Rookie Chilton was slowest around Silverstone, citing balance issues that saw him finish a staggering 1.7secs adrift of Marussia team-mate Jules Bianchi.
One small crumb of comfort for the 22-year-old from Reigate is that he will move up one place on the grid on Sunday as Caterham's Giedo van der Garde will serve a penalty that will drop him to last.
"It's a real shame what happened considering this is my home Grand Prix," Chilton said.
"I struggled in free practice today [Saturday] with a balance issue. We made a good change for qualifying as it definitely felt better.
"The problem was everybody else made a step forward as well, so what happened was a disappointment.
"Obviously the gap is a big one to Jules, but as Silverstone is high speed you need balance so it escalates the problem if you don't have that.
"You have to roll the speed and get through on to the exits, and at the moment I can't get through the way I want to so the gap looks bigger than it actually is.
"It's a bit of a shame, but the weekend is not over. Our race pace in practice yesterday [Friday] was good compared to those around us, so if we can keep that going tomorrow [Sunday] then we can make up for a bad qualifying
"Thankfully the fans have made me feel that bit better. There has been amazing support.
"The grandstands are full, with Union Jacks everywhere, so when you have a day like today it really does lift you."
Chilton goes into the race as the only Marussia driver in the team's history to see the chequered flag of all seven opening races, a feat he would like to extend to eight on Sunday.
"That goes to the team," added Chilton.
"They put in a good effort over the winter to make the car reliable, so hopefully I can keep that going."