Jump to content


CaptainSlug

Member Since 17 Feb 2006
Offline Last Active Today, 04:48 PM

Topics I've Started

On the topic of SCAR barrels

04 December 2017 - 08:32 AM

Posting this here to extend the discussion out to more participants. I've been coordinating with and discussing this topic with a wide variety of people all over the community and it's clear that there appears to be a consensus developing on this topic and I wanted to perform some practical tests to see if the "Muzzle Blast" camp has more validity to their theory than the "Rifling/Dart-Spin" camp.

 

I'm using roughly the same dimensions and spacing that Heath settled on through his extensive practical tests with his Caliburn SCAR barrel. I've also made some string-free muzzle devices to use as a comparison. These devices were design to vent muzzle blast without "imparting" and spin on the dart. If these produced a positive result I can argue that the important factor has nothing to do with spinning darts.

 

scCu0Or.jpg

The one on the right worked. The one on the left didn't.

 

The SCAR barrel and muzzle-devices make only a small difference with waffles beyond 70 feet. At least as far as I can tell. Those darts are already quite stable and it appears that as a result they aren't as impacted by muzzle blast. This confirms my own experience with using those versus accufakes at three different wars.

 

However, when firing ANY lighter darts or half-length darts it's making a very appreciable impact on the reliability of dart trajectory. The only outliers become darts that have bent foam, either from prior use or bad breech feeding. I can aim at a window on my house from over 70 feet away and hit it with 34 of 36 darts. Without any muzzle device I can only manage 18 of 36 from the same distance.

SjdakL8.jpg

 

The muzzle devices are working almost as well, but since you can't adjust them up or down, it's not possible to "tune" them for different darts. That's the only benefit the fishing line is really offering. When you change the "rifling" all you are really accomplishing is changing the elastic inner diameter of the scar barrel so that it fits those particular darts better.


2017 Modification/Homemade Contest

26 September 2017 - 02:15 PM

Voting is now open for the 2017 Modification/Homemade Contest. Polls will be closed at 11:59pm eastern time Friday October 6. Results will probably be posted by the following Sunday October 8.

Please go to each of the following threads and, review the writeup, and rate each blaster on the 4 listed criteria (Originality, Functionality/Aesthetics, Complexity, and Writeup Quality)

Homemades:
IPAC
.5-.625 ACBR

Modifications
Mag-Fed XBZ Longstrike
Rapid Red
Hammershot
Pump-Action Sentinel (VGS)

(Note: Voting open to Nerfhaven members only)

SuperNoVA - Herndon VA - September 16th 2017

29 April 2017 - 05:38 AM

September 16th 2017

9AM to 2PM

 

It was really fun, so let's just do it again on my Birthday. I kind of wanted to do one sooner, but July and August are usually just too damn hot.

 

Bruin Park

415 Van Buren St
Herndon VA 20170

 

50/50 NIC & Superstock

BYOD (Bring your own darts)

 

Game Types

+ BLOB

+ 3/15 Deathmatch

+ Gunslinger

 

Cheap lunch, drinks, and cake to be provided for those that RSVP

bruin_000.jpg

bruin_001.jpg

bruin_003.jpg


High Cap Magazine Collective Brain-Spew

27 April 2017 - 11:42 AM

I have no idea. But I suspect 22 darts is likely to be the ceiling of being reasonable in terms of mag dimensions and spring load.

Replacing broken/ripped O-Rings

06 April 2017 - 08:27 AM

I wrote this out to answer this question elsewhere and thought it might be good to store it here.

 

IF you break/rip/tear and O-Ring and you need to find a replacement for it, here's how you can do so.

 

1. Use a ruler to measure the length of the broken o-ring piece inside of the curve.

2. Use that length with this calculator set to "Given C"  http://www.calculato...lane/circle.php

3. Write that number down as you now have the actual ID of the O-Ring (or close to it).

4. Measure the thickness of the O-Ring as best you can. This number will be close to either a fractional size, or a millimeter size. It's best if you can use a caliper to get this number, but a ruler with both inches and millimeters will do. Always make sure to round DOWN to the nearest fraction or millimeter since o-rings are oversized. For example a "3/16" cord width O-Ring is going to have a NOMINAL width of .210".

5. Write that number down.

6. Take both numbers and poke through the McMaster catalog in the o-ring section. You can find the nearest ACTUAL SIZE for Inner Diameter from their list as well as the ACTUAL (or fractional) cord width.

https://www.mcmaster...-rings/=172uud9

 

Just pick BUNA-N as your material for now. The majority of the o-rings used for Nerf are that material.

 

dash.jpg

Now you have the DASH NUMBER of the o-ring you need. You can order the o-ring you need from McMaster, Amazon, Fastenal, or buy it from a hardware store. If you want to buy the o-ring from Home Depot you may need this chart to convert from DASH NUMBER sizes to the Danco brand o-ring part numbers.

http://captainslug.c..._reference.xlsx

 

Other brands may have different part numbers so check your nearest hardware store's online catalog before going to see what brand of o-rings they sell. If they don't list the products in DASH number sizes just e-mail the manufacturer and ask them for a similar conversion chart.