The Brasstard » non-gun weapons and tools

In Review: “Strelok” Ballistic Calculator App for Android OS

admin — Thu, 03 May 2012 04:50:10 +0000

Images Courtesy of Igor Borisov - "Strelok" Developer

The “Strelok” app by developer Igor Borisov is a free, high-quality ballistic calculator for Android OS that has many noteworthy attributes (the “donate” version is $9.99). This independent review post will take you through the top features and highlights of this excellent marksmanship tool.

Aside from being free, Strelok is an autonomous software package that once installed, does not require an internet connection to provide full functionality. This is nice if you are out in the middle of nowhere and need to use it. Furthermore, as of the date of this post, Strelok does not require invasive permissions, nor does it bombard you with piles of annoying ad’s like other “free” apps do. It only requires read/write permissions to the SD card to store your data. This app is also very resource friendly, meaning that you can use it for many hours in the field without excess drain on your battery from background processes.

Images Courtesy of Igor Borisov - "Strelok" Developer

Strelok is an easy to use and highly functional calculator that processes the relevant ballistic variables, and spits out useful data for making accurate shots. The user interface is simple and easy to navigate. You can build customized weapon profiles that are stored on the SD card for rapid retrieval, and there’s a whole boatload of reticle profiles built into the app (more are added with each update). Despite being a bit rudimentary from a design perspective, the interface is very user friendly and should be easy for non-techies to handle. You simply fill in the information for the variable fields, choose the appropriate reticle, and Strelok does the rest.

Images Courtesy of Igor Borisov - "Strelok" Developer

Some of the other key features include:

Temperature and barometric inputs
Slope angle inputs
Wind direction and speed inputs
Detailed cartridge data inputs
Customizable reticle variables
Graphic ballistic compensation output
Graphic angular data output
Table-based data output
Data output in metric, inches, MOA, MILs, clicks, etc…

Image Courtesy of Igor Borisov - "Strelok" Developer

Strelok is a great tool on the range and in the field. In the future, I expect to see even more reticle options as the developer rolls out subsequent updates. I would also urge them to add a database of ballistic coefficient (B.C.) values for major bullet makes & marks, as well a B.C. estimator/calculator. Currently, you have to get your B.C. values from an external source. Nonetheless, this is by far my favorite ballistic calculator for Android, and one of the friendliest “free” apps on the Google Play store.

Have fun and play safe!

The Brasstard

Next Generation Techlite Lumen Master

admin — Wed, 29 Feb 2012 06:27:23 +0000

It appears that the folks at Techlite take customer concerns into serious consideration. Not too long ago, Techlite released a Gen-2 Lumen Master 150-Lumen Tactical Flashlight, and more recently, a 200-Lumen version as well. Techlite addressed some major points of contention that arose from the troubled Gen-1 version. You can read more about those problems in the user comments on this page. In the following post, I will report on my test findings of three of the updated Gen-2 Lumen Master flashlights that I picked up at Costco.

First of all, let’s talk about the things that Techlite upgraded in Generation-2 to improve on the shortcomings of Generation-1.

They fixed the numerous problems caused by the overly-complex circuitry in the old tail switch. The simplified new switch is covered by opaque black rubber and does not have a low battery indicator. It also does not have a voltage threshold; in other words, it does not require a fresh battery level of voltage to operate. You can run the battery down until the light just dims out, rather than stopping abruptly when the voltage threshold has been reached.
The first change also fixed the failure to reset the switch circuit after the low-battery indicator came on. This had caused some lights to permanently stop working after the first set of batteries went dead… even after installing fresh batteries.
The first change also fixed the dormant battery drain issue regarding batteries being consumed when the light is stored with batteries installed. The new switch does not appear to allow any current to flow when the light is turned off. Read on for the burn time results of the Gen-2, 150.
They beefed up the battery retainer. The Gen-2 retainer sports a thicker, higher-quality and more robust plastic that is less prone to cracking when batteries are installed and removed.

