John McMahon and his compressed air driven monoplane
John McMahon and his compressed air driven monoplane
John McMahon and his compressed air driven monoplane
Frank Schober preparing his model for flight. Gauge to determine pressure of air may be seen in photograph
Frank Schober preparing his model for flight. Gauge to determine pressure of air may be seen in photograph
Frank Schober preparing his model for flight. Gauge to determine pressure of air may be seen in photograph