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DanielR Profile picture
@DanielR33187703
Oct 1 • 4 tweets • 2 min read • Read on X
1. A russian solder with a machine gun is riding a curious-looking vehicle. What is this? Is it a fancy russian military thing? Image
2. Turns out the russian soldier is using an electric mobility scooter. These come in various configurations. The russian got lucky as his scooter has the optional golf-cart tires, which will be helpful in a war zone. Image
3. These scooters are also available in high-visibility colours. Note that this yellow one has the same brace as the russian’s scooter. Top speed is about 45 km/h, which will amuse Ukrainian drone pilots. Image
4. It appears that the second army of the world has sunk quite far. In February 2022, *all* of the experts predicted Ukraine would quickly fall. No one predicted russian soldiers would come to rely on donated equipment including (surprise!) a mobility scooter.

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More from @DanielR33187703

DanielR Profile picture
Oct 3
1. Why is a russian soldier very happy to receive an 8-year-old NanFang 150 cc motorcycle? The answer has a lot to do with #drones and why speed matters. Image
2. In #Ukraine, armed drones are deployed by the thousands, and constantly attack vehicles & soldiers. Without costly electronic countermeasures, small drones are difficult to defend against. Image
3. These drones are mostly repurposed hobby-grade toys that were never intended for this application. For combat, they have to carry a heavy munition & heavy battery many km, and then chase down a target. All that weight limits its top speed to about 100 km/h. Image
Read 17 tweets
DanielR Profile picture
Sep 17
1. Ukraine crowd-sourced a multi-role drone called Besomar (a powerful demon). Like many small drones in Ukraine the Besomar was developed at very low cost, i.e., UAH600k (US$15k). Half of the money came from donations and half from government. @sambendett Image
2. The Besomar is not very big with an approximately 2 m wingspan. It can be launched from a rail or by hand. With current electronics, flight time is 60 minutes and the range (distance from base station) is 30 km. Image
3. The design is conventional and will be familiar to builders of RC planes. A simple rectangular box-type fuselage is used along with a V-tail and a single rear-mounted motor. The wings are removable but the tail is fixed in place. Image
Read 15 tweets
DanielR Profile picture
Sep 8
1. A number of post have incorrectly labelled this drone as a Ukrainian-made Palyanytsia. In fact this photo almost certainly shows a protype of a Dart 250 drone that is made by the British company Modini. Image
2. Here is a better view of the Dart 250. Note that Ukraine also has a low-cost fixed-wing drone called a “Dart” that is very different (don’t confuse them). Image
3. Modini uses very nice carts to transport its drones. Image
Read 10 tweets
DanielR Profile picture
Sep 5
1. A russian soldier surrenders to a #Ukrainian #drone by offering a trade. What is this thing that the russian is offering in exchange for his life? Is this a fair exchange? Image
2. Here is a better view of the case. It is a russian Thunderstorm electronic warfare system intended to combat drones. The controls are very simple. There are two power switches to enable the transmitters. There is also a switch & indicator for checking the battery voltage. Image
3. Removing the lid from the battery compartment reveals the underside of the controls. The battery-level board is not protected. This lid is held in place with hardware-store brackets and pop rivets. Image
Read 13 tweets
DanielR Profile picture
Aug 30
1. Ukraine announced that it had tested a long-range “rocket drone” called Palianytsia. Is this weapon, in practice, a cruise missile? This thread is a closer look at this (likely important) weapon. Image
2. Other than a few simple sketches & animations, Ukraine has released very few details about Palianytsia. The approach used here was to carefully study this public information with the aim of making a CAD drawing. From this drawing, various design aspects are considered. Image
3. How big is Palianytsia? If it uses an AI-PBS-350 turbojet engine, which is a joint project between PBS (Czech Republic) and Ivchenko-Progress (Ukraine), then the size is easily estimated. This engine weighs 51 kg with a maximum thrust of 3,400 N. Image
Read 15 tweets
DanielR Profile picture
Aug 20
1. Is it secret or not a secret? I have posted many threads detailing the technical aspects of #Ukrainian and russian #drones, including quadcopters and fixed-wing aircraft. Is any of this information secret? Image
2. There are always a few, possibly well-meaning, commenters who think my threads reveal secrets that will benefit the russians. Shown are a few select comments. Do they have a point or are they just technically uniformed? Let’s have a closer look at not-a-secret drones. Image
3. Amateurs started building radio-controlled (RC) aircraft more than 60 years ago. It was about 50 years ago that RC planes, although very expensive, became popular. This is relevant because all low-cost drones in Ukraine use hobby-grade components, which are not secret. Image
Read 22 tweets

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