Hi Theo
The development of design ideas and concepts will be one of the fun aspects of this F-14 class as currently proposed ,
though believe its a matter of time before a min. boat weight and more complete box rule will be needed as sub category F-14 class.
same size here , 6,4 --225 {plus a little} -{to much good food lately } --the effects of boat weight and crew weight being interesting and fun to speculate on in this 14.3 length size open rule Formula class .
Lighter is faster ,--no question ,--to the point of being completely overpowered by the forces on the sail or sails after depowering all sail controls and tuning techniques to depower ,--for most design that is in the upper range approaching 16 to 20 mph winds and up ,--.-The only conditions where added crew weight are a plus rather than minus . The heavier crew is at a disadvantage except when extended out on the wire using every bit of that crew weight , and the boat design allows you to push the boat harder without pitchpoling over the bows, thus proper volume calc and design for a given L optimized for a given crew and boat weight with sail area forces,-
The only type cat design where lighter crew weight has not been a significant advantage has been the larger L classes where the relative size and weight is less of a total percentage of the total design formula .--The I-20 in N A added 15 sq ft of main in a larger sq top ,-over the iF formula rule --This other factor of added sail area and limited beam at 8,6 on 20s make crew weight more of a non factor sooner , though lighter crews still have advatages in lighter conditions , under 6 mph up and about 10 down .
No question ,- An existing Taipan 14 or home built fold up ply cat design weighing 150 Lbs will have much better speed potential than a production cat weighing 250 . {100 lbs more}
It would be much the same as racing an A Class cat at 160 Lbs -http://morrellimelvin.com/a2/specifications.htm
vs a N 5-5 uni at 340 Lb s --{80 Lbs heavier}
http://old.cruisingworld.com/ssbk/nacra55u.htm-and reducing its sail area from 172 to 150 ,--
IT WOULD BE NO CONTEST -given equal skippers ability on them .
Why would any doubt or challenge this, some expect to get out and beat lightweight HT types on the race course on their heavier production 240Lb boat ,--It is a matter of getting a lighter boat and equal sailor on it to just sail away around a course on the lighter boats speed potential ,per proven design formula and examples.
It is a matter of when this occurs not if --
and a 2nd production class category needed ,-with more defined box rules and min boat weight .
In the 14 L the lighter boat will need a little more beam
8 to 8,6 to achieve similar stability and enough volume in hulls ,-and near the bows ,to carry a spin downwind . This could be accomplished by larger bow sections -wider or deeper in combination ,or also -by moving the CE of the sail plan further aft ,-by mast rake ,-or moving the mast location in combination , also designing in proper helm balance with CLR and CE .
a REAL interesting design challenge in 14.3 ft Length .
NOW

Place a 230 Lb crew in the design mix .
It is very difficult for a 225 or more Lb crew to sail any 14 L boat against a 100Lb + or- lighter crew , again the relative size and percentage of total weight in design formula is much greater in this 14 L . Place both skippers on light weight boats 150 Lbs-and the lighter crew will have a huge advantage in this 14 L,- given both on the same design hulls and sail plan .
How to use crew weight to any advantage in a 14 ft Length ?
The only aspect of the rule that may help a heavier crew is the 300 sq ft sail plan {any sail plan configuration }
This would include a genoa type headsail that could be carried upwind and down by a heavier crew .
Double the sail area upwind over production type spin rigged 14s , and not having to set or takedown at marks .
A genoa -hooter type,--the ideal being set on a furler and being able to partially reef it if overpowered .
just as per big boats .
A number of other design solutions are also possible ,some listed in the rules thread.
Coresponding design problems are now --enough volume in hull design to carry the added crew weight and forward sail forces towards the bows in a 14 L ---and enough beam to corespond to added sail area .
In moving and raking the sail plan aft ,helm balance becomes more a concern though offset by a genoa .
A larger crew weight on 14 may consider this hooter furler sail plan on more substantial mast section allowing a taller 7/8 type rigging or masthead rig with hi aspect genoa .
If this will compete with the lightweight HT types in this L is an unknown , my guess is it will , more in waves and any reaching leg .
It is going to be lots of fun finding out ,
Looking forward to seeing some fun 14s ,
and trying one myself .-
off subject ,-or expanded subject -
There was great interest in the 18 sq Class
or potential of reviving it also as a more open development class , this potential after 14s get established for future years and sailors wanting to develop larger versions of experimental sailing craft in an open rules context.