but at a 30-degree angle, the angle of the king s cross escalator, the flames leaned into the shaft at an angle and raced upwards. in the confined trench, the fire could only draw air from below, creating a draft. because the air can t come round the fire, it has to come effectively through the fire. investigators then ran a bigger test on a one-third sized model of the complete king s cross station. if the trench effect worked this time, it would prove their theory was right. in a matter of three or four seconds, the flames went from being upright to being lying along the escalator trench. and from then on, it was just as we had predicted, which is very gratifying. it is clear the previously unknown phenomenon called the trench effect was real. now we understand. it s now all obvious. it fits together. the jigsaw fits together perfectly.
angle of the king s cross escalator, the flames leaned into the shaft at an angle and raced upwards. in the confined trench, the fire could only draw air from below, creating a draft. because the air can t come round the fire, it has to come effectively through the fire. investigators then ran a bigger test on a one-third sized model of the complete king s cross station. if the trench effect worked this time, it would prove their theory was right. in a matter of three or four seconds, the flames went from being upright to being lying along the escalator trench. and from then on, it was just as we had predicted, which is very gratifying. it is clear the previously unknown phenomenon called the trench effect was real. now we understand. it s now all obvious. it fits together. the jigsaw fits together perfectly.
into the shaft at an angle and raced upwards. in the confined trench, the fire could only draw air from below, creating a draft. because the air can t come round the fire, it has to come effectively through the fire. investigators then ran a bigger test on a one-third sized model of the complete king s cross station. if the trench effect worked this time, it would prove their theory was right. in three or four seconds the flames were from upright, then lying along the escalator trench. from then on, it was just predicted which is very gratifying. it is clear the previously unknown phenomenon called the trench effect was real. now we understand. it s now all obvious. it fits together. the jigsaw fits together perfectly. the investigative team now