Test Results

I tested a 3-pack of Lumen Master 150’s using the standard Duracell Coppertop batteries that were included in the package from Costco. Before testing, I installed the batteries and left the lights in a drawer for 6-weeks. After sitting for a month and a half with the batteries installed, I ran each light through one of the following tests.

[Light 1] High-Beam Burn Time: 129 minutes of total burn time, with notably diminished brightness after 108 minutes.
[Light 2] Low-Beam Burn Time: 236 minutes of total burn time, with notably diminished brightness after 189 minutes.
[Light 3] Abuse Test: For this portion of the test, I subjected one light to the worst form of abuse I could come up with… I gave it to my two-year-old. She has been banging it around for about 2-months now, and it is still alive and still running on the original batteries.

I was amazed at the long run times recorded, especially considering that my Gen-1 Lumen Master’s would not even turn on after 6-weeks of sitting. The 200-Lumen version has similar switch architecture, but will undoubtedly produce a shorter burn time than the 150. These lights produce a bright, well-defined primary beam for visual incapacitation, along with a wide-circumference secondary beam to illuminate your surroundings. Overall, the light beam quality is top-notch.

On a side-note of personal opinion, I would still like to see the activation switch further simplified by only having on/off/momentary. I also wish the 1-second delay of the momentary function was not there. For these reasons, I still find that this light leans more toward sport/utility use than tactical use. I prefer my tactical light to be as simple as possible, and of course, instantaneous.

Overall, these critical updates make the Techlite Lumen Master a real contender in the sport/utility light industry. At $20 for a 3-pack with batteries and lanyards, it certainly is an incredible value that should not be passed up.

In Review: Garmin eTrex GPS

admin — Sat, 28 Aug 2010 00:53:16 +0000

For hunters, fishermen and outdoorsmen, navigation to and from our recreation site has become much easier in recent years. As GPS units become cheaper, smaller and more accurate, we have run out of reasons to procrastinate the adoption of this technology into our outfit. The eTrex unit in this review came in a package deal with a Burris Fulfield II rifle scope. Though this exact model is not in production anymore, it is virtually identical to the newer eTrex H, which has a more sensitive receiver with the same basic features. Garmin’s eTrex line is a no-nonsense trail tracker unit designed for ease of use, long battery life and enough navigation features to get you home safely.

The eTrex controls are simple and the entire unit is waterproof rated at IPX7 (1m for 30 min). This means that a quick wade through a shallow river won’t shut it down.

The power button also turns on the display back-light if you are hiking in the dark.

When you first turn the unit on, it takes a few minutes to track your location. You will see the progress on the satellite tracking page above. Once you see “ready to navigate”, you are good to go. Ideally, you will have line-of-sight view with at least four GPS satellites. If not, you can get by on only three with a bit less accuracy.

The next page is the track log, which generates a small “map” of your journey. This unit does not actually contain any real maps that you would normally install via data port. However, it does give you a zoomable visual reference of where you have been so you can easily backtrack to your trail head. You can store 10 track logs, 20 routes, and 500 waypoints.

The compass screen provides an accurate heading and speedometer. Just remember, the unit does not have a real magnetic compass built in, so you have to be moving to get an accurate reading. Additionally, if the unit loses signal, runs out of batteries, or otherwise fails, your compass is gone too. No one ever said that a GPS unit is a replacement for a good old fashioned compass and map. Think of it more as a navigation enhancement accessory to add to your existing orienteering arsenal.

The trip data page allows you to customize the data that is displayed in the five fields. You can select things such as bearing, odometer, ETA, vertical speed, etc.

The menu page is easy to navigate and allows you to setup the eTrex GPS to your own specifications. This is also where the time/date and battery meter is located.

The Garmin eTrex 12-Channel GPS runs on two AA batteries. Garmin claims up to 22 hours of continuous-use battery life according to their website. In my experience, you can realistically expect about 15-17 hours with alkaline batteries depending on how much you use the back light. You can get slightly longer life out of lithium batteries. Nonetheless, this is plenty of juice for day trips, and with a hand full of spare batteries, you could leave it running for an entire weekend.

