Hello and welcome to Friday's second practice session for the Hungarian Grand Prix. Red Bull dominated the first session, with no other team able to get within a second of Vettel's best time of 1:20.976.

We suspect Ferrari and McLaren weren't going for headline times by running heavier fuel loads, but we might get a clearer picture in this session as they bolt on soft tyres.

We also had a mini debate between readers going on over team orders. Feel free to send your questions and comments during this session by clicking on the link at the bottom of this window.

Air temperature is only 23C, perhaps not as warm as we are expecting it to be on Saturday and Sunday.

Ian says: "I saw this week that Renault admitted their engines were down on horsepower. Can you tell me if the current freeze on engine development continues into next year? It seems a contradiction to me that so much development work can be done on the cars but an obvious difference in engine technology cannot be worked on. The 'car' and the 'engine' form part of the whole package and should be part of continual upgrades."

There are no plans to get rid of the engine freeze, although Renault would like to have an equalisation process. But for that to happen all the teams would have to agree and that is very unlikely. The next major change in engine regulations will be in 2013 when smaller capacity turbo engines will be introduced. KERS will return next year but that shouldn't change the difference between power outputs.

Yamamoto is the first car out on track with his HRT team-mate Senna now heading out too.

Webber is out on track with some aero paint on the front wing so the team can get a better understanding of that component.

Kobayashi is the fastest car so far but he very nearly ran into the back of Senna through the penultimate corner.

Hamilton is out on track and just like this morning is struggling to hit the apex of corners and sliding that McLaren around beneath him.

Shashank asks: "Why is Ferrari undecided on the issue of flexible front wings this weekend? Judging from Hockenheim, they did bring an improvement to the car. Is there a known reason why they could possibly ditch it this weekend?"

It's not as simple as just bolting on a new wing and it giving you an advantage. The front wing has an effect on the aero all the way down the car and if they are not sure exactly what is going on they will want to run comparisons in this session. The car was very quick in Germany but it's very difficult to tell how much of that was due to the wing. Ultimately they will do what is best for the car at the specific circuit.

Lots of traffic out on the circuit and Jenson Button says it is a "nightmare".

Alonso is now fastest with a 1:21.826 but its still off the pace of Vettel's morning pace.

Shanth asks: "Can you elaborate on that aero paint on Mark Webber's car. What exactly does it do?"

They put some luminous paint on the front of the wing and then it is spread over the car as it drives at high speed. When it comes back to the pits they can see how the air is flowing over the car. The only problem is that your rivals can also see it. Some teams use UV paint as a result and then look at the car in the garage under a UV light.

"How was the Force India blown diffuser working in FP1 and don't you think running it in a race even without much information will be helpful to gain speed as the competition from Williams is increasing very fast? "

The blown diffuser won't necessarily make the car faster until it has been tested and revised. It should improve downforce but it can also unbalance the car. Force India is testing it with the hope of running it again later in the season. This weekend the car will probably be a little off the pace as it's not that suited to the track.

Webber is now fastest on a 1:21.046 ahead of Vettel on a 1:21.324. Massa is third fastest, just 0.385 off the pace of Webber.

Webber is going faster and faster, his last lap was a 1:20.881 and he's now going even quicker on this lap. And he then sets a 1:20.838, 0.040 up on Vettel.

Force India is comparing front wings and practicing its pit stops: "A nose change for adrian for the next run."

Vettel is now quickest with a 1:20.733, it's very tight between the Red Bulls at the moment.

Alguersuari is out on the soft tyres in the Toro Rosso. He sets a 1:22.469 .

Hamilton and Button are on track in the McLarens but both are making little mistakes and visibly struggling with understeer.

Charalampos: "I know that 10 kg of fuel worth around 0.300-0.350 seconds per lap, but I have never read how these 3 tenths are distributed amongst the lap. Is it safe to assume that they are distributed evenly around the lap (1 tenth per sector)? Or if a sector has a long straight and both cars have the same top speed should we expect that the difference from the fuel would be smaller in that sector and bigger to the other sectors?"

Yeah you're right, sectors where there is more braking, turning and accelerating will be even slower on heavy fuel. But of course long straights are also affected as acceleration is slower out of the previous corner. Also 10 kilos of fuel will cost different amounts of time at different circuits depending on track length.

Shanth asks: "Any reason for the Mercedes drivers not having done more laps? Both have done only 5 laps..."

I'm not sure but they are both back on track now. Maybe they were just doing a bit of set-up work and waiting for the track conditions to improve.

The top four drivers, Vettel, Webber, Massa and Alonso are all back on track.

Rosberg returns to the pits after setting the fifth fastest lap with a 1:22.044.

Hiteshwar Jindal asks: "Normal floor way behind the blown floor is it possible that Force India might run blown this weekend if same happens?"

