This experiment was not as successful as the previous one using plants as an interface (I wasn’t able to exactly replicate all of the types of interactions that the author’s of the Touché paper did), but, what I learned may provide some clues with how to go about improving a Touché based – water interface in future, longer term projects. Some general materials you’ll need in order to get organized are a pond liner, perforated PVC piping, a growth medium and bog plants. Rain gardens are shallow depressions in the ground that collect water from roofs and gutters and allow it to soak into the ground. A mixture of salt, vinegar, and water should remove mildew stains on most fabrics. Moving water has an additional component added to account for the kinetic energy of the flow. Aryanto claimed that he only required 1 liter of water for the distance of 500 kilometers.

Gleick and his team are behind the Water Conflict Chronology: a log of 925 water conflicts, large and small, stretching back to the days of the Babylonian king Hammurabi. These are scrubbers on short booms that can move around to the front and rear of the vehicle, scrubbing those vertical surfaces as well. Roots can form within ten days to two weeks. March 25, 2009. The data indicate a likely separation of the airflow over the wing and ensuing roll two seconds after the stick shaker activated while the aircraft was slowing through 125 knots, and while at a flight load of 1.42 Gs. Ranter, Harro. “ASN Aircraft accident de Havilland Canada DHC-8-402Q Dash 8 N200WQ Buffalo Niagara International Airport, NY (BUF)”. WBEN (AM) 930 Buffalo. In February 2019, to mark the 10th anniversary of the crash, ceremonies were held in Buffalo and the surrounding area in remembrance of the victims. Carey, Elizabeth (February 13, 2009). “Buffalo area plane crash claims 50 lives”. Yutangco, Precious (February 13, 2009). “49 killed after plane crashes into home near Buffalo”. On February 2, 2010, the NTSB issued its final report, describing the details of its investigation that led to 46 specific conclusions. The NTSB issued safety recommendations to the FAA to strengthen the way airlines check into the background of pilot applicants, including requiring previous employers to disclose training records and records of any previous failures.

One way to resolve this problem is to install a roller on the plow blade, which allows the blade to roll over any uneven portions of the pavement. We’re systematic. One HVAC vent gets our attention at a time. One examiner told an aviation magazine that he is not allowed to fail any applicant for losing altitude in a simulated stall, so long as the pilot is able to regain the original altitude. Investigators also scrutinized the Practical Test Standards for ATP certification, which allowed for an altitude loss of no more than 100 ft (30 m) in a simulated stall. New standards subsequently issued by the FAA eliminate any specific altitude loss stipulation, calling instead for “minimal loss of elevation” in a stall. The NTSB theorized that due to this low tolerance in a tested simulation environment, pilots may have come to fear loss of altitude in a stall, and thus focused primarily on preventing such a loss, even to the detriment of recovering from the stall itself. It was later determined that the stick shaker trigger had been set improperly, so when the stick shaker engaged, the aircraft was not actually in or near a stall condition. The yearly event started in 1991 with 125 aircraft.

Note: The predicted stall speed for this aircraft at a flight load of 1.42 Gs would be about 125 kt, which is arrived at by multiplying 105 kt (the predicted stall speed at 1 G) by 1.19164 (the square root of the flight load in Gs). The predicted stall speed at a load factor of 1 G would be about 105 knots. The same type of pilot errors and violations of standard operating procedure had been found in other accidents in which fatigue was not a factor. She compared the 20 years that fatigue had remained on the NTSB’s Most Wanted List of transportation safety improvements, during which no meaningful action was taken by regulators in response, to the changes in tolerance for alcohol over the same period, noting that the impact on performance from fatigue and alcohol were similar. The episode reused the same dramatization as had the Mayday episode. The dramatization was broadcast with the title “Stalled in the Sky” in the United Kingdom. Flying the plane manually was essential to ensure that pilots would be able to detect changes in the handling characteristics of the airplane, which are warning signs of ice accumulation. In response to questioning from the NTSB, Colgan Air officials acknowledged that both pilots had not been paying close attention to the aircraft’s instruments and did not properly follow the airline’s procedures for handling an impending stall.