F1 Flashback: Senna disqualified on McLaren debut (VIDEO)

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Ayrton Senna’s first F1 start for McLaren ended in a controversial disqualification from his home race on this day 25 years ago.

Senna planted his Honda-powered McLaren MP4-4 on pole position at the Jacarepagua circuit in Rio de Janeiro. But as the cars prepared to take the start a gear linkage broke, Senna waving his arms calling for the start to be aborted.

The grid re-formed with Senna now starting from the pits in the spare McLaren. Nigel Mansell became the de facto pole sitter but his normally aspirated Williams-Judd was outgunned by Alain Prost’s turbo-powered McLaren.

While Prost motored off into the lead Senna was slicing his way through traffic. He came around in 21st place at the end of lap one, but by lap 13 he’d broken into the top six points-paying positions.

Thierry Boutsen (Benetton) and Nelson Piquet (Lotus) were next to succumb to the McLaren. Mansell stopped with a blown engine on lap 19 and now Senna was in a podium position. He came around the next lap in second place having dispensed with Gerhard Berger’s Ferrari.

But it was all in vain. The rules prohibited drivers from switching cars after the start had been given and Senna was belatedly black-flagged after 31 laps.

Prost ran out an easy winner – the first of 15 victories for McLaren that year in a season they dominated. But in their first season as team mates Senna ultimately proved too much for him, beating Prost to the drivers’ title.

Sadly construction work for the forthcoming 2016 Olympic Games has led to the demolition of the Jacarepagua circuit. It held ten rounds of the world championship between 1978 and 1989 and its oval course was later used for CART IndyCar races.

SMP Racing unveils BR1 LMP1 car in Bahrain ahead of WEC entry

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SMP Racing has publicly unveiled its new BR1 LMP1 car that will enter the FIA World Endurance Championship from 2018.

SMP Racing opted to pull out of racing full-time in the WEC for 2017 in order to focus on its preparations for an LMP1 entry the following year, with the decision being taken long in advance of Porsche’s exit announcement.

Officials from the Russian-backed SMP Racing, as well as drivers including recent IndyCar racer Mikhail Aleshin (sporting a broken arm in a sling), Vitaly Petrov and Sergey Sirotkin were all on hand to unveil the car on Friday in the Bahrain International Circuit paddock ahead of this weekend’s WEC finale.

The BR Engineering BR1 features a Dallara chassis and an AER engine, and has completed over 2,000 km in private testing, with further running set to be completed in the coming weeks.

SMP Racing plans to field two cars in the WEC’s LMP1 class next year, and is keen to get as many Russian drivers as possible in the seats from its wide pool of talent.

Even with Porsche’s departure from LMP1, the class is set to feature a bigger field thanks to the increased number of privateers moving up, with Toyota set to remain the sole manufacturer in the class.