Back to back racing

As paying regatta entrants, doing it largely for enjoyment, how many races do you think it is fair to be expected to race one straight after the other back to back, with the resultant early timeout and lack of equipment (and body) maintenance between races?

Assuming on the sea. Given about 1 hour per race ,  1 hour in and out. 40mins between races (for the 1st boat), 3 races per day makes 6 hours on the water. Not unreasonable. Take some water, energy drinks and cereal bars - not a problem. Can be grim at either end of the wind spectrum.

If I've travelled to go sailing that is what I want to do. For a multi-day event there should though be some flexibility in the SIs to shuffle the programme by adding subtracting 1 race per day on the discretion of the PRO.

Depends how long the races are, doesn't it?  I have to say, reading the RS100 Nats reports I was wondering what genius decided to make one of them an "extra long" race.

B14 TT events we usually do three back-to-back, of 50-60 minutes. If it's the Musto guys that have organised it (often shared TTs), it'll be four, but a bit shorter.

I think it also depends upon the length of the regatta somewhat.

Thought the 200's got it about right couple of weeks ago, originally scheduled for 2 per day but when we got behind we went to 3,  which wasn't horrendous  but when it got windy the last beat of the last race was a struggle, glad they didnt try for 4.

I think at a championship lasting a few days, it's reasonable to expect to be on the water 4-5 hours a day. Assuming it's a commute to the race area, that's two longish or three shortish races. For shorter events a longer day on the water may be acceptable.