Sometimes written as MacClatchie.

A seven-cylinder radial that has the name "Panther", the one in the picture is the X-2.

“Panther”

-It is called "Panther", the model is X-2, giving 150 HP at 1,900 rpm and it can reach 2,350 rpm as maximum power.

-The combustion chambers are L-type, that is, with shorter cylinders.

-We see that the covers are thick and precisely in the widest part is where the valve springs are located.

-Another photograph of this engine has been located.

“McClatchie Panther X-2”