, and the rocker bushings. Being a metal, it forms deposits in the cylinder that glow and can...
  8. Dan Thomas

    RSV vaccine

    Huh. After all, those flights I made through the Rocks in Skyhawks. As an instructor, too. Good thing we didn't know it was so dangerous. We would never have trained so many students in safe mountain flying, and what the risks were. We'd have stayed over the cities and the big flat farms. Or...
  9. Dan Thomas

    Cessna Generator Troubleshooting

    Mechanics that don't or won't or can't read the installation instructions.
  10. Dan Thomas

    Carburetor Intake Cessna 182

    Yes. There is, and it should be a 100-hour item.
  11. Dan Thomas

    Cessna down after stalling on take off

    When towing gliders on hot days in the 1970s, I took both doors off the Auster. Lost two cowboy hats when I slipped down after glider release. I used to toss the hat into the back while I flew, but in the slip the gale through the cabin cleaned out all the dirt. And my hat. Twice. Slow learner.
  12. Dan Thomas

    RPM loss

    That's bad. All spark hanging on one little box, its power supply, it's MP sensor, its trigger. If there's a flaw anywhere, you get the symptoms you have.
  13. Dan Thomas

    Would you be interested in some form of back-up propulsion for your piston single? If yes, how much would you be willing to pay for it?

    Oh really? They are available as STC'd installations for several certified aircraft models. Their website seems to be down right now so I can't get the Approved Models List.
  14. Dan Thomas

    Carburetor Intake Cessna 182

    I have encountered those boots patched with red RTV. Really bad idea. If a bit of RTV breaks off and gets sucked into the intake, bad things happen. I know of a floatplane that had to abort the takeoff when a flake of paint from inside the intake duct broke off and got into the carb's secondary...
  15. Dan Thomas

    Cessna down after stalling on take off

    They did up until 1966 or so. https://en.wikipedia.org/wiki/Cessna_210_Centurion The airplane in this crash was a new, cantilevered-wing airplane, and the door was probably tied to the wing-mounted doorstop. Still a very stupid idea. Even if they had gotten away with it, the wind at even 100...
  16. Dan Thomas

    RPM loss

    It will be a bit slow because it has to squeeze past the bypass check valve in the fuel pump. If that was really a problem (a restriction somewhere), the engine would die and pretty much stay half-dead, and it likely wouldn't go to idle all that quickly. Spark. 90% of the time it's the spark...
  17. Dan Thomas

    121.5 ELT to 406 ELT

    The Installation Manual for the ME406 ELT. It might be the one the OP has, or it might be another Artex 406. https://www.peter2000.co.uk/aviation/kannad-elt/artex-me406-570-1600_Manual.pdf Note that the earlier version of this ELT had the Velcro strap retaining it in the mount. These straps...
  18. Dan Thomas

    Carburetor Intake Cessna 182

    Got to buy it. I don't know where you'd find that bellows, and Cessna likely has it made under contract, with an agreement that they are the only buyer. I think the boot is available separately. Don't have the parts catalog handy right now.
  19. Dan Thomas

    Would you be interested in some form of back-up propulsion for your piston single? If yes, how much would you be willing to pay for it?

    Sure, and that's at 2200 RPM. it doesn't take much more RPM loss before you start sinking.
  20. Dan Thomas

    Would you be interested in some form of back-up propulsion for your piston single? If yes, how much would you be willing to pay for it?

    The 150 uses that engine. That chart shows the HP generated at various RPM when loaded with a propeller appropriate to the airplane. My experience is that endurance flight is near Vy, which is close to best L/D or best glide, and 2000 RPM is about the minimum to do that. Have you flown a 150...
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