Narrative:

We departed from dca on mar/wed/04, in the late afternoon using runway 1. We were heavy, and shortly after takeoff, I began a turn toward the river/departure radial, using approximately 10-15 degrees of bank. When we switched to departure frequency, the controller directed us to turn immediately to avoid restr airspace. We were in a turn at the time of the controller's call and in IMC conditions. I immediately increased the bank angle to 30 degrees of bank and continued the turn using 30 degrees of bank, the controller restated a call for us to turn, and I kept the bank of 30 degrees until I had established an intercept heading for the departure radial. We intercepted the radial and continued our climb out. The following day, FAA informed us we had entered restr airspace. I was surprised by the initial call from ATC to turn immediately. The only reason I can think of, which would cause this situation would be not enough bank or inadequate intercept heading to prevent going into restr airspace. Obviously, if either (or both) of these were the cause, the corrective action would be steeper bank and larger intercept heading.

Related reports:

Google
 

Original NASA ASRS Text

Title: UNAUTH PENETRATION OF P56 PROHIBITED AREA BY AN MD88 IN A TURN OFF RWY 1 DEP AT DCA, DC.

Narrative: WE DEPARTED FROM DCA ON MAR/WED/04, IN THE LATE AFTERNOON USING RWY 1. WE WERE HVY, AND SHORTLY AFTER TKOF, I BEGAN A TURN TOWARD THE RIVER/DEP RADIAL, USING APPROX 10-15 DEGS OF BANK. WHEN WE SWITCHED TO DEP FREQ, THE CTLR DIRECTED US TO TURN IMMEDIATELY TO AVOID RESTR AIRSPACE. WE WERE IN A TURN AT THE TIME OF THE CTLR'S CALL AND IN IMC CONDITIONS. I IMMEDIATELY INCREASED THE BANK ANGLE TO 30 DEGS OF BANK AND CONTINUED THE TURN USING 30 DEGS OF BANK, THE CTLR RESTATED A CALL FOR US TO TURN, AND I KEPT THE BANK OF 30 DEGS UNTIL I HAD ESTABLISHED AN INTERCEPT HDG FOR THE DEP RADIAL. WE INTERCEPTED THE RADIAL AND CONTINUED OUR CLB OUT. THE FOLLOWING DAY, FAA INFORMED US WE HAD ENTERED RESTR AIRSPACE. I WAS SURPRISED BY THE INITIAL CALL FROM ATC TO TURN IMMEDIATELY. THE ONLY REASON I CAN THINK OF, WHICH WOULD CAUSE THIS SIT WOULD BE NOT ENOUGH BANK OR INADEQUATE INTERCEPT HDG TO PREVENT GOING INTO RESTR AIRSPACE. OBVIOUSLY, IF EITHER (OR BOTH) OF THESE WERE THE CAUSE, THE CORRECTIVE ACTION WOULD BE STEEPER BANK AND LARGER INTERCEPT HDG.

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.