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Piper PA-34 Seneca
PZL Mielec M 20 Mewa


piper-pa34
Seneca II


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 200 hp / 149kW Avco Lycoming IO-360 flat-four engines.

Early models, the Seneca I, handled awkwardly and were slower than expected and the Seneca II incorporated improvements including: turbo-charging, larger and redesigned ailerons and improved stick forces. For 1975 149kW Continental TSIO-360-E turbocharged and counter-rotating engines were introduced and the landing gear was strengthened for operation at higher gross weight, the designation then changing to PA-34-200T Seneca II.

Many Seneca I have been upgraded to Seneca II standard featuring turbo-charged engines and improvements to ailerons, rudder and the stabilator to improve handling.

In 1982 the Seneca II was superseded by an improved PA-34-220T Seneca III. A total of 28 improvements changed the II into the III, and while most of these are cosmetic, the two most significant are further increases in available power, and weight - most of which means useful load. A five minute take-off power rating increases 20 hp to 220, an rpm increase from 2575 to 2800, and an increase in MTOW of 180 lbs. This translates to a 190 lbs increase in useful load. The Seneca III has Continental TSIO-360-KB turbocharged and counter-rotating engines.

The PA-34-220T Seneca III remained in production in 1984.

 

Piper-Senec3
Seneca III

 

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. The production version M-20 03 was one of the very few light-twins on the market.

A total of 4,464 Seneca were delivered by 1 January 1991.

New Piper continued production of the Seneca V.

Certification was under FAA A7SO for:

PA-34-200
34-7250001 to 34-7250189 when kit number 760607 is installed.
34-7250190 to 34-7250214 when kit number 760611 is installed.
34-7250215 to 34-7350353
34-7450001 to 34-7450220

PA-34-200T Seneca II
All, except with kit number 764-048V or 765-110 installed.

PA-34-220T Seneca III
All, except with kit number 764-099V or 766-203 installed

PA-34-220T Seneca V
3440991 and up, except with kit number 766-632 installed or Avidyne Entegra System installed

Specifications:

PA34-200T Seneca II
Engines: 2 x Continental TSIO-360-E, 200 hp at sea level, 215 hp at 12,000 ft
Seats: 6/7
Wing loading: 22 lb/sq.ft
Pwr loading: 11.4 lb/hp
Gross wt: 4570 lb
Empty wt: 2788 lb
Equipped useful load: 1654 lb
Payload max fuel: 916 lb
Range max fuel/ 75% pwr: 864 nm/4.5 hr
Range max fuel / 55% pwr: 998 nm/ 6.1 hr
Service ceiling: 25,000 ft
Cruise 75%: 190 kts @ 20,000 ft
55% cruise: 165 kt
Vmc: 70 kt
Stall: 61-63 kt
1.3 Vso: 79 kt
ROC: 1340 fpm
SE ROC: 225 fpm @ 90 kt
SE Service ceiling: 13,400 ft
Min field length: 1568 ft
Fuel cap: 588/738 lb
Undercarriage: retractable
T/O dist (50 ft): 1240 ft
Ldg dist (50 ft): 1860 ft

PA34-220T Seneca III
Engine: 2 x Continental, TSIO-360KB & LTSIO-360KB, 220 hp @ 2800 rpm (5 min), 200 hp @ 2600 rpm continuous
TBO: 1800 hr
Prop: Hartzell 2 blade, constant speed 76 in
Seats: 6/7
Length: 28.5 ft
Height: 9.9 ft
Wingspan: 11.86 m / 39 ft 11 in
Wing area: 209 sq.ft
Wing aspect ratio: 7.4
Max ramp wt: 4773 lb
Max take off wt: 4750 lb / 2155 kg
Standard empty wt: 2875 lb
Max useful load: 1898 lb
Max landing wt: 4513 lb
Wing loading: 22 lbs/sq.ft
Power loading: 11.4 lbs/hp
Max useable fuel: 738 lb
Climb rate: 1400 fpm @ 89 kt
Climb gradient: 903 ft/nm
Rate of climb @ 8000 ft: 1275 fpm
Certificated ceiling; 25,000 ft / 7620 m
SE rate of climb: 240 fpm @ 92 kt
SE climb gradient: 157 ft/nm
SE ceiling: 12,300 ft
Max speed: 196 kt
Cruise @ 65% power @ 8,000ft: 164 kt
Cruise @ 65% pwr @ 18,000 ft: 180 kt
Fuel flow @ 65% power @ 18,000ft: 121 pph
Endurance @ 65% power @ 18,000ft: 5.8 hr
Stalling speed clean: 65 kt
Stall speed gear/flaps down: 62 kt
Turbulent air penetration speed: 140 kt
Retractable undercarriage
Cabin length: 125 in
Cabin height: 49 in
Cabin volume: 195.3 cu.ft
Fuel capacity: Std: 371 lt, Optional: 484 lt
TO dist: 920 ft
Landing dist: 1218 ft

