Latest Comic : Tuesday, May 17. 2022

<< First  < Previous

Bolt EV's economic relevance at 100,000km

Bolt EV's monthly performance (distance, efficiency, and battery) up to 100,734.6km

On March 27, 2022, after nearly 46 months of driving, my Bolt EV's odometer hit 100,000km. Considering that it isn't used for commuting most of the time, this is a relatively quick achievement. Of the 100,734.6km driven in 46 full months, 48,588.7km was done in the city while the remaining 52,145.9km was on the expressways, so at 48:52 ratio it's got a balanced use. As for the efficiency, the car spent 13,016.1kWh, so that translates to 7.74km/kWh overall. It's well over the official numbers, so that shows how conservative I drive.

Bolt EV Total Cost of Ownership (TCO)

During this time, I spent KRW 5,461,940 (about US$4,440) on the car, excluding toll. Interestingly, the insurance and the tax accounted for more than half of the total. This reflects how relatively little I need to pay for the charging and maintenance. In fact, I spent just KRW 874,467 (US$710) for charging, which is less than 1/6 of the total. And other than the tires, the periodic maintenance costs were insignificant.

There's a good reason why I spent so little on charging.
Continue reading "Bolt EV's economic relevance at 100,000km"

Appearance on YTN Science "Docu S Prime"

Screenshot from Docu S Prime episode 243 "Science Ahead of Time - โ€˜Over-Technologyโ€™"

I was interviewed about the wearable computer and the tablet PC that I developed about two decades ago by the crew of YTN Science last month. The result of that made into the most recent episode of the science documentary series "Docu S Prime" which aired yesterday, March 10, 2022. It was quite flattering to see those devices being introduced as "over-technologies" together with the self driving car from 1990s.

Watch Episode
- Official Website
- YouTube
Defined tags for this entry: , , ,

Tiangong Space Station seen in day and night

Tiangong Space Station in front of the Moon on February 8, 2022 (Click for full size)

Tiangong is a Chinese space station which was initially launched on April 29, 2021. It is built upon the experience gained from its preceding prototypes, Tiangong-1 and Tiangong-2. It only has the core module (Tianhe) at the moment, but two additional modules (Wentian and Mengtian) are planned to be added this year. Because Tianhe is much smaller and simpler than the ISS, I wasn't sure what to expect when photographing it. Once I did catch it crossing in front of the Moon, I noticed that it looked longer and resembled a candy in a wrapper. That was due to the cargo spacecrafts Tianzhou 2 and Tianzhou 3 docked to the ports.

Tiangong Space Station in front of the Sun on February 10, 2022 (Click for full size)

To see the solar panels on the space station and the spacecrafts, I needed to observe it crossing in front of the Sun. Fortunately, a sighting opportunity took place just two days later and I was able to get a good look. Both the large panels on the core module and the smaller ones on the spacecrafts were visible.

Tiangong Space Station zoomed in at night and day

With the shots zoomed in and stacked, you can see the individual parts more clearly. The length of the object is about 38 meters (Tianhe: 16.6m, Tianzhou: 10.6m each), which came out to be about 30 pixels long when I shot it on February 8 at 413km away. This is roughly 1/3 the size of the ISS. If there were no spacecrafts docked, it would have looked much smaller and less distinct. On February 10, it was 576km away, so it came out to be smaller at about 20 pixels. I may be able to get larger Sun-crossing shots in Summer when the maximum altitude of the Sun is higher.

Device: Nikon P1000
Settings: 3000mm - f/8 (ISO 800 - 1/800s / ISO 200 - 1/1250s)
Filters: None
Time: 2022-02-08 19:03:59 / 2022-02-10 12:11:53 KST
Location: Haenam / Gangjin, Korea
20 / 23 video frames processed with Pixelmator Pro 2.3.5
10 / 14 video frames stacked with RegiStax

First sunrise of 2022

Watching the run come up above the mountains on 7:55 AM, January 1, 2022

The morning of the new year's day of 2022 was clear, making it great for capturing a nice view. Here's the photo and the video of the observation. I hope everyone have a wonderful year ahead.

Defined tags for this entry: , , , , ,

Interview in the January 2022 issue of MotorTrend Korea

My interview "How the Korean Steve Jobs drives an EV" starts at page 68 of MotorTrend Korea January 2022 issue

Earlier this month, MotorTrend Korea did an interview and a photo shoot with me at a coffee shop since they wanted to do an article on an EV specialist. The result of this appears on the January 2022 issue as a part of the special focus on the electric vehicles. It was a great opportunity to talk about the present and the future of the EVs, as well as promote a bit about my book.

Copyright (C) 1996-2021 Wesley Woo-Duk Hwang-Chung. All rights reserved.