score:3
I believe one can carry tripods on carry-on bags. But its advisable to fit that inside the luggage than strapped to backpack/camera bag. I've carried my tripod like this on two occasions.
First time I traveled on Jet Airways - a domestic flight between Bangalore and Delhi. I packed that in a kit (one similar to sports bag) and a friend who was travelling with me packed his tripod in his rucksack. We were allowed to to carry them.
Second time was on an international flight - Emirates (from London to Bangalore via Dubai). This time the tripod was in a hard case carry on bag. And there was no problem carrying it.
Jet Airways, Kingfisher and Air India being Indian airline operators - they have almost similar guidelines. So carrying a tripod on these might not be an issue.
EDIT by OP:
Upvote:2
If it can fit inside a backpack it's definitely no problem.
I've never had an issue with mine (strapped to the outside of my pack) on international flights. I've never flown on Aeroflot, Kingfisher Airlines or Air India before though.