What 7.0 Freeride on 460 Powerex RDM?

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copek
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What 7.0 Freeride on 460 Powerex RDM?

Post by copek » Mon Jun 01, 2020 3:45 pm

Hello ... I'm after a 2nd hand no-cam 7.0 ish blasting sail to revive my 1994 Sputnik 280 for the summer! I have an old (00's) 460 Powerex RDM which isn't ideal but would save a bunch of cash If I could find a sail to work on it.

Was thinking Severne NCX but from the Unifibre mast curve chart I'm not sure the bend would work. Ezzy is an obvious choice but I've had a lot of Ezzys and am after a change.

Anyone using that mast in something similar or any thoughts?

Loftsails Oxygen looks tempting ... ;)

PhilN
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Re: What 7.0 Freeride on 460 Powerex RDM?

Post by PhilN » Mon Jun 01, 2020 5:09 pm

Like Ezzy, Loft use RDM masts for freeride, both have 490 RDM. SDMs in 460 and greater might give slightly better performance for race/freerace but I prefer the durability of RDMs.

I was thinking of replacing my larger Ezzy sails with Loft, as the Loft sails might have a bit more top end speed. But then again, the Ezzys are so easy to use.
The Oxygen looks a nice sail and gets good reviews, but the 7m needs a 430 + 36cm extension. The 7.3m uses a 460 mast.

James.blonde
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Re: What 7.0 Freeride on 460 Powerex RDM?

Post by James.blonde » Mon Jun 01, 2020 9:32 pm

I was told on good authority that if the powerx has the stars and stripes made in America flag on it they were particularly well suited to Naish sails which were more stiff top. If this is the case then older models of Severne and gaastra would work well on it.

copek
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Re: What 7.0 Freeride on 460 Powerex RDM?

Post by copek » Mon Jun 01, 2020 9:51 pm

Thanks both.

@Phil - I have a 400 Ezzy too so could make a 430 to suit the Loft I guess. Yeah it looks nice right? Hmmm.

@James - Will dig out the mast and have a look. I don't recall a flag on there but it's been a while. Good tip, cheers!

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BTB
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Re: What 7.0 Freeride on 460 Powerex RDM?

Post by BTB » Mon Jun 01, 2020 11:59 pm

Agree you need to work out what kind of bend curve you are dealing with. That over anything else. North / Ezzy /Simmer all good for mid to soft top. Gaastra / Severne / Naish (older ones) for hard top.

I would not be that bothered with something built specifically for RDM. If something is built for SDM then it never seems to hold it back with an RDM.

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BTB
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Re: What 7.0 Freeride on 460 Powerex RDM?

Post by BTB » Tue Jun 02, 2020 12:03 am

PhilN wrote:
Mon Jun 01, 2020 5:09 pm

The Oxygen looks a nice sail and gets good reviews, but the 7m needs a 430 + 36cm extension. The 7.3m uses a 460 mast.
I'd avoid any sail like that. Why should the best option be to have loads of extension. I'm not adverse to that much extension but only on the basis you don't have a more suitable mast. Recommending that combo to me smacks of bad design - they are not doing something right.

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Re: What 7.0 Freeride on 460 Powerex RDM?

Post by PhilN » Tue Jun 02, 2020 6:05 am

BTB wrote:
Tue Jun 02, 2020 12:03 am
PhilN wrote:
Mon Jun 01, 2020 5:09 pm

The Oxygen looks a nice sail and gets good reviews, but the 7m needs a 430 + 36cm extension. The 7.3m uses a 460 mast.
I'd avoid any sail like that. Why should the best option be to have loads of extension. I'm not adverse to that much extension but only on the basis you don't have a more suitable mast. Recommending that combo to me smacks of bad design - they are not doing something right.
I agree, if i replaced my Ezzy Lions with Switchblades Id need 34 & 32cm extension settings, which I'm less keen on. My extensions go up to 38cm. They would 'fit', but not sure if I'd be happy.

I think they do it like that as they prefer using a softer mast.
If you compare the top of an Ezzy Lion/Cheetah against a Loft Switchblade/Oxygen, the Ezzy top batten is right at the top, whereas the Oxygen there is a fair bit of luff above the top batten. Does that bit extra (or less) of luff above the batten make much difference, I dont know.

No cam sails (its the same as their cammed):
https://www.loftsails.com/windsurf-gear/sails/oxygen
https://www.ezzy.com/cheetah-20/

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Re: What 7.0 Freeride on 460 Powerex RDM?

Post by PhilN » Tue Jun 02, 2020 7:37 am

James.blonde wrote:
Mon Jun 01, 2020 9:32 pm
I was told on good authority that if the powerx has the stars and stripes made in America flag on it they were particularly well suited to Naish sails which were more stiff top. If this is the case then older models of Severne and gaastra would work well on it.
I wouldn't trust the American flag being on the mast as being made in America or of a certain vintage. I cant recall when Powerex were bought by the Asian company, but this mast was definitely not a USA built one. I bought one in 2016, I believe it was made a few years earlier.
bottom and label.jpg

Not all older Naish sails are suited to hard top masts. In 2007 their freeride 430 was more CC, IMCS bend characteristic 14 if we remember what that was all about. My 2007/08 Naish Redlines 5.6 - 9.0m set ok on Simmer SC8 masts.

http://www.peterman.dk/masts-all-imcs01.htm

Jeroensurf
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Re: What 7.0 Freeride on 460 Powerex RDM?

Post by Jeroensurf » Tue Jun 02, 2020 7:59 pm

The one with the yellow paint are the original made in the US Powerex. They are allmost indestructible (broke only 2 of them :oops: ).
They where all made at the same curve but cut in different length,s. The 460 is trather soft, the 370 rather stiff. 400+430 seem to work really well.
I was told the newer ones have a slightly different curve, more differentiation on length but no clue of the numbers.

James.blonde
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Re: What 7.0 Freeride on 460 Powerex RDM?

Post by James.blonde » Tue Jun 02, 2020 8:54 pm

I guess the "made in china " written on the bag gives the game away!
I bought mine from 247boardsports, the owner there said he was involved in the design process somehow, cant remember the exact story.

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