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Nerf Turf 10kg Vs OMW 7kg+ Test

 
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Nerf Turf 10kg Vs OMW 7kg+ Test
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OldNoob
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Post Nerf Turf 10kg Vs OMW 7kg+ Test  Reply with quote
Thanks to Old Man Nerf for the loan of a 10kg Nerf Turf spring we have results!
Full spreadsheet here.
Notes:
Retaliator spec- Orange Mod Works S3 sealed breech, NO STUPID BARREL part, S2 Bolt, S2 plunger. Gavinfuzzy pump kit, full length fluted faux barrel inside Retal barrel extension.
With a better dart fit this will shoot harder, the S2 bolt is awful. This was the retal I had at BB4.
All shot on NEW ELITE DARTS.

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Big_Poppa_Nerf wrote:

Boff whats the damage? I have spent over 3 times my Nerf budget this month already. Part of me is trying to be a responsible parent/husband/house owner. The other half is just says 'Ahhhh, Screw it!'.
Fri Dec 02, 2016 2:16 pm View user's profile Send private message Send e-mail
old_man_nerf
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Post Reply with quote
In that case i definitely want it back Smile

Will PM you my address...

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Fri Dec 02, 2016 4:16 pm View user's profile Send private message Visit poster's website
Northwind
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Post Reply with quote
<borderline necro? But thought it belonged...>

Just tested mine and got pretty different results, in a completely stock retal- I got an average of 92.69 from a 5kg OMW spring and 92.24 fps from the Nerf Turf.

TBH it feels similiar in the hand and to prime, I might measure the spring out of interest, I don't think it's much stiffer than the 5kg.

(don't do direct number comparisons with this data, I use fvjs for my personal testing, just because I have a load of them to use up and I don't want to use up elites or koosh.)
Fri Jan 06, 2017 12:52 pm View user's profile Send private message
OldNoob
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Post Reply with quote
FVJ are much heavier so will be costing FPS vs a 1g elite. A lot of spring energy is wasted without a fully sealed breech, I suspect that's what's happening here.

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Big_Poppa_Nerf wrote:

Boff whats the damage? I have spent over 3 times my Nerf budget this month already. Part of me is trying to be a responsible parent/husband/house owner. The other half is just says 'Ahhhh, Screw it!'.
Fri Jan 06, 2017 2:48 pm View user's profile Send private message Send e-mail
Northwind
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Post Reply with quote
Oh yeah, like I say the numbers aren't at all comparable between the 2 datasets. But the trend should be. I'll add the omw 7kg spring when I get a chance, that'll give a better picture.

Have to say I just don't think mine is a very stiff spring, just based on observation. Which if true would ask some pretty interesting questions. So I'll look at that too. (I keep meaning to put some more thought into actual spring measurement, it interests me, but for now I can do a simple comparison)
Fri Jan 06, 2017 3:56 pm View user's profile Send private message
OldNoob
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Post Reply with quote
If you want accurate spring measurements BSUK's spring supplier can give you a full data sheet if you send the spring, the true force measurement in in N/MM.

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Big_Poppa_Nerf wrote:

Boff whats the damage? I have spent over 3 times my Nerf budget this month already. Part of me is trying to be a responsible parent/husband/house owner. The other half is just says 'Ahhhh, Screw it!'.


Last edited by OldNoob on Sat Jan 07, 2017 12:55 am; edited 1 time in total
Fri Jan 06, 2017 4:38 pm View user's profile Send private message Send e-mail
Northwind
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Post Reply with quote
Simple enough to diy tbh, I just need to put a little effort into that but I keep getting distracted by OOH SQUIRREL

OK, still no spring measurements but I found my spare OMW 7kg and there's no question, the Nerf Turf "10kg" spring is less stiff- that's with the scientific "OMG priming a standard retaliator is way harder with the OMW spring" test. Also reflected in the FPS, the 7kg averaged 101.36.

