Bruno Senna has claimed that he and Karun Chandhok should be given as many miles as possible if they and the Hispania Racing Team are to improve, rather than signing test and reserve drivers to share the load.

Speaking on the eve of Christian Klien's impending debut for the Spanish newcomer, where he would drive in place of Chandhok on Friday morning, Senna pointed out the, as the team had not completed a single mile of testing in pre-season, it was more important for the regular drivers to continue learning.

"We will have to wait until tomorrow to see if there is any benefit from the experience of the third driver in terms of the development of the car and in terms of what direction he can take the team," Senna told members of the media in the Barcelona paddock, no doubt mindful that he too will have to give up his car for Klien in future.

"But, in my opinion, because we had no testing at the beginning of the season, the race drivers must do every mile possible. You can see that very few teams are giving mileage to the third driver on Fridays and it's only because they have simulators that the drivers can go there and use. I prefer to do as many miles as I can and make sure I can get used to the car before I go to a qualifying session. For me, every mile makes a difference. Fortunately, I know this track very well, so I know I can pick up pace quite quickly, but we'll see [what happens in future]."

Klien, who steps back into an F1 car on a race weekend for the first time nearly four years, revealed that he had not heard any complaints from either of HRT's regular drivers, although he conceded that he could understand the potential for frustration.

"We walked the track together and it was a good relationship," the 27-year old told Germany's Motorsport-Magazin.com, before revealing that he does not yet know how many outings he will get, "So far, Barcelona is the first one planned, then the team will decide whether it will be the same for other grands prix."

The Austrian, who raced for Jaguar Racing and Red Bull during his brief stint as a race regular between 2004-06, very nearly did not get clearance to drive in the opening practice session, having had to renew his superlicence, which had lapsed in his absence from the top flight.

"As long as the contract was not signed, we could not even ask for a superlicence," team boss Colin Kolles explained, "It was all very last minute."

Klien was eventually allowed to participate in the 90-minute session and a magnanimous Chandhok conceded that the Austrian had exceeded his expectations.

Having told the BBC that he did not expect Klien to be that much faster than Senna during the session, the Indian admitted that the half-second gap between them, in Klien's favour, had surprised him.

"Christian has got good experience of some good teams so he could bring something," Chandhok acknowledged, "The team is a little bit behind the game, so any information we can get from other people is useful. It's frustrating for me, though, as I want to drive the car as much as possible."

One thing Klien's arrival cannot be accused of doing is propping up the finances at HRT, and Kolles was asked again about the security of the team on the eve of the Spanish event.

"I don't anticipate that the season is not guaranteed," he told reporters, enigmatically, "I don't know who has been saying that."

Asked whether plans were in place to have the team on the grid in 2011, the Romanian-born team principal revealed that, no only did it intend to be there, but it also had designs on building its own car, rather than looking for a technical partner to help out as Dallara had this season.

"The next step is that we get our own development programme running and then, for 2011, build our own car," Kolles told sport1.de, "We are going to try to improve this car as much as possible but, eventually, we will have to draw a line and focus on next year."

Although Senna has revealed that the team is running late with the aero development it had intended to debut in Barcelona, Kolles is believed to be close to securing wind tunnel time so that HRT can develop the Dallara-built chassis throughout 2010, and use that experience to hasten the team's learning curve as it seeks to become a midfield regular.

"For Force India, it took five years, but we are going to try to do it in three," he revealed, "I cannot afford to do F1 personally, so I create value for other people. I did it for Midland, for Spyker and the Mol family, and so on. The team always sold for more money because it had developed.

"And people who know about it know that I am the only one who can do it. I don't mean that arrogantly, it's quite simply because no-one else has the infrastructure and the know-know."