EuroHarmony Community Forums
Archive => EuroHarmony VA => Old Forum => Technical discussions => Topic started by: EHM-2155 Mariano on August 14, 2007, 12:32:36 pm
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Hello, first post here :P
I'm trying to fly the 1900D by the charts and it says that by FL 150 i should be flying close to 250 kts... though i cant get this bird to fly that fast... are the charts in Ground AS? insted of IAS?
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The 1900 won't hit 250 KIAS very often :0 I tend to go down the road at about 140-170 KIAS depending altitude.
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Even KTAS won't be that high at FL150...
I'm guessing it's a typo. (And we'll discuss your forum username later... :D)
EDIT: Well, strap me vitals... according to Raytheon -
Performance
* Maximum speed: Maximum operating speed 248 knots IAS (285 mph, 459 km/h) to 13,200 ft (4,020 m)[10].
* Cruise speed: 260 knots (True Airspeed) (300 mph, 480 km/h)
* Stall speed: 84 knots (IAS) (97 mph, 156 km/h)
* Range: 1,498 nm (1,724 mi, 2,776 km)
* Service ceiling: 25,000 ft (maximum certificated altitude) (7,600 m)
* Rate of climb: ~2,000 ft/min (~10 m/s)
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Yes i usually cruise at 175-185 KIAS, and my flights are about on schedule... interesting :P
Love the aircraft though, i was so used to jets that this thing is like so cute xD
Edit:
One other thing, is there any way to turn on the auto throttles on this one? I click auto feather, and then the Speed on the autopilot, all it does is set the autopilot's LED with my current speed... Using the default panel that comes with the 2004 download.
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Hi Mariano,
actually if you read a similar data from cruise speed, that is always KTAS, or GS. If it is written simply: knots or kts, that is never IAS speed that you can read from your gauges.
You can open up the GPS window any time to check your ground speed. And you will notice, you can easily reach 260kts with the Beech. ;) Unfortunately, there is not an autothrottle function on that one. On smaller prop planes, it is possible to activate a kind of motor RPM hold function as speed hold, which can help you a little. I am not sure if it was modelled on the Beech. ;)
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Cool, allright... that would do more sense then...
Thanks a lot for the help everyone!
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Mariano, autofeather is more of a built in safety feature from what i can gather......it basically puts the blades of the prop parallel to the line of flight in some emergency situations i think. It has nothing to do with autothrottle.
jim
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The autofeather system, is monetring the engine torque output, and will if the torque of the engine drops below a level where it contributes to giving power to the aircraft, feather the propeller on the relevant engine. Placing the propeller blades in the postion where they create the lowest drag. So it's not a systems that control the engines in any way, just monitor the torque level on the engines. In case of a engine failure above V1 on a prop aicraft this sytem is redusing the time the failured engines propeller create extra drag, and therefore is a great safety enhachment.
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aha, so that's what the autofeather is doing, so it should be turned on all the time when airborn?
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You won't need it on when taxing on the ground but I suppose it's turned on during the after engine start checklist, you must add some torque to test it to my knowledge. You can test how it works by shutting down one engine in midflight;)
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It's usually turned off when airborne during the after t/o check and then turned on again in the approach check AFAIK.
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Yesh, I went on reading about props after posting here and found out what feather was, so no luck with my autopilot there then. I'll try setting autofeather and set an engine failure see what happens.