The eTrex has some cool features built in such as “hunt/fish” which gives you estimates for the best times to find game in that area. This is a somewhat rudimentary estimate as this data can vary greatly from one species to the next. It also gives you sunrise/set and moonrise/set and phase for a given waypoint. You can also use “project” to create a new or future waypoint from your current location.

The “go-to” feature allows you to select any marked waypoint to navigate towards. It gives you bearing and heading markers, speed, ETA, and distance remaining.

Conclusion:

The Garmin eTrex GPS is a decent little entry-level unit for basic outdoor navigation and venture tracking. It is easy to use, lightweight, and affordable. You can expect to pay between $80-100 for one of the eTrex H units online.

The only problem I have had with this unit is that it can be sensitive to how and where you hold it. For example, don’t expect it to work well if you toss it in your pants pocket and hike 12 miles into the back country before checking it. If you lose signal, the unit cannot track your course, so when you regain a decent signal, your tracks will have chunks missing. It seems to work best when you hold it in your palm, away from your body with the screen facing skyward. When I do this, I get perfect reception every time. I am assuming that the newer eTrex H will not have this issue as it is endowed with stronger reception due to improved receiver sensitivity.

I also noticed that the elevation of my waypoints can vary from day to day by as much as 40 ft even when I have at least four satellites to track. So, don’t expect pinpoint accuracy to the nearest inch. It will however, help you find your way back to the car/camp/boat after a long day of fun in the sun.

So, if you are looking for a compact, easy to use GPS unit to toss in your tackle box, take a good look at the Garmin eTrex or eTrex H GPS. If you are like me, you will be pleasantly surprised at just how useful these simple units can be in the field.

Have Fun Out There!

The Brasstard

Ka-Bar’s Khukuri “Kukri” Machete

admin — Thu, 24 Jun 2010 22:48:13 +0000

Ka-Bar is well known for making useful, durable and affordable blades. Their fighting knives are good enough for the US armed forces, and their Khukuri “Kukri” machete is no less a solid and serviceable product. If you are in the market for a great Khukuri but lack the funds for a top-end brand such a Himalayan Imports Khukuri, give the Ka-Bar a good look.

The Pros:

The Taiwanese-built 11.5″ blade is made from uniform 1085 carbon steel, and is cut with a 20-degree hollow grind making it a breeze to sharpen. At 1.7 lbs, it is heavy enough for serious chopping duty, and is very well-balanced. The blade is also coated with a non-reflective finish that is both durable, and does a good job at retaining lubricant. The Kraton-G handle has a good-sized tang, and is very durable and weather resistant.

The Cons:

The hollow grind is a point of contention for me. On one hand, it makes the knife easy to sharpen and can be made very sharp with relatively little effort. On the other hand, the lack of edge support makes the edge somewhat weak. In other words, with rough use it will not stay sharp for very long. I believe that for a working knife, it is best to have a convex grind, or at least a flat grind to provide better support for the blade while chopping hard materials. Also, the Kraton-G handle could use a rougher texture for better grip. It can get a bit slippery when you sweat. And of course, the cheap-o sheath (though it serves it’s purpose) leaves much to be desired.

Regardless of some of the weaknesses, it is hard to beat the Ka-Bar Khukuri “Kukri” machete at this price point. It is a great tool for general utility use. And if all else fails, it would make a formidable weapon. With a freshly sharpened blade, a solid strike with the “sweet spot” would easily sever a limb or deliver other devastating mortal trauma to a would-be attacker. In this respect, the Khukuri design is not a true machete. It is derived from ancient battlefield weapons that were built to kill. Therefore, it may not the best choice for clearing your way through a dense jungle. It is made for lopping off limbs… be it the limbs of a tree, or a man. And in that task, it works like a charm. Ka-Bar Knives

The Brasstard