Piper PA34 - 220T Seneca IV
Engines: 2 x Teledyne Continental TSIO / LTSIO 360 KB, 232 hp
Length: 28.576 ft / 8.71 m
Height: 9.908 ft / 3.02 m
Wingspan: 38.911 ft / 11.86 m
Wing area: 208.714 sq.ft / 19.39 sq.m
Max take off weight: 4749.6 lb / 2154.0 kg
Weight empty: 2853.3 lb / 1294.0 kg
Max. payload weight: 1920.6 lb / 871.0 kg
Max. speed: 196 kt / 363 km/h
Landing speed: 64 kt / 119 km/h
Cruising speed: 193 kt / 357 km/h
Take off distance: 1211 ft / 369 m
Landing distance: 1978 ft / 603 m
Service ceiling: 25000 ft / 7620 m
Wing loading: 22.76 lb/sq.ft / 111.0 kg/sq.m
Range: 990 nm / 1833 km
Crew: 2+4

2007 Piper PA34-220T Seneca V

Engines: Continental TSIO-360-RB, 220 hp
TBO: 1800 hr
Fuel type: 100/100LL
Propeller: Hartzell CS/2-blade
Landing gear: Tri./Retr.
Max ramp weight: 4773 lb
Gross weight: 4750 lb
Landing weight: 4513 lb
Empty weight, std: 3393 lb
Useful load, std: 1380 lb
Usable fuel, std: 122 USgal
Payload, full std. fuel: 648 lb
Wingspan: 38 ft. 10 in
Overall length: 28 ft. 7 in
Height: 9 ft. 11 in
Wing area: 208.7 sq. ft
Wing loading: 22.8 lbs./sq. ft
Power loading: 10.8 lbs./hp
Wheel size: 6.00 x 6
Seating capacity: 6
Cabin doors: 2/3
Cabin width: 49 in
Cabin height: 42 in
Cruise speed 75% power: 197 kt
Cruise speed 65% power: 190 kt
Fuel consumption 75% power: 26.4 USgph
Fuel consumption 65% power: 22.8 USgph
Cruising range: 828+  nm
Vso: 64 kt
Best rate of climb (SL): 1462 fpm
Service ceiling: 25,000 ft
Service ceiling, SE: 16,500 ft
Takeoff ground roll: 1143 ft
Takeoff over 50 ft. obstacle: 1707 ft
Landing ground roll: 1400 ft
Landing over 50 ft. obstacle: 2180 ft

PZL Mielec M 20 Mewa
Engines: 2 x Teledyne Continental TSIO 360 KB, 217 hp
Length: 28.609 ft / 8.72 m
Height: 9.908 ft / 3.02 m
Wingspan: 38.911 ft / 11.86 m
Wing area: 206.454 sq.ft / 19.18 sq.m
Max take off weight: 4564.4 lb / 2070.0 kg
Weight empty: 2910.6 lb / 1320.0 kg
Max. speed: 194 kts / 360 km/h
Landing speed: 60 kts / 112 km/h
Cruising speed: 168 kts / 311 km/h
Initial climb rate: 1496.06 ft/min / 7.60 m/s
Service ceiling: 25000 ft / 7620 m
Wing loading: 22.14 lb/sq.ft / 108.0 kg/sq.m
Maximum range: 990 nm / 1833 km
Range: 670 nm / 1240 km
Crew: 1+6

 

 


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