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Found 6 results

  1. Does anybody here know what the retirement life is for the blades on a Sikorsky S-70i? It seemes nearly impossible to find maintenance manuals for any of the Sikorsky aircrafts and and any technical manuals I find include just about everything except the blades. Thank you!
  2. What's the cylinder on the top of the bell 505 rotor hub?
  3. #1 A small rotor is operating at high rpm and or pitch with a high downwash velocity, #2 or a larger rotor is operating at lower rpm with lower downwash velocity. So the answer from my book is the rotor with greater induced velocity will require the most horsepower. since the larger rotor blade creates less downwash velocity does that mean it creates less induced velocity? So in practical terms what's more efficient a UH 1 high aspect ratio or small narrow rotors with greater numbers like an MD500. Note that this is not stuff required for the FAA exam, just additional knowledge. The FAA stuff doesn't get too nitty gritty on aerodynamics. The FAA book doesn't cover this
  4. Just found out about this interesting Chinese variant of the MQ-8 Fire scout UAV helicopter, one thing I notice is the strange rotorhub. Anybody have any details on this interesting helo? Look closely at the MQ-8 Fire scout compared to the Chinese SVU-200 Rotor hub design, if you look closely it has no pitch links, I think they're hidden inside the shaft, like the swiss marenco helicopter. Very interesting
  5. Hi guys, I'm looking for a drawing/diagram that shows the belt drive transmission on the Robinson R44 I searched but couldn't find anything but this
  6. Has anyone ever heard of an R22 engine overspeed that was between 110 & 116%, but left the rotor below 110% (split needles)? Can belts normally slip like that with a sudden increase in throttle/torque or A> There is an issue with the belt tension settings B> The flight crew's perception/interpretation of the tachs was incorrect C> Something else? If it was A> is there anything you could detect on a preflight or on engine run-up (blades taking more than 5 seconds to turn etc?) Regards
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