BRIT NERF Forum Index
Join! (free) SearchFAQMemberlistUsergroupsLog in
Elite Alpha Trooper Modification Test

 
Reply to topic    BRIT NERF Forum Index » Modifications -> Chrono Data Forum View previous topic
View next topic
Elite Alpha Trooper Modification Test
Author Message
OldNoob
Foam Data Collector


Joined: 07 May 2013
Posts: 4826
Fav. Blaster: Xtreme 180 Rapidstrike
Location: In the Boonies



Post Elite Alpha Trooper Modification Test  Reply with quote
All these are AR in. I tested the Oznerfnerd kit, video on my youtube.
Summary-
Catch is really nice, no flex so far and was a perfect fit, good uprated catch spring included.
Spring guide is a good idea to relieve load on the back plate where the stock mount is.
Spring- a bit disappointing, some of that is down to the usual EAT barrel drag and variable dart fit. see for yourself how it stacked up with the OMW 5kg and stock figures.
Stock extender- very nice, good print quality and superb fit. Recommended if you want to run Retal or other short stocks. Nice design as it follows the contours of the shell.

I will have further testing with Koosh and Voberry darts. Those results will go up here first. I will also be trying a big bore faux barrel swap and an AR delete to see what happens to the performance. I have a spare AR removed bolt.

Oznernerd is on here, PM him if you want anything. He sells through E-Bay as Modnerd, with reasonable prices for the quality of the gear. Look out for the Slingfire kit next!

_________________
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!'.
Wed Feb 25, 2015 7:16 pm View user's profile Send private message Send e-mail
Northwind
Nerf Addict


Joined: 28 Dec 2014
Posts: 899
Fav. Blaster: Rapid Red
Location: Edinburgh



Post Reply with quote
Curious to hear results of the big bore- it seems like a pretty obvious idea but I've not seen many people talk about it as a concept.

Maybe this info's already out there but were you able to do a spring strength comparison?


Last edited by Northwind on Wed Feb 25, 2015 8:48 pm; edited 1 time in total
Wed Feb 25, 2015 8:23 pm View user's profile Send private message
SSGT
Nerf Addict


Joined: 12 Jan 2013
Posts: 1266
Fav. Blaster: 'Rave-N' CS-18, Elite Alpha Trooper (EAT) CS-12
Location: Durham



Post Reply with quote
Very interesting. Probably comes down to OMW's underestimation of their spring rates, although that said it got around 93fps average (over 24 shots) over his own chrono with AR intact. Was this the same EAT used for the OMW spring test?

_________________
Trust me, I'm an engineer! Very Happy

Antonius wrote:
Compoooter bits make shiny Nerf blaster go whoosh!
Wed Feb 25, 2015 8:36 pm View user's profile Send private message
OldNoob
Foam Data Collector


Joined: 07 May 2013
Posts: 4826
Fav. Blaster: Xtreme 180 Rapidstrike
Location: In the Boonies



Post Reply with quote
No it wasn't the same one. I tried two different EAT's with two different Oznerf spring kits with the same results, within 1 FPS average, the printed results are the second set gathered as I thought the first set was due to a problem with the EAT. Note that the chrono in Neil's video is an F1 inside, a combination I believe is more prone to over reading. If you compare almost every set of data gathered on that combination, it is higher than comparable sets on mine outside and Toruks.
Not got the equipment to test the springs weight.
The big bore faux barrel is something I got from BFU from Nerfcast, he does it on rampages. He uses centurion barrels!

_________________
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!'.
Wed Feb 25, 2015 8:56 pm View user's profile Send private message Send e-mail
Northwind
Nerf Addict


Joined: 28 Dec 2014
Posts: 899
Fav. Blaster: Rapid Red
Location: Edinburgh



Post Reply with quote
It's not numbersy-science but you could do a comparison-only test with just a weight and a string. Not massively useful but with the numbers so similiar and the claimed spring weights so different it makes me curious

I'll check that out bfu, thanks! I was just planning on using whatever random pipe I can find that fits inside the shell but then I got paralysed with indecision Laughing
Wed Feb 25, 2015 9:11 pm View user's profile Send private message
OldNoob
Foam Data Collector


Joined: 07 May 2013
Posts: 4826
Fav. Blaster: Xtreme 180 Rapidstrike
Location: In the Boonies



Post Reply with quote
I can't test everything. It's been enough of a struggle to get this far. So far I have spent well over 1000 to just provide the current data we have. Go get some, make that your thing, put it up here.

_________________
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!'.
Wed Feb 25, 2015 9:18 pm View user's profile Send private message Send e-mail
Northwind
Nerf Addict


Joined: 28 Dec 2014
Posts: 899
Fav. Blaster: Rapid Red
Location: Edinburgh



Post Reply with quote
Sorry if that seemed like i was demanding you do it! Was not meant that way at all but I can see it read a little bit needy. Just thought it'd be up your street
Wed Feb 25, 2015 11:24 pm View user's profile Send private message
SSGT
Nerf Addict


Joined: 12 Jan 2013
Posts: 1266
Fav. Blaster: 'Rave-N' CS-18, Elite Alpha Trooper (EAT) CS-12
Location: Durham



Post Reply with quote
I got my EAT kit this week and I must say, I've had a few issues with my catch. I found it a bit harder to fully prime the last couple of mm and I had a few issues with the catch slipping if I pulled the pump back quickly whilst it was already primed (it sort of bumped the catch off the plunger rod which didn't happen with the stock catch). It would only do it if I was pulling the pump back though, I couldn't make it release just by knocking the blaster around. One thing I did notice after taking it apart again was that some of the 3D printed plastic had come away from the curved part of the catch which catches the plunger rod.



