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Beechcraft 55 Baron / T-42 Cochise

 

beechb55baron
B55


Developed from the earlier Model 95 Travel Air, the Beech Model 95-55 Baron was first flown on 29 February 1960. It differed mainly by having more powerful 260-hp Continental IO-470-series engines, plus design refinements that included swept vertical tail surfaces, and improved all-weather capability. The B55 Barons are powered by 260-hp Continental engines, which have 1,500-hour TBOs, provided their exhaust valves are either nickel-coated or ni-monic; otherwise a 1,200-hour TBO applies.


Deliveries of the 95-55 began in November 1960 with a list price of US$58,000, and this twin-engined four/five-seat aircraft resulted in further improvement and development of the type. The original 55 Baron became the A55 model. The Model B55, introduced in 1963, had four-seat and optional five/six-seat accommodation, and in 1965 an additional Model C55 was made available with more powerful 213kW / 285-hp Continental IO-520-C engines. The Model C55 incorporated a number of improvements, including increased tailplane span and an extended nose baggage compartment, and was developed later as a separate Baron model distinct from the B55.

 

A few months before the introduction of the C55, the US Army announced that the Model 95-B55 had been chosen for military service as an instrument trainer, which was ordered in an initial quantity of 55 under the designation T-42A Cochise (65-12679/12733).
 
Beech-T42A
Beech T-42A 65-12684
 
Ten more were procured for US Army service (66-4300/4309) plus, in 1971, five for delivery to the Turkish army (71-21053/21057) under the Military Assistance Program. By 1984, production of civil and military 95-B55 Barons was in excess of 2,400 and 1,201 examples of the Model E55 (formerly C/D55) had been delivered when production ended.

 

In September 1967 deliveries began of a new Model 56TC Baron. This introduced two 283kW / 380-hp Avco Lycoming TIO-541-E1B4W turbocharged engines, providing improved performance. Air-conditioning was available as an option. The higher cost of this version of the Baron attracted only 93 sales, and production ended in December 1971.


The C55 became the D55 and finally the E55, Beechcraft’s high performance, high payload Baron. Optional equipment on the 58, E55 and B55 are heavy-duty brakes that offer up to 50 per cent greater stopping power.

 

Beech-55
B55 Baron

 

95-55
1960
Engines: 2 x Continental IO-470-L, 260 hp
Seats: 4-5
Sweptback fin and rudder
 
A55
1962
Optional 6th seat

 

BE-B55 Baron / T-42A Cochise
First built: 1961.
Engine: 2 x Continental IO-470-L, 260 hp.
TBO: 1500 hrs.
Prop: Hartzell 2 blade, constant speed 78 in.
Seats: 4/6.
Length: 28 ft.
Height: 9 ft. 7 in
Wingspan: 37 ft. 10 in
Wing area: 199 sq.ft.
Wing aspect ratio: 7.2.
Max ramp wt: 5121 lbs.
Max take off wt: 5100 lbs.
Standard empty wt: 3236 lbs.
Max useful load: 1885 lbs.
Max landing wt: 5100 lbs.
Wing loading: 25.6 lbs/sq.ft.
Power loading: 9.8 lbs/hp.
Fuel, std: 136 USG
Max useable fuel: 816 lbs.
Climb rate: 1693 fpm @ 107 kts.
Climb gradient: 949 ft/nm.
Rate of climb @ 8000 ft: 1000 fpm.
Service ceiling; 19,300 ft.
SE rate of climb: 397 fpm @ 100 kts.
SE climb gradient: 238 f/nm.
SE ceiling: 6400 ft.
Max speed: 201 kts.
Cruise @ 65% power @ 8,000ft: 180 kts.
Cruise speed, 8,000 ft 75% power: 188 kt
Fuel flow @ 65% power @ 8,000ft: 136 pph / 23.7 USgph
Fuel consumption 75% power: 27.3 USgph
Endurance @ 65% power @ 8,000ft: 5.7 hr.
Max range (w/ res) 75% power: 798 nm
Max range (w/ res) 65% power: 830 nm
Stalling speed clean: 79 kts.
Stall speed gear/flaps down: 73 kts.
Turbulent air penetration speed: 157 kts.
Retractable undercarriage.
Takeoff ground roll: 1400 ft
Landing ground roll: 1467 ft
Cabin width: 42 in
Cabin height: 50 in
Baggage capacity: 700 lb

 

C55
1964
Engines: 2 x Continental IO-520-C, 285 hp
 
D55
1968
 
E55
1970

 

Colemill Presidential 600 / Beech Baron B55
Engines: 2 x Continental IO-520-E, 300 hp.
Seats: 6.
Wing loading: 25.6 lb/sq.ft.
Pwr loading: 8.5 lb/hp.
Max TO wt: 5100 lb.
Empty wt: 3200 lb.
Equipped useful load: 1777 lb.
Payload max fuel: 925 lb.
Range max fuel/ 75% cruise: 1040 nm/4.4 hr.
Service ceiling: 19,700 ft.
75%  cruise: 204 kt.
Vmc: 66 kt.
Stall: 66 kt.
1.3 Vso: 86 kt.
ROC: 2500 fpm.
SE ROC: 490 fpm @ 94 kt.
SE ceiling: 13,500 ft.
Min field length: 1840 ft.
Fuel cap: 852 lb.

C55
Engines: 2 x 285-hp Continental IO-520.
Fuel cap: 144 USG.

BE-E55 Baron

First built: 1966.
Engine: 2 x Continental IO-520-CB, 285 hp.
TBO: 1700 hrs.
Prop: Hartzell 2 blade, constant speed 78 in.
Seats: 4/6.
Length: 29 ft.
Height: 9.2 ft.
Wingspan: 37.8 ft.
Wing area: 199 sq.ft.
Wing aspect ratio: 7.2.
Max ramp wt: 5324 lbs.
Max take off wt: 5300 lbs.
Standard empty wt: 3291 lbs.
Max useful load: 2033 lbs.
Max landing wt: 5300 lbs.
Wing loading: 26.6 lbs/sq.ft.
Power loading: 9.3 lbs/hp.
Max useable fuel: 996 lbs.
Climb rate: 1682 fpm @ 101 kts.
Climb gradient: 999 ft/nm.
Rate of climb @ 8000 ft: 1000 fpm.
Service ceiling; 19,100 ft.
SE rate of climb: 388 fpm @ 100 kts.
SE climb gradient: 233 f/nm.
SE ceiling: 6600 ft.
Max speed: 208 kts.
Cruise @ 65% power @ 8,000ft: 190 kts.
Fuel flow @ 65% power @ 8,000ft: 161 pph.
Endurance @ 65% power @ 8,000ft: 6 hr.
Stalling speed clean: 83 kts.
Stall speed gear/flaps down: 73 kts.
Turbulent air penetration speed: 156 kts.
Retractable undercarriage.

 

beech-55-ld

 

 


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