Bonanza 36
Flight Crew Flight Engineer; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 45; Flight Crew Total 7200; Flight Crew Type 1000
Time Pressure
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Landed in Emergency Condition; Flight Crew Requested ATC Assistance / Clarification
Aircraft
Taxied the aircraft from the FBO to Runway XXL; run-up was fine; magneto checks were fine; takeoff roll was fine. Upon rotation although engine indicating proper takeoff manifold pressure; it was barely producing power and the aircraft was barely climbing. Engine began to sputter. ZZZ Tower noticed we were not climbing; and I advised them of engine issue. Tower asked to take a heading of 060 to make a downwind back to the runway. We were very low; very slow and the stall warning was sounding. The engine was running but barely producing power. We managed to climb to approximately 350 feet; maintained a southeast heading. GPS showed ZZZ1 was ahead; I advised ZZZ we were headed there. Water on the way seemed a lot softer than the crowded city. Once Runway X at ZZZ1 was assured; I selected gear down; full flaps and landed without incident.
BE36 pilot reported a partial power loss after takeoff that resulted in diversion and an uneventful landing.