Is a new sail flat?

I'll tell you now, that sail is not "setting well"....
Well, yes, I was speaking with tongue in cheek. It is not only painful to look at but also the fluttering leech is a bit of a pain. That has only started in the last week or so. I think I may have asked a bit too much of it.
I am torn between a new sail or trying a secondhand dinghy sail, which I'm sure I could find in a suitable size.
The only thing is I would like at least a reefing point and dinghies seem very light on them
On the other hand £400 for a sail for a very cheap boat is adding too much value.

Still, I should think it'll blow out in the next few months anyway so I'll need to make a decision.
 
correct draught for conditions

In light winds you want a pretty baddy sail, it will give you the most drive. However you will also get more drag, more heal and less windward ability. So in stronger winds you want very shallow sail draught wich will create less drag and more windward ability. It is much easier to add draught to sails than remove it so you want a pretty flat sail and adjust it with halyard tension and outhaul.
 
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