if you landed after exactly 10 minutes flying time, you would have 5 minutes for number 1 and 3 minutes for number 2 remaining before they flamed out.
In theory.....assuming everything works as it should and fuel burn rates are right.
By my estimation....3 Minutes to spare is cutting it mighty close
I think I would just accept the first Red Fuel Low Warning as the first item on the Before Landing Checklist.
Lonewolf_50 pointed this article out to me.....
Land the Damn Helicopter | Flying Magazine
The last paragraph sums it up!