Credit
Ken H / @chippyho · CC BY-SA 2.0 · Resized · CC BY-SA 2.0 · Source ↗ · Modified
FORCETALLY
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At a glance
Measured figures
Length
Single source139 ft 11 in (42.65 m)[source]
SR20-G3 · Length
Single sourceConfiguration
| Specification | Boeing WC-135 Constant Phoenix | Cirrus SR20 |
|---|---|---|
| Type | Atmosphere testing related to nuclear incidents[source] | Light aircraft[source] |
| Manufacturer | Boeing Military Airplanes Division[source] | Cirrus Aircraft[source] |
| Status | 3 aircraft in service (WC-135R)[source] | — |
| Primary user | United States Air Force[source] | — |
| Number built | 14 (10 converted C-135B, one converted EC-135C, three converted KC-135R) |
26 ft 0 in (7.92 m)[source]
Range
Single source4,000 mi (6,400 km, 3,500 nmi)[source]
SR20-G3 · 1 × Continental IO-360-ES six cylinder, horizontally-opposed piston aircraft engine
Single source1 × Continental IO-360-ES six cylinder, horizontally-opposed piston aircraft engine , 200 hp (150 kW)[source]
4 × Pratt & Whitney TF33-P-9 (WC-135C) / Pratt & Whitney TF33-P-5 (WC-135W) turbofan engines thrust each
Single source4 × Pratt & Whitney TF33-P-9 (WC-135C) / Pratt & Whitney TF33-P-5 (WC-135W) turbofan engines, 16,050 lbf (71.4 kN) thrust each[source]
Wing area
Single source2,433 sq ft (226.0 m 2 )[source]
SR20-G3 · 828 ft/min (
Single source828 ft/min (4.21 m/s)[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
2,084 (through 2025)[source] |
| Introduction date | December 1965[source] | — |
|---|
| Developed from | Boeing C-135 Stratolifter[source] | — |
|---|
| Variant | Boeing OC-135B Open Skies[source] | — |
|---|
| Airfoil | root: BAC 310/311/312; tip: BAC 313[source] | — |
|---|
| Wing loading | 123.5 lb/sq ft (603 kg/m 2 )[source] | — |
|---|
| Thrust/weight | 0.21[source] | — |
|---|
| Country of origin | USA[source]Country/countries explicitly given in the equipment row Origin column; not the country operating the row. WC-135R Constant Phoenix | — |
|---|
| Manufactured | — | 1999–present[source] |
|---|
| First flight | — | 21 March 1995[source] |
|---|
| Developed into | — | Cirrus SR22[source] |
|---|
| Capacity | — | 3 passengers (4 using 60/40 flex seating in post-2012 models)[source] |
|---|
| Propellers | — | 3-bladed[source] |
|---|
| Stall speed | — | 56 kn (64 mph, 104 km/h) CAS[source] |
|---|
| National origin | — | United States[source] |
|---|