Today;
Barry departed Ar'ar at 0616Z en-route to Quaisumah (OEPA). Estimated flight time is 4 hrs and 41 mins although he has taken off into a 15 kt headwind.
With the given estimated flight time, how long will the flight now take with the added headwind?
Maximum speed 115 mph
Cruising speed 90 mph
Absolute ceiling 4000 m
Service ceiling 3500 m
Take-off roll 70 m
Landing roll from 0 to 30 m
Rate of climb 5 m/s
Fuel tank capacity 72 lt
Assume;
Cruise height of 500m
Times taken from toc to tod, as I would be surprised if anyone had the Magni M16 - 2000 charts available.
Bonus point; Why wasn't the headwing added for the estimation given? 