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In any case, Bombardier has guaranteed Porter that the plane will meet the limits. Consultants also conclude that the new jets – part of a quieter, cleaner new generation of aviation technology – will meet air-pollution standards."
This is the main argument of Porter. It is not true.
Bombardier C series uses PW1000C engine, which is a
very successful geared turbofan engine (jet). As claimed by Porter, it is cleaner and quieter - BUT (here is the catch) than comparable other turbofan engines (jets).
It is not cleaner and quieter than Q400.
All emissions of CS100 is actually
higher than Q400.
CS100 claims it achieves 56% to the margin of CAEP6 in NOx emission, which is an excellent value,
but still cannot beat a turboprop engine. Same story with other emissions.
Also note that, those emission values are given as grams of pollutant per KN thrust (g/KN). Just looking at the weight of the planes (29,000 kgs vs 58,000 kgs) you can clearly see that CS100 would produce
more emission than Q400.
Technical note:
I used weight to compare, as Q400 has power producing engines (not thrust) and CS100 has thrust producing engines (not power). It is not simple to convert one into other. As per catalog values, NOx emisson of Q400 is 21.2 g/KN and CS100 is approximately 28 g/KN. Weight is the key factor for power/thrust you would need to take-off, so it is not unrealistic to make a simple estimate that CS100 would produce more emission than Q400.
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