Mercedes W10 rear wing airflow explained with flow-viz

Testing usually sees teams apply flowviz paint on their cars to visualize airflow on certain car elements. They do so to verify the findings from the windtunnel and detect any unwanted effect that was not simulated.

So did Mercedes, revealing airflow on the suction surface of the rear wing and its endplates (flows D and E).

It is clear in the image that airflow has drawn straight lines onto the suction surface of the main flap. This shows perfect laminar flow, as one would expect with this element.

Things get interesting when we look at flow behind the upper flap. As additional high speed flow is injected through the slot, the laminar flow is even more obviously 'painted' onto the wing (A).

However, it doesn't remain as such, as about halfway up the flap, flow separates from the wing (obvious by the unpainted section B). It later rejoins the wing in a turbulent fashion (C).

This is called a laminar separation bubble, an aerodynamic effect that can happen due to a strong adverse pressure gradient - and related velocity drop - along the surface, which makes the laminar boundary layer separate from the wing surface.

As the flow is separated, it transitions to a turbulent flow, increasing the momentum transfer into the boundary layer and leading to a reattachment.

Now, what does this mean for the Mercedes W10? The flow pattern that we see is perfectly acceptable. It shows that the wing is working airflow extremely hard. In fac…

Tick follows tock follows tick…

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Fixing attribute completion in Emacs nxml-mode

I write most pages on this website in an XML format source file, and use emacs to edit those sources. I’m very happy with how nxml-mode works with prose-style XML, making it much more usable than other environments seem to be. But recent changes (with emacs 26.1, IIRC) put a bit of grit into the environment.

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The post Bicycling Magazine Cover and Interview appeared first on Bikes 'N' Stuff.

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The post New Year, New Sponsor! appeared first on Bikes 'N' Stuff.

Joan Ryan quits Labour and joins the Independent Group

Another Labour MP, Joan Ryan, has tonight announced she is leaving the party to join the Independent Group. This is…

The choice is clear for Labour MPs. Stay with Corbyn or leave the party | Rafael Behr

The idea of a ‘broad church’ makes no sense when its congregants don’t profess the same political faith

There is a phrase that has a lot of currency among Labour MPs who hate the direction their party has taken under Jeremy Corbyn. They say they will “stay and fight”. The vow is sometimes taken in private, sometimes declared on social media alongside a plea for others to do the same. It has become so familiar that its meaning is rarely interrogated.

But what is this fight? Who is it against? What does victory look like? The answers are not comfortable for the stayers. The enemy is the elected leader of their party and he enjoys the overwhelming support of its members. Corbyn’s position is so unassailable that his would-be assailants hardly dare to criticise him. They grumble about Labour’s position on Brexit and agitate for the endorsement of a second referendum. They express horror at the way antisemitism has eaten into the party like gangrene and demand surgical intervention. But in public, the dissenters avoid pointing blame squarely at the leader or even at individuals in his entourage.

The fact that they have taken action exposes the passivity of the remaining anti-Corbyn rump

Related: A poll shows support for Labour’s defectors – it could tempt Tory MPs to follow | Gaby Hinsliff

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Getting downforce through the rear wing endplate

Renault F1 have arrived at Barcelona with an interesting update on their car, one that was photoshopped away from its launch renderings.

It may appear like a no-brainer, but Renault has become the first team to generate proper downforce through vanes on the rear wing endplates. While other teams limit themselves to vertical vanes that help clean up the flow or inject some more airflow underneath the rear wing, Renault have taken a different approach.

Still going on with the aerodynamic development of the curved rear wing endplate, the connecting vanes between the upper and lower section of the endplate are shaped to guide airflow upwards, working along with the rear wing and the upward pointing

We’re moving: Message to JA on F1 readers

The JA on F1 blog is moving. After ten years in its current guise, the content and comments will all be migrated to the Motorsport.com platform. The migration will happen today February 19 and you can find the content and the community here on this link. You will be able to login with your account, […]

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The Grand Tour Diaries 2018: OUT NOW!

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Mercedes’ main rival? Ferrari F1 launch the SF90

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David Squires on ... Hakeem al-Araibi and bona fide hero Craig Foster

Our cartoonist celebrates the tireless efforts to secure the refugee footballer’s safe return

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General Motors Unveils Crowdsourced Name For New E-Bike Brand: ARĪV

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Solskjær’s stumble, a Wembley rumble and Banks of England – Football Weekly Extra

Max Rushden, Barry Glendenning, Philippe Auclair and Lars Sivertsen discuss Solskjær’s stumble, Wembley’s rumble, a momentous first Champions League VAR, Declan Rice’s defection to England and the passings of two football legends

Join the conversation on Facebook, Twitter and email.

We look back at the last couple of days of football, starting with PSG inflicting the first defeat of Ole Gunnar Solskjær’s tenure as Manchester United boss, as they take a 2-0 scoreline back to the Parc des Princes in three weeks time.

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The title defender? Mercedes F1 launch the W10

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Maintenance Course Rutland Cycling

I was there for the first of the series, which included things such as how to do an M check of your bike, how to fix a puncture and know which innertube you should buy. The great thing about the course is the instructor gives a talk and then it's hands-on time so you can try yourself, the best way to learn. Rutland has bikes on hand that you can practice on or you can use your own bike if you like.

Deal or no deal, both Labour and the Tories will split over Brexit | Rafael Behr

Under May and Corbyn, the two broad churches of English politics are shrinking into intolerant sects

A casual observer seeing Theresa May and Jeremy Corbyn exchange rhetorical blows over Brexit in the Commons today might imagine that they stand on opposite sides of this totemic issue. But veterans of the debate know they are equal in determination that Britain should leave the EU. They are separated from consensus by small technical matters that can, for theatrical effect, be inflated into irreconcilable differences. That process is testimony to the hold that the two-party system exerts over English politics and to much of what is wrong with it.

Brexit keeps promising to break party lines and then failing to do so. That is partly because pro-Europeanism and the British left stand on overlapping cultural ground. The remain proposition goes well beyond attachment to EU membership: it is driven by revulsion at the nativist spirit of Brexit’s marauding generals – Nigel Farage, Boris Johnson, Jacob Rees-Mogg – and shock that they have hijacked Britain’s political identity. But that dismay is not exclusive to Labour. It is felt by liberal Tories and swing voters who just pine for competent, rational government.

Related: There’s only one way to head off Theresa May’s threat of no-deal chaos | Zoe Willlliams

How many voters would identify with a movement born in simultaneous aversion to Corbyn and Brexit? No one can be sure

Related: Why th…

Renault RS19 technical analysis

As has been the case with the other two launches I have prepared both video content and the usual written article to accompany it too. The written content can be found over on my Patreon page, whilst the video can be seen below...

Renault F1 take the covers off the R.S.19

Renault F1 are the latest team to display their car ahead of the 2019 campaign, the RS19. The French marque are the fourth team to host a launch and provide a taster of F1 2019, and they will continue with their black and yellow livery. A colour scheme which has proven popular, the team went […]