#extradirty
Cosmic Funnies
wallacepolsom
Peter Solarz
祝日 / Permanent Vacation
JVL
styofa doing anything
shark vs the universe
PR's Tumblrdome
@theartofmadeline
Three Goblin Art
Not today Justin
occasionally subtle
Origami Around
oozey mess
Xuebing Du
if i look back, i am lost
Show & Tell
roma★
★
seen from Canada
seen from Brazil
seen from Australia
seen from United States
seen from Türkiye
seen from Türkiye
seen from Greece
seen from United States
seen from United States
seen from Albania
seen from United States
seen from United States
seen from United States
seen from United States
seen from United States
seen from United States
seen from United States
seen from United States
seen from Malaysia
seen from Spain
@changeyourangles
Truck geometry (tbw)
IntroductionTilt/TurnBalance lineAxle offset (or rake)ExampleLateral motionVertical motionTrailWheelbase and pivot axis anglesAngle between kingpin and pivot axis Introduction Picture 1PA=pivot axisOFST=axle offset (aka rake)KP=kingpinPIVOT PIN=pivot pin axis(Taken from https://atlastruckco.com/) In what follows, a “truck” is any single-pivot mechanism that allows the wheels to turn when it is…
The case against Bennett Vector: abridged
The case against Bennett Vector: abridged
A few years back, a heated debate unfolded in an online forum about one of the most polarizing pieces of gear in long-distance pumping (LDP): the Bennett Vector truck. Riders were split—some saw it as a flawed relic, others as an irreplaceable classic, with arguments ranging from technical analysis to almost mystical beliefs about its performance. I was one of its critics, and this abridged…
Stooge 3-link truck: skating in never-never land
A fantasy steam punk machine which looks kinda cool, if that's your thing, until you realize it can't possibly exist, because it violates the laws of nature and logic. #dhlongboarding #longboarding
I won’t spend any time introducing this truck, or its North-American maker. If you want to know more about the later, who genuinely and unironically identifies as “Moe and Mrs. Moe,” watch a few seconds of one of their YouTube videos, and don’t let me impose my own prejudices on you.This is how I will go about this: I will build a model of the truck, which requires that you, dear reader, make…
View On WordPress
Skateboard geometry: balance line
Skateboard geometry: balance line (aka "roll center") #longdistancepumping #longdistancepush #dhlongboarding #longdistancepushing #longdistancepump #longboarding #slalomskateboarding #distanceskating #longdistanceskating #surfskate #dhlongboarding
The black line is the skateboard’s balance line. It remains fixed in space The basic idea I’d like to convey with this post is that a skateboard always balances on the line that connects the two centers of the axles of the trucks. What is usually called “roll center” can only make sense on a skateboard as this line. I’d call it the “balance line” of a skateboard.This is true of all trucks,…
View On WordPress
Torsion Tails: a closer look
G|Bomb Torsion Tails: a closer look #longdistancepumping #longdistancepush #gbomb #longdistancepushing #longdistancepump #longboarding #distanceskating #longdistanceskating
IntroductionBackgroundNot a 0° truckEach side only lowers when tilted, the lower side also comes closerTorsion and bendingBushingsTTXConclusion Introduction Diagram 1. Torsion Tail (TTX) parts (source) The Torsion Tails are a line of rear trucks made by GBomb specifically for platform decks. They are the most experimental product that GBomb markets and they are a work-in-progress. It is…
View On WordPress
MelonenKacke: interview with Lena
Meloneckacke: Interview with Lena Meringdal. Topic: her skate brand, lineup, R&D and marketing. #longdistancepumping #longdistancepush #longdistancepushing #longdistancepump #longboarding #slalomskateboarding #distanceskating #longdistanceskating
PrologueBeginningsLineupCorkCompetitiveMarketingFutureEpilogue Surfing the social networks of the distance skating scene, one soon notices photos of platform decks with the MelonenKacke brand. These decks are characterized by bold graphics and even bolder shapes. You can’t have missed them. Their graphics are veritable eye-candy: lushly colored, loose in form, usually space-age-themed drawings,…
View On WordPress
The distance skating scene: a miniature market oligarchy
The distance skating scene: a miniature market oligarchy. #longdistancepumping #longdistancepush #dhlongboarding #longdistancepushing #longdistancepump #longboarding #slalomskateboarding #distanceskating #longdistanceskating
IntroductionThree spheres, insulatedInteractionsCommunicative constitutionOligarchyConclusion To fully describe the scene, I probably need more than one post. Not only would a single post for that be too long, but also I would find it hard to keep it coherent. I’ve started compartmentalizing the whole thing by first of all writing my thoughts just on what the sport in question is (here). The…
View On WordPress
Curfboard: a closer look
#Curfboard: a closer look #longdistancepump #longdistancepumping #longdistancepushing #longdistancepush #longboarding #surfskate #distanceskateboarding #distanceskating #longdistanceskating
Purpose of the article Picture 1 The Curfboard truck came to my attention when someone asked me whether it makes geometrical sense in the same way that Major Arc trucks don’t. As soon as I saw it and the principle on which it turns (picture 1), I was intrigued. At first glance, there is no inconsistency about the mechanism: the design is foolproof and flawless. Still, I want to dig a bit deeper…
View On WordPress
TKP trucks: history and quirks
#new TPK trucks: two ubiquitous but inessential characteristics, which truck makers ought to reconsider #longdistancepump #longdistancepumping #longdistancepushing #longdistancepush #ldp #dhlongboarding #changingangles #longboarding #slalomskateboarding
Image link The TKP template has been with us entirely unchanged for many decades, during which materials technology and consumer needs have evolved. While it has nothing significantly different to the RKP template (as I explained here), it is fascinating to me that the original form of the TKPs is preserved by manufacturers like an endangered animal species or an ancient ritual. Likewise, many…
View On WordPress
Ideal truck angles
#newpost How do we decide which angles our trucks should be wedged to? In this post I explain my process. #longdistancepumping #longdistancepush #dhlongboarding #longdistancepushing #longdistancepump #ldp #changingangles #longboarding #slalomskateboarding
A very frequent question in online skate communities concerns the “appropriate” or “recommended” wedging; in essence the angle of the trucks. It comes either from beginners setting up a new board, or advanced skaters who purchased a new truck. This question attracts a downpour of apocryphal inaccuracies (note to self: start keeping screenshots). I’ve read that all TKPs should be wegded to have…
View On WordPress
The roots of LDP: distance sports or slalom?