It's like there's a small border around the inside of each printed layer which separates easier from the rest of the catch (I found I could prise away the rest of it with my thumbnail).



This was something I did worry about with 3D printed catches, layered plastic is never going to be as resistant to shear as an injection moulded piece. I'm not sure it's a design flaw per se, more a limitation of 3D printing technology as it stands (in the vertical direction this catch is much stronger than the stock one). It wasn't the end of the world by any means (and if you keep your forward bolt lock you'd never have a problem) but, at least for me, it's a dealbreaker. I switched back to the stock catch which is holding up fine. I've switched back to the stock catch which primes buttery smooth with the oznerfnerd catch spring and plunger rod guide and doesn't bump-release. I have no qualms at all with the rest of the kit though. Both springs are excellent (if the main spring had an ID that was a smidgen smaller it would be too tight but that could well be down to either fine precision on oznerfnerd's part or just the usual Hasbro tolerances) and the plunger rod alignment plate does it's job fantastically (and, unlike the OMW version which is just carried over from the old AT, is actually suited to a DP blaster).

My EAT doesn't have an AR but I don't think that would be the cause of the catch issues. It does get improved performance over the OMW spring without an AR though (data here). Not by a huge amount (6fps) but enough to be noticeable... and louder.

_________________
Trust me, I'm an engineer! Very Happy

Antonius wrote:
Compoooter bits make shiny Nerf blaster go whoosh!
Wed Mar 04, 2015 11:24 pm View user's profile Send private message
OldNoob
Foam Data Collector


Joined: 07 May 2013
Posts: 4826
Fav. Blaster: Xtreme 180 Rapidstrike
Location: In the Boonies



Post Reply with quote
That's a great set of data- talk to Oznerfnerd about that catch, he is pretty fast at sorting things.
I will re-open mine and see if it's still good. I liked his metal and abs laminated one, it was in his sealed breech EAT.
Good info, as usual. You should start a blog.

_________________
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!'.
Wed Mar 04, 2015 11:33 pm View user's profile Send private message Send e-mail
SSGT
Nerf Addict


Joined: 12 Jan 2013
Posts: 1266
Fav. Blaster: 'Rave-N' CS-18, Elite Alpha Trooper (EAT) CS-12
Location: Durham



Post Reply with quote
OldNoob wrote:
I liked his metal and abs laminated one, it was in his sealed breech EAT.

I thought I remembered seeing one of those around somewhere. Didn't he do a pair of 3D printed inserts at one point too? To be fair that is the main issue with the stock catch, it inherited huge cutouts from the old AT one. It's just really weird it only let go when I pulled the pump back. No matter how I did it I couldn't get it to let go just by knocking it around.

My main problem at the minute is finding time to do stuff. I've got so many unfinished projects. It is a lot easier to do chrono tests now I've got a USB cable though. If anyone has a chrony I'd definitely recommend making a USB cable for it. Makes it a lot quicker if you can gather and dump the data straight into a spreadsheet instead of writing down each shot manually.

**UPDATE**

Credit to oznerfnerd, the issue was sorted and the new parts were sent out promptly. I've given one of the new catch plates a good bit of testing and it seems to be holding up well. I haven't been able to make it bump-release and the layers do seem to be bonded better. Looks like it was just a material flaw with that particular batch.

_________________
Trust me, I'm an engineer! Very Happy

Antonius wrote:
Compoooter bits make shiny Nerf blaster go whoosh!


Last edited by SSGT on Thu Mar 26, 2015 9:58 pm; edited 1 time in total
Wed Mar 04, 2015 11:56 pm View user's profile Send private message
oznerfnerd
Regular Member


Joined: 31 Jan 2012
Posts: 136
Fav. Blaster: Stampede, Longshot, Alpha Trooper
Location: NSW, Australia



Post Reply with quote
Hi SSGT,

Sorry to see that with the latch mate, I know what it is.

I got given a roll of what was meant to be the ducks nuts of filaments by a rep.

While it did print very strongly it didn't adhere as well between layers as straight ABS.

Only about 6 went out before I went back to my premium filament.

Just send me a message through ebay and I'll sort you a couple of new sets.

We held off on the ally laminated plate because we were having no problem with abs and because it made the release less consistent.

We know the rules...it's got to fit and work.

Cheers,

**UPDATE**

SSGT, replacement parts are in the mail now.



_________________
http://www.youtube.com/user/oznerfnerd?feature=mhee

http://stores.ebay.com.au/oznerfnerd?_rdc=1
Thu Mar 05, 2015 12:53 am View user's profile Send private message
Display posts from previous:    
Reply to topic    BRIT NERF Forum Index » Modifications -> Chrono Data Forum All times are GMT
Page 1 of 1

 
Jump to: 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Card File  Gallery  Forum Archive
Powered by phpBB © 2001, 2005 phpBB Group
Design by Freestyle XL / Flowers Online.
Create your own free forum | Buy a domain to use with your forum