Beijing’s blaze of environmentally friendly color
Print Edition
THE Beijing sky was a blaze of color yesterday when almost 200 aircraft flew over Tian’anmen Square during the victory parade.
They included airborne warning and control system aircraft, bombers, fighters and maritime patrol aircraft with many of them leaving trails of colored smoke.
People were curious how the trails were created and more than 140 accounts made mention of them on Sina’s Weibo microblog service.
The Bayi (August 1) Team aerobatics squadron brought their new liquid smoke generators to the parade.
“The liquid smoke generators are installed under the belly,” Cao Zhenzhong, Bayi’s commander said.
They work when high-boiling-point reagents pour into the engine casing. With nitrogen, the smoke sprays into the exhaust coming from the engine, and transforms into steam, he said.
The steam then turns into a form of fog as it cools.
The success of the display was achieved after dozens of trials of varying formulas and nozzle adjustments.
White is the most simple reagent, being made of diesel, lubricating oil, kerosene, or even soybean oil, according to cannews.com.cn.
Other colors require ingredients with higher boiling points and dyes.
During the trials, soybean oil was used as it was the most environmentally friendly ingredient.
Other environmentally non-toxic raw materials were used, but final details were not released.
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