"Richard Riley" wrote in message
...

The dash 8-200 isn't that large an airplane. If the sport jet can't
handle it's wake 2 minutes after takeoff, how is it going to share
airspace with a 777 five minutes ahead?


FAAO 7110.65 defines large aircraft as those of more than 41,000 pounds
maximum certificated takeoff weight up to 255,000 pounds. Appendix A of
that order puts the DHC-8/200 in the large weight class. The type
certificate data sheet for the DHC-8 series issued by the UK CAA gives the
maximum take-off weight of the DHC-8 -200 series as 36,300 pounds.


http://www.caa.co.uk/docs/1419/srg_acp_fa36-06.pdf

http://www.faa.gov/airports_airtraff.../media/ATC.pdf