They only have one blown floor with them so they would have to favour one car over the other. That's not to say they won't but the plan had been just to test it. Remember we don't know the fuel loads of the cars so it might not be a true comparison to look at their fastest times.

Webber sets a new fastest lap with a 1:20.601, the two Red Bull drivers are trading fastest times at the moment. The Ferrari drivers Alonso and Massa are about 0.7-0.8 seconds off the pace of the Red Bulls.

Webber returns to the pits after setting that new fastest lap.

Simon asks: "How easy is for Massa to prepare and motivate him for new wins, if there is a clear situation, that from last few races only Alonso has a chance for championship and normally Alonso will be always promoted..?!"

It certainly won't make it easy. It'll be very interesting to see how he reacts this weekend.

Pretty

Petrov sets a new fastest first sector on soft tyres - two tenths faster than Vettel. But he loses 0.5 seconds in the middle sector.

Schumacher just ran very wide band is clearly pushing hard but is still 2 seconds off the pace.

Force India reports no overheating issues with its new blown diffuser.

Liuzzi is having problems with the tyres in this session but is a bit happier with his new set: "Tyre was a bit better, helped rear"

Latest news from Force India: "A small electrical problem has delayed Adrian Sutil in the garage"

Hamilton is out on soft tyres, the first of the front runners to do so.

Mitul Patel asks: "Ferrari is still 4 tenths slower than Red Bull. What do you think has made the difference since Germany. Do you think they will be able to catch up?"

Red Bull do look very quick but we haven't even seen them out on the soft tyre yet so I'd hold back any judgements for now. Ask the same question on Saturday and I might be able to give a more informed answer.

Hamilton is still 0.707 off the pace of Webber, who is also about to start a soft tyre run.

Massa is on the softs and skillfully sliding the car through turn 5, making minor adjustments as he takes the tyres to the absolute limit. He then oversteps the grip level and runs wide out of the chicane.

Button is also struggling for grip. Alonso set the fastest first sector of all but then had to back off in the second and third sector.

Webber goes faster but only improves by 0.004 of a second.

Alonso has now set a lap time within 0.1 of Webber but Vettel sets a time 0.5 seconds faster than Webber. Vettel's best is now 1:20.087.

The floor of Sutil's car has been taken off and there is a lot of work going on underneath the car. I doubt we will see him out on track again in this session.

Alonso has now gone faster than Webber but Vettel is going even quicker. But Vettel lost time in the final sector as he got stuck behind Kobayashi and Barrichello. There is still more time in that Red Bull but Webber is back in the garage and Vettel is heading back.

Update from Renault: "After some set up work, Vitaly is back out again, still on option tyres. A lot of traffic in this last lap for Robert. He says that he has less understeer, more grip."

Alonso is back out in the Ferrari but goes straight back into the pits.

Sutil's car is now being bolted back together and they expect to have him out on track in the next 20 minutes.

News from Lotus' Mike Gascoyne: "Jarno just done his run on options, still working on Heikki's car, should get him out for a run on the option"

Mihai: "Red Bull looks to be in a different galaxy so far. Last week in FP2 the field was much tighter. Is it possible for the others to just hide their real pace? Even now?"

It's hard to tell but Red Bull definitely looks strong. However, teams often run heavy on soft tyres on Friday and do their first light-fuel run on Saturday morning.

Hiteshwar Jindal says: "Even on softer compounds Liuzzi with normal floor no way near the lap time sat by Adrian on harder compounds."

Just to confirm, FOM do not allow us to show live timings on our website.

Vettel is now ready to head for another run on his soft tyres.

Simon Bagola says: "Just a feeling.. Red Bulls will be VERY VERY strong this weekend... 1-2, I'm afraid."

Alonso heads out as Vettel returns to the pits.

Sutil is back on track and using the soft tyres.

All the cars except Kovalainen are now out on the circuit.

Most the cars appear to be running heavy fuel loads with no personal best lap times on the time screens. So we can assume that Vettel's time is safe.

Massa told that his pace is pretty good but the Red Bull is "not too bad at all" by his race engineer Rob Smedley.

Alonso came back into the pits briefly. "We just needed to reset telemetry," says Ferrari.

At this stage most the teams have done a fast lap on lowish fuel, which we saw earlier when they set their best times, and now they are simulating the start of the race on heavy fuel - just seeing how the softs hold up.

On heavy fuel the Red Bull's are lapping in the 1:24s, the Ferraris just off in the 1:25s and Renault not too far behind in the high 1:25s.

So which ever way you cut it, teh Red Bulls look very fast. McLaren and Mercedes are a bit off the pace but it's still a bit early to be making final judgements.

Join us tomorrow for the final session and qualifying. It should be an interesting session with the two Red Bulls fighting it out for pole position. Ferrari might be able to put up a challenge but I suspect McLaren will have another weekend of damage limitation.