Narrative:

We taxied out to the runway for takeoff and there were thunderstorms that had already moved through the area and another area was north of the airport. We taxied out to the runway and told the tower we were going to need time on the runway to look at the weather. When we lined up on the runway; the radar indicated a cell approximately 15 miles or so from the departure end. We told the tower we would need a right turn immediately after departure and they approved that. The first officer was flying and I told him to be sure and follow the flight guidance after departure so that we would make the turn in time to avoid the weather. I also had the first officer select a non-flex takeoff due to the weather conditions that could occur just prior to entering the runway to look at the weather.the takeoff was normal and a turn was started at 400 feet when heading was selected. As we were making the turn; the weather became moderately turbulent and we were turning inside the cell. At 1000 feet the first officer called for VNAV and I selected it. We continued to get bounced around and the aircraft was not accelerating. I stated several times to the first officer lower the nose to gain airspeed but he was somewhat hesitant to do it enough and deviate from the flight director. Also at the same time I checked to ensure the gear was up and it was. At some point following in the turbulence the stick shaker activated momentarily and I took control of the airplane and lowered the nose. At this point I continued to keep a level attitude and recover and accelerate the airplane and retract the flaps on proper airspeed. While doing this I noticed that the mode control panel had the speed control knob set to manual speeds and not FMS speeds. I commanded the switch to be set to FMS and then continued the climb up to our assigned attitude. At this point controls were transferred back to the first officer and the flight continued.

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Original NASA ASRS Text

Title: EMB-175 flight crew reported having trouble managing airspeed after takeoff in turbulent conditions.

Narrative: We taxied out to the runway for takeoff and there were thunderstorms that had already moved through the area and another area was north of the airport. We taxied out to the runway and told the tower we were going to need time on the runway to look at the weather. When we lined up on the runway; the radar indicated a cell approximately 15 miles or so from the departure end. We told the tower we would need a right turn immediately after departure and they approved that. The First Officer was flying and I told him to be sure and follow the flight guidance after departure so that we would make the turn in time to avoid the weather. I also had the first officer select a non-flex takeoff due to the weather conditions that could occur just prior to entering the runway to look at the weather.The takeoff was normal and a turn was started at 400 feet when HDG was selected. As we were making the turn; the weather became moderately turbulent and we were turning inside the cell. At 1000 feet the first officer called for VNAV and I selected it. We continued to get bounced around and the aircraft was not accelerating. I stated several times to the first officer lower the nose to gain airspeed but he was somewhat hesitant to do it enough and deviate from the flight director. Also at the same time I checked to ensure the gear was up and it was. At some point following in the turbulence the stick shaker activated momentarily and I took control of the airplane and lowered the nose. At this point I continued to keep a level attitude and recover and accelerate the airplane and retract the flaps on proper airspeed. While doing this I noticed that the mode control panel had the speed control knob set to manual speeds and not FMS speeds. I commanded the switch to be set to FMS and then continued the climb up to our assigned attitude. At this point controls were transferred back to the First Officer and the flight continued.

Data retrieved from NASA's ASRS site 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.