Piper PA-34 Seneca
1972
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Piper PA-34 Seneca

For 1972 Piper introduced the six/seven-seat Piper PA-34 Seneca which, basically, was a twin-engine version of the Cherokee SIX with retractable tricycle landing gear, a new fuselage structure and power provided by two 149kW Avco Lycoming IO-360 flat-four engines. For 1975 149kW Continental TSIO-360-E turbocharged and counter-rotating engines were introduced and the landing gear was streng-, thened for operation at higher gross weight, the designation then changing to PA-34-200T Seneca II. In 1982 the Seneca II was superseded by an improved PA-34-220T Seneca III, and this remains the current production version in 1984. It differs from its immediate predecessor by having more powerful Continental TSIO-360-KB turbocharged and counter-rotating flat-six piston engines. During 1976-77 Piper signed an agreement with the Polish foreign trade association Pezetel under which P.Z.L. Mielec will assemble/manufacture the Seneca for sale in eastern Europe. Designated in Poland as the P.Z.L. Mielec M-20 Mewa (gull), the first Polish-built prototype was flown on 25 July 1979. Current production version is the M-20 03 one of the very few light-twins on the market. A total of 4,464 Seneca were delivered by 1 January 1991.


Specification 
 MODELPiper PA-34-220T Seneca III
 ENGINE2 x Continental TSIO-360-KB, 164kW
 WEIGHTS
    Take-off weight2155 kg4751 lb
    Empty weight1294 kg2853 lb
 DIMENSIONS
    Wingspan11.86 m39 ft 11 in
    Length8.72 m29 ft 7 in
    Height3.02 m10 ft 11 in
 PERFORMANCE
    Max. speed364 km/h226 mph
    Ceiling7620 m25000 ft
    Range1667 km1036 miles

Comments
JJ Watson, e-mail, 14.05.2011reply

Worked @ New Piper as a technical writer in 2001. nice job.
Couldn't stand the chatty tech reps next door.

Mark, e-mail, 07.11.2010reply

Few lots of Seneca I, II, and III. They flew ok... You just had to learn to load them tail heavy then the landings were a bit better.

Steven Nokes, e-mail, 26.10.2010reply

Sorry it was a 1000 hrs plus on article below

Steven Nokes, e-mail, 26.10.2010reply

I owned a 1975 Seneca II 33012 for 12years an flew it over a 100 hours and even ran 1 of the engines 700 over TBO and loved the airplane. I even took out he seats and flew jet skis to the lake to use. Was totally amazed at how well the air craft flew. Still wish I had it to this day but Biz slowed down and it had to go. My worse story was when I was parked at a FBO in Walla Walla Wa someone stole all my radio package and what a expense that was so I didn't get a strike with my Ins Company. Wish I had 33012 back!

Melvin Brant, e-mail, 13.10.2010reply

I owned the Seneca II turbo with the Continental engines. I really enjoyed flying this model. The top speed indicated by the manufacturer is not a true indicator of what you can expect cross country which is dismal for a twin. The baffling on the Continental engines invited engine problems from overheating. I lost an engine on takeoff run and was able to shut down. The Cessna 210 turbo/press is a far superior aircraft in every way.

Scott Boyd, e-mail, 25.04.2010reply

Probably the worst flying airplane I ever flew. The one I flew belonged to the Navajo tribe and had the fixed waste gate Continental engines. You could never keep the props in synch and any turbulence made it even worse.

John Ellul, e-mail, 02.01.2007reply

The Seneca 1 was certfied with the aileron and rudder controls interconected for stability requirements. I fly an old Seneca 1 and wish to know how I can tell if the system is working. When I taxi the aircraft the control wheel does not move when I push the rudder pedal. Any help would be appreciated

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