This is the Brushless Motor Power Pack for the Multiplex Gemini Biplane, MPUA2142. FEATURES: Motor, speed control, propeller and adapter in one package, no need to search for individual components INCLUDES: Himax HC28160890 Outrunner Electric Motor with mount, hardware and pre-attached leads MULTIcont BL-27 Speed Control for Brushless Motors APC 10 x 5E Composite Propeller (APCQ4120) Aluminum Propeller Adapter #33 235 REQUIRES: Installing in airplane following instructions in manual SPECS: Motor- Weight: 2.7oz (77g) Max Power: 200W (dependent on several factors) Max RPM: 20,000 RPM Diameter: 1.09" (27.8mm) Length: 1.28" (32.5mm) Shaft Diameter: .1575" (4.0mm) Mounting Screw Thread: 2.5mm, max depth 4.5mm on .625 (16mm) bolt circle Maximum Case Temperature: 149°F (65°C) Kv: 890 Operating Current: 4-13A, 18A Max 15 seconds Electronic Speed Control- Cell count: 5-16 NiCd/NiMH, 2-3 LiPo Continuous current: Max. 27A Internal Resistance: 0.0065 Ohm Pulse Frequency: Approximately 11kHz BEC voltage: 5V BEC current: Max. 1.5A Dimensions: 1.4 x 0.98 x 0.31" (35mm x 25mm x 8mm) Weight: 0.60oz (17g) w/wires jxs 12/07/07 ir/jxs