#newpost Is LDP a kind of skateboarding, or a distance skating sport? #longdistancepumping #longdistancepush #longdistancepushing #ldp #longboarding #slalomskateboarding #distanceskating #longdistanceskating
Slalomer pic link, LDPer pic link I am in the process of putting together an article on the LDP scene; how it operates, who the main actors are and which interests are involved, but it became apparent that the sport in question hasn’t been completely outlined. Before setting out to understand the scene, we better have a definition of the sport around which the scene revolves. I’ve realized that,…
View On WordPress
Major Arc: a couple of problems
Major Arc: a couple of problems. A post about a design that doesn't (and could never) actually work. #longdistancepump #longdistancepumping #longdistancepushing #longdistancepush #ldp #dhlongboarding #changingangles #longboarding #slalomskateboarding
Major Arc entered the skateboard market sometime in 2020. Their marketing is rather fishy, but I focus on that in another post. Here, I examine their truck and the faulty principle on which it was designed. Specifically, I will look at three problematic aspects that make it completely unusable and perhaps unsafe.The first (and admittedly minor) problem has to do with the fact that each truck…
View On WordPress
RKP-TKP: Term pertinence
Short post about why the terms "TKP" and "RKP" do not really tell us much about how trucks work. #longdistancepumping #longdistancepush #dhlongboarding #longdistancepushing #longdistancepump #ldp #changingangles #longboarding #slalomskateboarding
I tried to bring the images to a similar scale (using bushing width as a reference), so that we can see the TKP is clearly smaller. In this short post I want to explain why I think the terms “TKP” and “RKP” do not really tell us much about how trucks work.Traditional kingpin trucks (TKPs) appear to originate from the trucks used for “quad” roller skates, before skateboarding was invented (hence,…
View On WordPress
Ultraskate 2021 amidst a pandemic
Ultraskate 2021 amidst a pandemic
The American Ultraskate is the highest-profile competition of distance skateboarding. It takes place annually in Miami and it attracts skateboarders from all around the world and significant (social) media attention. It is organized by the SkateIDSA (sic; henceforth “Skate IDSA,” or just “IDSA”), an NGO which also provides insurance to “sanctioned” events in the USA for a fee. The IDSA, which was…
View On WordPress
Wheelbase: the case for short decks
In this post, I want to make the case for a turn to shorter decks. #longdistancepump #longdistancepumping #longdistancepushing #longdistancepush #ldp #dhlongboarding #changingangles #longboarding #slalomskateboarding
In this post, I want to make the case for a turn to shorter decks. First, I explain why long decks are redundant, then I list the advantages of short-wheelbase decks and finally I attempt to answer exactly how short decks should/could become.IntroductionThe idea that a long wheelbase is necessary for so-called “LDP” skateboarding is cemented by the marketing of “LDP-specific” decks and fostered…
View On WordPress
Pivot axis angles and wheelbase (open)
Pivot axis angles and wheelbase (open)
Wheelbase and front and rear truck angles are directly related. In the following illustration, if the turning radius*KO (red and yellow points) is to remain constant (for a specific lean of the deck) regardless of how long the deck is, then the pivot axes’ angles have to change accordingly. Visualize this yourself: imagine the deck (purple ellipsis) being longer, along the dashed purple line, and…
View On WordPress
Truck geometry (open)
Tilt/Turn
Axle offset (or rake)
Example
Lateral motion
Vertical motion
Trail
Wheelbase and p.a.a.
Kingpin/p.a. angle
Disclaimer on the terminology: most of it is entirely arbitrary. Why? Because to my best knowledge, a standard terminology has not been established for skateboarding. Terms used by skaters and companies alike are loans from car/bicycle engineering. I have adjusted and/or invented a few…
View On WordPress