May it be safer to use less power on takeoff?

Discussion in 'Flight Following' started by Bradley W, Nov 11, 2017.

  1. Radar Contact

    Radar Contact Cleared for Takeoff

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    Maybe...after reading the OP's random thought of the day, the first thing that popped in my mind was Hunt for Red October. I may have mis-quoted.
     
  2. Kritchlow

    Kritchlow Final Approach

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    I've alluded to this before, but now I'll spell it out...

    Holy crap... in a single engine piston aircraft use every freekin ounce of power available.
    Push the throttle to the firewall, then keep pushing.
     
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  3. Clark1961

    Clark1961 Touchdown! Greaser!

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    You prolly should never get in a fixed wastegate turbocharged spam can...
     
  4. Kritchlow

    Kritchlow Final Approach

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    No I haven't. Do they recommend partial power takeoffs?? I suppose possibly since it's a "fixed" wastegate.

    So I'll remodel my statement to "turbocharged aircraft without fixed wastegates should shove the power full, and then some."

    Better??
     
  5. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    Every turbofan I've been involved with, when performing power assurance engine runs, we are to verify "cushion". What does that mean?
     
  6. Clark1961

    Clark1961 Touchdown! Greaser!

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    That’s mo better.:) It’s not that a “partial power” takeoff may or may not be recommended. It’s more that over boost is discouraged. And there should be power settings which include fuel flow for less than max power.

    Anyway if I were to shove the throttle full forward and leave it there an engine tear down would follow because boost limits were exceeded.
     
  7. paflyer

    paflyer Final Approach

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    [​IMG]
     
  8. Bradley W

    Bradley W Ejection Handle Pulled

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    The auto throttle after setting landing speed really really, damages the engine on the boeing 717 with the thrust settings changing every few seconds.
     
  9. jordane93

    jordane93 Final Approach

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    That’s why I always make small corrections in my jet. Don’t want to shock cool the engines. Always do a run up as well and check both mags.
     
    Last edited: Nov 11, 2017
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  10. Velocity173

    Velocity173 Final Approach

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    Taxied way too fast in parking. Good way to overheat the brakes. Well, both engines need to be replaced, might as well replace the brakes while they're at it.
     
  11. Pilawt

    Pilawt Final Approach

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    That’s for noise reduction. Cylinders blowing out the sides of the cowl in a Turbo Arrow at full throttle at sea level make a heckuva racket.

    :D

    (41” is redline manifold pressure. It takes about 1/2 throttle travel to get there at sea level.)
     
  12. Ryanb

    Ryanb Final Approach PoA Supporter

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    I must ask, are you an airline pilot or do you have any experience at all with flying turbine aircraft? Some posts suggest you may, but I really have my doubts by the context they’re posted in.
     
    Last edited: Nov 11, 2017
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  13. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    Sarcasm abounds.
     
  14. midlifeflyer

    midlifeflyer Final Approach

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    You probably know it doesn’t take much more than that at a mile high (and higher) airport . I used to fly one in the Rockies.

    Thread creep: do you use the full 41 for takeof? I’ve seen techniques using less.
     
  15. Clark1961

    Clark1961 Touchdown! Greaser!

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    I rarely use full power if there is plenty of runway. About 35” is fine. It is a real good idea to check fuel flow when setting power on a TSIO-360.
     
  16. midlifeflyer

    midlifeflyer Final Approach

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    Yep. I found my old personal checklist and it was the technique I used when I flew T-Arrows. I’ve been trying to get a handle on how common it is.
     
  17. Checkout_my_Six

    Checkout_my_Six Final Approach

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    I'm surprised no one mentioned it......de-fueling helps too. :eek:
     
  18. Clark1961

    Clark1961 Touchdown! Greaser!

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    Over the years as I’ve learned more about the engine I’ve become very comfortable operating it at selected power levels rather than max or one of the specific settings in the power table in the POH. As long as the setting is on trend with the table and not in the “avoid” zone the engine can be very happy. Getting the fuel flow balanced using GAMIs helped a lot.

    The total fuel flow has to be set up on spec too. TCM calls for fuel trim to be checked annually. It’s best to set it by the book and not try to seat of the pants it because of the dependencies in the fuel controls.

    The last piece of the puzzle for the engine is ignition. It’s been happiest with fine wire plugs. It gets real unhappy if ya don’t lean for idle on the ground and use conventional plugs.
     
  19. deonb

    deonb Pattern Altitude

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    Yip. I know what you were going for :).

    "Captain - Engineer reports 105% on the reactor possible - but not recommended..."
    "Go to 105 on the reactor."
    "Captain, what is it? Where are we going?"
    "We're going to kill a friend, Yevgeni. We're going to kill Ramius."


    PS: I did not have to Google that...
     
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  20. midlifeflyer

    midlifeflyer Final Approach

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    @Clark1961, I have to chuckle at your use of "happy" referring to the airplane. There’s a very experienced instructor in my area who uses the term Vh - "happy speed" to refer to the performance one gets when the engine is at the power settings at which it performs best.
     
  21. Checkout_my_Six

    Checkout_my_Six Final Approach

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    yup.....don't forget to lean forward bro.;)
     
  22. teejayevans

    teejayevans Pattern Altitude

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    Remembering the lines is one thing, but spelling the names? You didn’t have to google Yevgeni?
     
  23. Clark1961

    Clark1961 Touchdown! Greaser!

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    We all know that engines can be unhappy flying over water or in the dark. I put an extra light under the cowl so the engine can’t know it’s flying at night. Haven’t figured out how to keep it from knowing it’s over water.
     
  24. Capt. Geoffrey Thorpe

    Capt. Geoffrey Thorpe Touchdown! Greaser!

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    FIFY...
     
  25. deonb

    deonb Pattern Altitude

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    Well, the spelling isn't really correct either way. The original spelling is Евгений. Which can be Yevgeni, Evgeny, Jevgénij or probably a bunch of other combinations of E's, Y's and I's that all sound like that.

    I worked with a guy with the first spelling once, so I picked that one :)
     
    Last edited: Nov 12, 2017
  26. Zeldman

    Zeldman Final Approach

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    Review board: Captain, why did you have power set at 120% during the wind shear incident?

    Captain: Because that is all I could get.....
     
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  27. mscard88

    mscard88 Touchdown! Greaser!

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    Leave the rafts back in the hanger?