A pilot new to the mu-2 had difficulty maintaining an ATC mandated 150 KTS after takeoff because of ...

Attributes
ACN	837901
Time
Date	200906
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	Mixed
Light	Dusk
Aircraft 1
Make Model Name	MU-2 Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb Takeoff
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying Single Pilot
Qualification	Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 2000 Flight Crew Type 50
Events
Anomaly	Deviation - Procedural Clearance Deviation - Speed All Types

Narrative:

Tower advised maintain 150 KTS or less on departure. After takeoff our normal procedure is to accelerate to 130 and then flaps 5. Accelerate to 150 and flaps up. Then accelerate to 180 for minimum climb speed in icing. As the flaps came from 5 to up the airplane accelerated quickly to 170. I was unable to raise the nose past the 13 degree maximum deck angle per the pilot operating manual and yet we still were accelerating. I reduced the power; which slowed our climb rate and by that time the speed was coming back under control. Departure asked us to check our airspeed at just about the time I was able to reduce the speed back to 150. New to this type airplane and now understand it may have been better to maintain flaps 20 or flaps 5 in order to keep the speed to 150; or be much more aggressive with the power reduction. On takeoff I didn't have any concern about controlling the speed; I thought it would be easy; but when I reached maximum aoa and still speeding I realized I mis-judged the performance at this sea level cool day. Next time; set maximum deck angle and use power levers to maintain speed and climb more closely.

Original NASA ASRS Text

Title: A pilot new to the MU-2 had difficulty maintaining an ATC mandated 150 KTS after takeoff because of lack of experience with aircraft's takeoff performance.

Narrative: Tower advised maintain 150 KTS or less on departure. After takeoff our normal procedure is to accelerate to 130 and then Flaps 5. Accelerate to 150 and flaps up. Then accelerate to 180 for minimum climb speed in icing. As the flaps came from 5 to up the airplane accelerated quickly to 170. I was unable to raise the nose past the 13 degree maximum deck angle per the pilot operating manual and yet we still were accelerating. I reduced the power; which slowed our climb rate and by that time the speed was coming back under control. Departure asked us to check our airspeed at just about the time I was able to reduce the speed back to 150. New to this type airplane and now understand it may have been better to maintain Flaps 20 or Flaps 5 in order to keep the speed to 150; or be much more aggressive with the power reduction. On takeoff I didn't have any concern about controlling the speed; I thought it would be easy; but when I reached maximum AOA and still speeding I realized I mis-judged the performance at this sea level cool day. Next time; set maximum deck angle and use power levers to maintain speed and climb more closely.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

A pilot new to the mu-2 had difficulty maintaining an ATC mandated 150 KTS after takeoff because of lack of experience with aircraft's takeoff performance.