It is marked constant curve.

Googling seems to suggest it is actually constant curve, before NP started talking "relatively constant curve" to actually mean "flex tip" cos in gtheir mind the tip should flex more and all that debate.

So - this is about a 1999 - 2000 ish mast. Forgetting that it is not high performance, will normal no cam freeride sails say 2000 - 2010 age from most manufacturers work on it as it is actually CC?
Or is it not....?
In which case - if it is not, and it is actually a bit tip flex maybe newer NP will work OK on it?

This is what I think I know about these masts ( think )
what size is it ?
The longer lengths are constant , the shorter they go the flexier top they are.
460 and up work great with constant sails , smaller I don't know.
If they haven't fried in the sun or stored in a hot roof truss they are a strong mast.

I believe that the specifications of this mast are as follows:






source:mytrims.com/masts/data.asp?ID=239

An easy way will be to measure the weight against this and it is likely it is around 1998 in my opinion.

I believe these masts were manufactured by Fiberspar in the USA for Neil Pryde.

The 430 Freeride mast which replaced this with "light tip technology" was introduced by Neil Pryde in 1999 which was based on the C30 (1998) with the following specifications.See last mast entry on the LTT Freeride mast which replaced your mast.






I hope this helps. I have a NP World Cup MKIV 5.5 1993 (brand new never used) which may work with some tuning on your NP C30. Its for sale on seabreeze.

I had a C30 460 of similar vintage and looked the same as the one which Mark has (just longer) and it worked fine infact really well on a 2013 KA Koncept 7.5 m2. I think the masts of C30 were made between 93-98 at the same time as the CK series NP masts. As they were made by Fiberspar they are excellent durable masts.

thanks aribenasher, all that was printed on the mast but I doubted CC.

If they were made by Fiberspar, this will be the same as a Reflex3200 I reckon. Ie: real constant curve.

Mark if it helps in an act of desperation when I had a problem with my 490 mast I used an even older then your CK30, NP 25% wave mast (1 piece 460) with an 8.5 Maui twin cam on a massive mast extention and it worked great. Tune by eye not the numbers. I was totally surprised how well it worked. A bit soft pumping but certainly powerful and totally stable enough.

untill the size reaches 520 , NP are constant curve flex , or flex top.
the numbers for a 460 range from 14.8--16, or about 77/61


Due to this masts age it is probably flexer even.

fiberspar not in USA , nor do I think anywhere, never heard they made NP , or masts for anyone.

Thanks guys, as suspected they are "normal"compared to the modern ones

:)

I use to have that mast .brought it from Reg about 15 years ago when he had that shop on the canning hwy.mine was a 460 used to rig it on the old arrow race sails .they were a tough mast in there day.

sorry i forgot 2 sails,6.5 lion,also worked well in that, but did not work well in a ka 6.0 stealth,cambers would not rotate,mast new about 98.the reason so many sail, was we only ever used 460 size mast and most sails had turban tops,if we needed longer mast we stuck a piece of alloy on the top[gastra boom adjusters fitted well on the niel pryde] if shorter a hacksaw.