-----------------------------+------------------+------------------+------------------ | ~1912-13.~ | ~1912-13.~ | ~1913.~ | Monoplane. | Biplane. | Hydro-aeroplane. -----------------------------+------------------+------------------+------------------ ~Length~ feet (m.)| 31 (9.7) | 31 (9.7) | ~Span~ feet (m.)| 55-1/4 (16.8) | 57 (17.8) | ~Area~ sq. feet (m squared.)| 376 (35) | 495 (46) | {total lbs. (kgs.)| 1234 (560) | 1434 (650) | ~Weight~ { | | | {useful lbs. (kgs.)| 1808 (820) | 2006 (910) | _Building._ ~Motor~ h.p.| 95 N.A.G. | 95 Mercedes | {max. m.p.h. (km.)| 120 (75) | 115 (71) | ~Speed~ { | | | {min. m.p.h. (km.)| ... | ... | ~Endurance~ hrs.| 5-6 | 4-6 | Number built during 1912 | 6 | 16 | -----------------------------+------------------+------------------+------------------ Remarks.-- [Illustration: Mars. Biplane.] MROZINSKI. Bernard Mrozinski, Berlin-Wilmersdorf. Established 1912. [Illustration] ~Length~, 23 feet (7 m.) ~span~, 32-3/4 feet (10 m.) ~area~, 215 sq. feet (20 m squared.) ~Weight.~--661 lbs. (300 kgs.) ~Motor.~--20 h.p. Anzani. ~Speed.~--50 m.p.h. (80 km.) Remarks.--One machine only built in 1912. ~O~ OERTZ. Max Oertz, Yachtwerft, Reiherstieg b. Hamburg. Famous yacht builder. Commenced aeroplane construction in 1911. Existing models as below. Capacity about 25 machines a year. [Illustration: 1912-13 model.]