if we don't
get 5 in the 18 meter class they can fly 15 meter with motors sealed or fly
open with motors available in fl

The 18 meter guys would, of course, have to saw off 3 meters in addition to
rendering their engines un-available for in-flight use, if they wished to
compete in 15 meter class.
The CD will have a saw available.
JJ Sinclair