Junior Class

Quoting rules for carrier is like wrestling a slippery reel as they tend to change over time and be open to interpretation. Don't take anything you read for any of the classes as set in stone. What follows is as has been explained to me, the basic principal is, the whole flighty is based on time. That's it! Line length can be anything, but with a maximum of 60 foot. Short lines will give a faster fast run (good) but also a faster slow run (bad).  Long lines will give a slower  fast run (not so good) but a slower slow run (good). As can be seen one cancels out the other. However, as a general rule he slower the slow run, the higher your scores will be; because the scoring is biased towards the slow part of the flight. Long lines will always give higher scores. The rest is up to how well  you can pilot the thing.

If anyone knows better please correct me and supply some written rules.

For reference these are the original rules.

Junior Carrier Deck is an ideal entry level starting point compared to more advance models, being low cost and pretty tough little models that can be built and repaired after the inevitable mishap reasonably quickly.  Being small also make the easy to transport, unlike some of the more advanced models. 

Any fixed wing model of 17dm2 (264 sq.in.) wing area or less with a profile fuselage, simple flat-plate sheet wing. An engine of 2,5cc (0.15 cu.in.) maximum capacity, or an electric motor of 300W maximum power.

For for the subclass of Junior Carrier Dec,k line length can be can be anything that you happen to have most common will be 12-15m (40-50'). This freedom makes cutting down old or damaged lines more economical than purchasing new ones. If making new ones the length is up to you.

As far as as scoring goes the longer the lines the higher will be the overall score. Too long and the model may be difficult to control.

Junior Carrier Deck models are subject to all same genearl  Carrier Deck rules except the High Speed and Low Speed lap distances being TEN laps 

If you can manage to fly this sort of model on the 18.28m (60') lines  for the stipulated 7 laps go for it.