The re-engineering work to cure the problem was very extensive and resulted in the second prototype being fitted with a larger tail a ventral fin and some other modifications .
A larger tail is a 6 cm ( 2 in ) higher canopy .
The re-engineering work to cure the problem was very extensive and resulted in the second prototype being fitted with a larger tail , a 6 cm ( 2 in ) higher canopy , a ventral fin and some other modifications .