I've got a 5.3 Severne Blade that has a 435 luff. Reccomended mast is a 400. To me 35cm of extension is too much....I think it may explain a recent carbon extension failure towards the base. Considering mixing my 430 and 400 PowerEx skinnies for a better fit. Should I use 400 base and 430 top or vs verse? Thanks
I have exactly the same sail. I use a bottom Powerex RDM 400 and a top Powerex RDM 430 (only because I don't have a full 430) which gives you 415 thereby requiring only 20cm extention. Works a treat. A know a few guys that do exactly the same thing.
Having said that, 35cm of extension is not too much. Anything above that and I start to get a bit nervous.
Have fun.
Not sure why, but using the shorter bottom section works better than using the shorter top section.
430 bottom , 400 top will give a flexier top , stiffer bottom combo . The sail will set fuller down low with a tight lower leech and looser in the head , more like a race sail.
The opposite will mean the mast bends more down low flattening the sail down low . The upper leech will not twist as much so you will find yourself downhauling more to get upper leech twist . As the Blade has a lot of preshape down low this may be the better combo for you .
It is also going to depend on how the Powerex bend curve compares to the Severne RDM bend curve which is what the sail is designed around . I think they are quite similar, but there will be some difference . This will have a bearing on which combo works best .
The only way to find out is try !!!
Regards Martin
Hey SBJ1 I just checked my 5.3 and the recommended mast is 430. It is the 2008 model so I think you must be mistaken or have the 07 model. Anyway mixing a 430 with a 400 is fine.
G247,
I just looked on the wbe site myself...you're right...430 is recommended. That's interesting beacuse a very well known person that sails on Severnes reccommended 400.
Hi Folks,
Ezzy recommends short bottom, longer top. I use this to create a 400 for my 4.7m using a 370 bottom & 430 top. Seems to work well. For some reason Ezzy recommends a 400 for the 5.2, which has a luff length of 430. I just use the 430 for this sail, and it works well.
Cheers, jens