Pretty interesting- if this was the only test we had I'd say that Nerf Turf are just total bullshitters. But since your test got such different results, it's more interesting. I guess what we have here is wild variations in the product. (I think we can rule out the breech making the difference, I can't see any reason why your breech would favour a weaker spring?)

I'll sort out the spring measurement, I think it's necessary- not a proper "true kg" measurement but just a comparative, that's dead simple and doesn't need any precision in the test. (it'll be a 1kg gym weight, a bit of threaded bar, and a bit of wood with a hole in- science!) I need to formalise something to stabilise the springs better before I can get repeatable results but this is enough to say stiffer/weaker.
Mon Jan 09, 2017 12:00 am View user's profile Send private message
OldNoob
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Post Reply with quote
Regarding the breech- a weaker spring could get better results if it had a better relationship to the barrel length. There's an ideal ratio of plunger volume/air compression : Barrel length that isn't properly calculated mathematically yet but getting it right can make quite a bit of difference. That is only possible with a more sealed breech as it allows the gas charge to continue expanding to the end of the barrel.
Lots of stuff about that in Btrettels Nerf blog.

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Big_Poppa_Nerf wrote:

Boff whats the damage? I have spent over 3 times my Nerf budget this month already. Part of me is trying to be a responsible parent/husband/house owner. The other half is just says 'Ahhhh, Screw it!'.
Mon Jan 09, 2017 8:27 am View user's profile Send private message Send e-mail
Northwind
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Post Reply with quote
As interesting as that is, it's not the situation we have here.

Once I get some better measurements I'll see what Nerf Turf have to say; their ad is very vague but I doubt the spring I have is meeting their claims. (mind you I doubt many springs do, it seems to be like motorbike weights). It's always possible I have a random duffer. Or, maybe they've just sent the wrong spring!

Was there anything interesting visually about the 10kg? Noticably different coils or thickness or anything?
Mon Jan 09, 2017 2:29 pm View user's profile Send private message
OldNoob
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Post Reply with quote
I should have photographed all the springs together. Was just in a hurry to get the test done before it rained again!

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Big_Poppa_Nerf wrote:

Boff whats the damage? I have spent over 3 times my Nerf budget this month already. Part of me is trying to be a responsible parent/husband/house owner. The other half is just says 'Ahhhh, Screw it!'.
Mon Jan 09, 2017 2:34 pm View user's profile Send private message Send e-mail
old_man_nerf
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Post Reply with quote
It's longer than the OMW 7kg and as has been noted doesn't catch unless some shell work is done which suggests thicker coils.

If I get chance I'll take a picture of the various springs I have (stock/5kg/7kg/alleged 10kg)
Mon Jan 09, 2017 2:36 pm View user's profile Send private message Visit poster's website
Northwind
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Post Reply with quote
Hmmmm. Mine is slightly longer than a 5kg OMW, a few mm, but pretty much the same length as my box-fresh 7kg (didn't measure, just eyeballed, could be a mm or two in it)

I just noticed he also sells a 6kg spring- my money now's on me just having the wrong spring  Laughing So I've dropped him a line, let's see what happens. It was in a 10kg bag but I'm kind of envisioning a "warehouse" much like my garage with piles of crap absolutely everywhere.
Mon Jan 09, 2017 3:08 pm View user's profile Send private message
NewportNerfer113
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Post Reply with quote
You definitely have the wrong spring. I also have both and the 10kg spring was a good 2 cm or more longer.

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Mon Jan 09, 2017 4:42 pm View user's profile Send private message Send e-mail
Northwind
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Post Reply with quote
...and confirmed, he's sending me a replacement.

(I looked at the label, the spring weight is handwritten on so I'd bet 10 australian korunas or whatever heathen faux-money it is that they use, that it's just a mis-pick. The dude was great to deal with so big plus for that)


Wed Jan 11, 2017 4:28 pm View user's profile Send private message
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