Roger Sommer (4 August 1877 in Pierrepont, France – 14 April 1965 at Sainte-Maxime) was a French aviator.

[1] In 1911, Sommer experimented with the effect of different weights on various aircraft's abilities.

[2] He then went on to fly with seven, eight, and eventually twelve passengers by 24 March of the same year.

At the heaviest weight of 650 kilograms (1,430 lb), he was able to fly just under 1 kilometre (3,300 ft).

[2] After this, Sommer began working on aircraft construction.