Power & Performance

PT6A-67R

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Essential to the performance of any aircraft is its power plant. The BT-67 is superbly equipped in this respect with the PT6A-67R Turboprop engines from Pratt & Whitney Canada.  The versatility and proven performance of the PT6A makes it the engine of choice for demanding, high-cycle/high-power applications.   The numbers speak for themselves:  the PT6A engine currently power aircraft in service with over 7,100 operators in more than 180 countries and having accumulated over 400+ million flying hours.

The novel PT6A configuration has proven to be a key attribute to its success: its rearward, reverse flow inlet and forward facing turbine section providing fast maintenance turn-around through on-wing hot section refurbishment.  The PT6A is a two-shaft engine with a multi-stage compressor driven by a single-state compressor turbine and an independent shaft coupling the power turbine to the propeller through an epicyclic concentric reduction gearbox. 

Inspections

• Daily inspections - 5 minutes (visual)
• 100-hours inspection - 2 hours
• Hot-section inspection - 10 hours
• Engine change - 20 hours
• Quick engine change - 14 hours (built-up engine available)
• Unscheduled maintenance - 2 hrs/100 flying hrs

Engine Run-Up and Performance:

• Check (stabilized) - 20 minutes

Accessories Replacement:

• Ignition box - 15 minutes
• Propeller control - 25 minutes

Engine Operating Limits:

• Take off (5 min) 1424 shaft H.P. to 99°F (37.2°C)
• Take off (5 min) (ALT.) 1281 shaft H.P. to 91°F (32.8°C)
• Max continuous 1220 shaft H.P. to 119°F (48.3°C)
• Propeller speed - 1700 rpm at take off, 1200-1700 rpm at cruise
• Dry weight - 515 pounds

Reliability - PT6A-67R:

• Time between overhauls - 6,000 hours initial, with increases based on operator experience
• Basic inflight shut-down rate - one per 500,000 hours
• Basic unplanned removal rate - one per 45,000 hours
• Less investment in spares

Performance

Engines
​

Propellers

Interior Dimensions
Width (at floor)
Height
​Length

​
​Volume


Weight
Maximum Take-Off Weight
Cargo Basic-
Operating Weight
Maximum Useful Load

Maximum Fuel Capacity
Standard
Long Range Tanks

Cruise Speed
Maximum Cruise
Standard Cruise
Low

Fuel Flow
Maximum Cruise
Standard Cruise
​Low

Range (Standard Cruise- 45min Reserve)
Standard Fuel
Long Range Fuel
Single Engine Ceiling

BT-67

Pratt & Whitney PT6A-67R
1424 SHP

Hartzell 5 Blade Aluminum

​7 feet
6 feet, 6 inches
42 feet, 2 inches


​1225 cubic feet



30,000 lbs

16,000 lbs
​14,000 lbs

772 Gallons (5,172 Ibs)
​1,542 Gallons (10,332 lbs)


215 Knotts (95% Torque)
205 Knotts (90% Torque)
174 Knotts (70% Torque)

152 Gallons/Hour
145 Gallons/Hour
122 Gallons/Hour


950 Nautical Miles (80% Torque)
1,860 Nautical Miles (80% Torque)
14,000 ft @ 27,000 lbs

Piston DC3

Pratt & Whitney R-1830
1200 HP

HSD 3 Blade 138"

​7 feet
6 feet, 6 inches
33 feet, 10 inches


​905 cubic feet



26,900 lbs

17,815 lbs
​9,085 lbs

800 Gallons, (5,359 lbs)
​N/A


173 Knotts (700 HP)
160 Knotts (600 HP)
N/A

119 Gallons/Hour
100 Gallons/Hour
​N/A


1,160 Nautical Miles
N/A
9,000 ft @ 26,200 lbs