 Tinker was amazed that Lacalle scored victories flying the very difficult Ni-52.As a leader, Lacalle was careful not to expose his fighters to unnecessary risks, as he knew how difficult it was to replace them, but when the duty called he was ready to fight under any conditions.During the Battle of Jarama Lacalle demonstrated the effectiveness of his squadron by making multiple ground attacks to support closely the republican troops, and was thus nicknamed ‘The hero of Jarama’.