Instructor pilot reporter may have entered class B airspace without clearance.

Attributes
ACN	309440
Time
Date	199507
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude cruise other cruise other
Flight Plan	None
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : cfi pilot : commercial
Experience	flight time last 90 days : 50 flight time total : 625
ASRS Report	309440
Person 2
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : student
Events
Anomaly	non adherence : far other anomaly other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited penetrated airspace flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During climb out, told student to climb to 4000 ft to do stalls. At 3900 ft, I realized that we climbed extremely fast, possibly due to cool WX and we appeared to be on the edge of the outer ring of class 'B' airspace. The floor at this point is 4000 ft. I descended to 3500 ft. Don't know how close I really was. I need to be more aware of the climb rate and maintain only 3500 ft until past some known landmarks.

Original NASA ASRS Text

Title: INSTRUCTOR PLT RPTR MAY HAVE ENTERED CLASS B AIRSPACE WITHOUT CLRNC.

Narrative: DURING CLB OUT, TOLD STUDENT TO CLB TO 4000 FT TO DO STALLS. AT 3900 FT, I REALIZED THAT WE CLBED EXTREMELY FAST, POSSIBLY DUE TO COOL WX AND WE APPEARED TO BE ON THE EDGE OF THE OUTER RING OF CLASS 'B' AIRSPACE. THE FLOOR AT THIS POINT IS 4000 FT. I DSNDED TO 3500 FT. DON'T KNOW HOW CLOSE I REALLY WAS. I NEED TO BE MORE AWARE OF THE CLB RATE AND MAINTAIN ONLY 3500 FT UNTIL PAST SOME KNOWN LANDMARKS.

Data retrieved from NASA's ASRS site as of July 2007 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.