I can't answer what the record number of main rotor blades is but these three helicopters are the some of the largest helo's in the world and the last has 10 main rotor blades although it has no tail rotor so it depends on your definition of main rotor I guess.
Sikorsky S-64 Sky crane - Has 7 main rotor blades
Mil Mi-26 - Has 8 main rotor blades
Mil Mi-12 - Has 10 main rotor blades - was only really a prototype.
The highest recorded height for a helicopter flight was 40,820 feet. The record was set by a Frenchman, Jean Boulet, who set the record on June 21, 1972.
Adam Gilchrist holds the record of maximum number of sixes in tests.
number 27 producing a record of 4 winners
Chris Carins
emineam
virender sehwag
Lynx ZB-500 249.09 mph world record. Fastest helicopter.
JB Hobbs holds the record of hitting maximum number of 50 in first class cricket.
Jagati srikumar
What sport?
4
Saurav ganguly