The Mistral TakeOff sail (made by Gaastra) came with the 1982 Mistral TakeOff sailboard. The boom length is 2.6m (long by todays standards). The sail is a soft pin head sail (with a single batten in the top).
The sail is as iconic as the board, but in no way comparable to the fully battened sails that came along only 3-4 years later with their stable design, superior areodynamics and short booms (typically 1.8m or less for a sail of this size)
1982 Gaastra / Mistral TakeOff 5.7
The 1982 Mistral Gaastra TakeOff 5.7sqm sail
The 1982 Mistral Gaastra TakeOff 5.7sqm sail
The 1982 Mistral Gaastra TakeOff 5.7sqm sail
The 1982 Mistral Gaastra TakeOff 5.7sqm sail
The 1982 Mistral Gaastra TakeOff 5.7sqm sail
The 1982 Mistral Gaastra TakeOff 5.7sqm sail
1982 Mistral catalog page showing TakeOff board and sail (made by Gaastra)
Some videos featuring this sail
Awesome session with the Mistral TakeOff and its original TakeOff 5.7 sail.
This sail is suprisingly easy to use and a total breeze to rig. The biggest suprise was thinking the 2.6m boom would be unweildy, but I hardly noticed it. What I really loved was how powerful and light this sail is.
The original TakeOff sail is actually very user friendly. It is light and has plenty of power. The pin head design can make it a little tricky if you are trying to deep water start but once up it handles very well. No flapping just constant power.
My second Mistral TakeOff board came with a modified original sail. The modifications include the addition of an extra batten mid way down the sail and reduction of the boom (Down to about 220cm from 260cm). This video features both the restored board and more discussion about the sail.