Just for a laugh I went to Motocalc and tried a 65mm fan at ~550W: there is no GWS 64mm in the database.... sadly this comparably-sized Graupner fan produces nowhere near your 2.4lb (38oz)... you probably need 900W to get 38oz from a 64mm fan.

Motor: Feigao 540L 8T (5408408L); 3072rpm/V; 4.1A no-load; 0.0076 Ohms.
Battery: Thunder Power TP3300 (G4 ProPower 30C) (30C); 4 cells; 3300mAh @ 3.7V; 0.005 Ohms/cell.
Speed Control: Castle Creations Phoenix 45; 0.0026 Ohms; High rate.
Drive System: Graupner 1380; 2.3x3.36 (1.2in hub); (Pcoeff=1.015; Tcoeff=0.95).
Airframe: Anything you want.

Motor Amps = 39.9
Motor Volts = 13.9
Input (W) = 553.4
Fan RPM = 41651
Thrust (oz) = 27.6


Motor: Feigao 540L 8T (5408408L); 3072rpm/V; 4.1A no-load; 0.0076 Ohms.
Battery: Thunder Power TP3300 (G4 ProPower 30C) (30C); 5 cells; 3300mAh @ 3.7V; 0.005 Ohms/cell.
Speed Control: Castle Creations Phoenix 45; 0.0026 Ohms; High rate.
Drive System: Graupner 1380; 2.3x3.36 (1.2in hub); (Pcoeff=1.015; Tcoeff=0.95).
Airframe: Anything you want.
Motor Amps = 56.7
Motor Volts = 16.9
Input (W) = 956.8
Fan RPM = 50480
Thrust (oz) = 40.6