The only information I have about these five projects of the WWI Phönix-Flugzeugwerke AG comes from Grosz, Haddow & Schiemer, Austro-Hungarian Army Aircraft of World War One (1993), p. 85:
1. Biplane with 350 hp engine
1916 project with Daimler 350 hp, and another 1918 project with Daimler 345 hp. Neither project completed.
2. Monoplane (no other details)
1917 project rejected by the military.
3. Type-13 recce biplane
Two-seater with C I configuration, but smaller, and with 230 hp Hiero. Possibly built and flown in 1918.
4. Fighter with rotary engine
Not completed 1918 project of a biplane fighter with 150 hp Le Rhône(St). An engine for this project was ordered. The Rhône engine was built by the Österreichische Waffenfabrik AG in Steyr.
5. Parasol Fighter with rotary engine
1918 project by Eduard Zaparka, who was then chief designer at Phönix, and with a rotary engine (type?). Prototype nearly complete at the end of WWI?
For the record, the 1920s German Phönix-Flugzeugbau (and the Austrian Österreichische Phoenix-Flugzeugwerft GmbH) built only low powered light sport aircraft and had no relation to the WWI Phönix-Flugzeugwerke, that ceased all activities at the end of WWI.
I give the complete list of the aircraft built by these very small companies.
Phönix-Flugzeugbau in Düsseldorf-Lauhausen, Germany.
LF4: 1927 low wing light sport plane, 1 built and sold (without engine) to an American customer
L2 Meteor: 1928 light sport biplane evolved from the L1 earlier built by Meteor-Flugzeugbau, 1 built with ABC Scorpion, 35 hp
L2a: 1 built with Salmson AD9, 40 hp
L2b: with Salmson AD9 for Austrian construction
L2c: with Siemens Sh13 for Austrian construction
L2d: 1 built with Salmson AD9
L2e: 1 built with Hirth HM60
L2g: with Siemens Sh14 for Austrian construction
Österreichische Phoenix-Flugzeugwerft GmbH in Wöllersdorf, Austria.
Offered the construction of the following German L2 variants (some with another engine than the German original):
- L2b with Salmson AD9
- L2c with Siemens Sh13
- L2d with Armstrong-Gennet, 80/88 hp
- L2e with Walter NZ-70
- L2g with Siemens Sh14
Six L2c and two L2g were built. Of the other variants none.
For the sake of completeness, around 1990 there was another Austrian constructor named Phönix Aircraft Flugzeugbau Ges.m.b.H. that built the Phönix Aircraft Kitfox 2 home-built. But that is not my area of interest...