Saturday, April 22, 2017

DeWalt 20V Max 6.0Ah Pack Teardown & Analysis

It's been a little while since I've had a shiny new tool battery to tear down!  This one showed up in the mail for some analysis and evaluation - so analyze and evaluate it I shall!

As of the time of posting, you can get 2 for $150 (shipped) on eBay - which almost certainly beats your local hardware store by a lot.  But, only if they're good.


This is a notable pack in that it's (supposedly) using 20700 format cells - the first non-18650 based tool pack I've had the opportunity to rip into.

What's inside?  Is it any good?  Read on to find out!

Saturday, April 15, 2017

Doing the Math: 2016 California Autonomous Vehicle Disengagement Reports

Self driving cars.  The imminent future of on-demand and super cheap transportation - or still a long development slog ahead, depending on who you listen to.  Earlier this year, California released the 2016 Autonomous Vehicle Disengagement Reports - which are reports of times that the human driver had to take over from the computers (either because the computers handed off control, or because the human wasn't comfortable with what the computer was doing).


When the reports came out, quite a few sites covered them - at the year granularity.  They just did some quick aggregation of the numbers for a whole year, perhaps made a graph, and (as is common in the media today) published a quick article about it.

I haven't seen anyone delving deeply into the data by using the month-by-month numbers - which are provided.  So, I did.  And some very interesting trends showed up for a few companies!

Interested in how everyone did in the month-by-month data?  Read on!

Saturday, April 8, 2017

Ural Gear Up: Oils Change

I've been talking about Urals for the past three weeks, and this week finishes my (current) Ural series with a post on a task that every Ural owner should be familiar with - oil changes.


The recommended oil change interval for the engine and gearbox (at least on the older model I own - 2005 and similar) is 2,500 km (1550 miles), with an oil filter change every 5000 km, and a final drive oil change every 10,000 km.

What an awful lot of people do instead is to just change everything (oils and filters) every 2500 km.  The bike doesn't make much power, but it runs an older and looser air cooled engine design hard - 40hp if you squint at the dyno sheet and a bike with the aerodynamics of a sheet of plywood make for a hard working engine!  The engine doesn't hold much oil either - only a hair over 2 quarts.

In any case, oil is cheap, metal pieces and labor are expensive.  It's cheap(ish) insurance, and regular oil changes are a good way to catch problems before they get bad - both from the oil and from the time spent around and under the bike, paying close attention to things.  Fine metallic powder/flakes in the oil?  Annoyingly, normal.  Metallic chunks?  Time to dig in deeper...

Plus, it's insanely easy to change the oil on this bike!  It could be a KTM...

Saturday, April 1, 2017

Assembling and Installing a Ural Sidecar Windshield

A Ural without a sidecar windshield is like... a Ural without a sidecar windshield!  Great for dogs, less-than-ideal for kids, and an awesome cargo hauler.  But, if you want something that's still great for dogs, becomes great for kids (or wives, siblings, etc), and is only slightly less awesome as a cargo hauler, you really, really want a windshield.


Unfortunately, if you order a Ural Sidecar Windshield (I got mine from Ural NE), what you get is a box of parts.  There are no instructions or anything useful like that, and internet advice on assembly is sparse, so you get two items in one - a windshield, and a puzzle!

If you find yourself in this situation, fear not!  I've done some puzzling for you, and have a guide for turning your box of parts into a shiny installed Ural windshield on your sidecar!