An MD83 first officer encountered wake vortex from a preceding A320 on takeoff from las that produce...

Narrative:

[At las] we were in an MD83 and cleared to take off behind an airbus 320. They had just initiated their takeoff rotation and we were cleared for takeoff while already in position. There was no wind and clear skies. As soon as we passed 500 ft AGL the controls started to fight me in a roll situation. I figured it was the wake of the airbus and corrected while climbing. As we climbed it became more and more pronounced until at 2;000 ft AGL I had completely run out of aileron controls (full stops on the yoke to the right) and was quickly running out of right rudder. The plane continued to roll. I seriously thought we were going to roll over; and then we finally broke free and told tower we were turning off the SID due to wake turbulence.the problem lies in forcing a plane to take off immediately after another has rotated and forced to follow a specific path identical to that plane. We were also forced to comply with 220 KTS on the departure - thus also forcing greater wake turbulence (heavy; clean and slow). We were left with no options to break free from the wake of the prior aircraft. I've also had wake turbulence problems with a variety of other aircraft (albeit not so severe) on this same departure. After 6 miles of separation you are cleared for the exact same departure. This just isn't enough room to avoid wake turbulence.

Original NASA ASRS Text

Title: An MD83 First Officer encountered wake vortex from a preceding A320 on takeoff from LAS that produced a powerful roll that took full control deflection to counter. The reporter cited ATC procedure in not providing enough in-trail spacing; although it is not clear why the clearance was not refused.

Narrative: [At LAS] we were in an MD83 and cleared to take off behind an Airbus 320. They had just initiated their takeoff rotation and we were cleared for takeoff while already in position. There was no wind and clear skies. As soon as we passed 500 FT AGL the controls started to fight me in a roll situation. I figured it was the wake of the Airbus and corrected while climbing. As we climbed it became more and more pronounced until at 2;000 FT AGL I had completely run out of aileron controls (full stops on the yoke to the right) and was quickly running out of right rudder. The plane continued to roll. I seriously thought we were going to roll over; and then we finally broke free and told Tower we were turning off the SID due to wake turbulence.The problem lies in forcing a plane to take off immediately after another has rotated and forced to follow a specific path identical to that plane. We were also forced to comply with 220 KTS on the departure - thus also forcing greater wake turbulence (heavy; clean and slow). We were left with no options to break free from the wake of the prior aircraft. I've also had wake turbulence problems with a variety of other aircraft (albeit not so severe) on this same departure. After 6 miles of separation you are cleared for the exact same departure. This just isn't enough room to avoid wake turbulence.

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.

Attributes
ACN	938682
Time
Date	201002
Local Time Of Day	0601-1200
Place
Locale Reference	LAS.Airport
State Reference	NV
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	MD-83
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Route In Use	SID STAAV
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 255 Flight Crew Total 6000 Flight Crew Type 2000
Events
Anomaly	Inflight Event / Encounter Wake Vortex Encounter

An MD83 first officer encountered wake vortex from a preceding A320 on takeoff from las that produced a powerful roll that took full control deflection to counter. The reporter cited ATC procedure in not providing enough in-trail spacing; although it is not clear why the clearance was not refused.