Investigators are analysing the flight data recorder in an effort to find out what caused the crash.
Aiyawatt Srivaddhanaprabha, son of the Thai retail entrepreneur, brought a wreath to add to a collection of flowers, jerseys and club memorabilia that was growing after the disaster.
Match on Saturday continues as planned after club consultation following death of Leicester City owner.
Players, including Jamie Vardy and the injured Daniel Amartey, made separate trips to pay their own individual respects. Leicestershire Police have handed over responsibility for the inquiry to the Department of Transport's Air Accidents Investigation Branch (AAIB), which investigates all civil aircraft accidents in Britain.
"I have a feeling we still have a lot to improve", he said.
Ranieri, whom Srivaddhanaprabha brought in as Leicester coach in 2015, led them in their sensational run to the Premier League title the next year, defying odds of 5,000-1.
William, president of the Football Association and a keen football fan, said he was lucky to have known Mr Srivaddhanaprabha for several years.
"His warmth, humour and generosity have always been extended to my own family, something for which we will all be eternally grateful for".
It was indeed a awful day for The Foxes and the world of football at large.
"A generous man, to whom @LCFC owes everything".
"The outpouring of grief is a testament to how many people's lives were touched by those on board, " Prime Minister Theresa May said.
Police named the other victims of the crash as passengers Izabela Roza Lechowiczas, Nursara Suknamai and Kaveporn Punpare, and pilot Eric Swaffer.
Having studied night vision CCTV footage of Vichai's Agusta Westland AW169's movements seconds before disaster pilots agreed the chopper suffered a "critical failure at the worst possible moment".
The video is taken from inside the stadium and shows the chopper leave the ground and rise up before disaster struck.
Mahrez swept in the only goal after an impressive run from Raheem Sterling, who pounced on a defensive mistake from Kieran Trippier to latch onto the loose ball and then go round the Tottenham defender before reaching the byline.