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CAC CA-15 (Kangaroo)


Fighter-Interceptor / Bomber Escort Prototype


Aviation / Aerospace

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The CAC CA-15 Kangaroo was the most advanced fighter design to come out of Australia during World War 2.



Authored By: Staff Writer | Last Edited: 6/13/2018 | Content ©www.MilitaryFactory.com
Much of Australian industry was evolved and put to the test during World War 2 (1939-1945). Its aviation sector eventually produced a handful of viable developments including the nationally-important CAC "Boomerang" by the Commonwealth Aircraft Corporation which had been established in 1936. In 1943, as the Pacific War continued to rage on near the Australian border, a new initiative was put into action involving a single-seat, single-engine monoplane fighter utilizing all-metal stressed-skin construction. Power for the aircraft was to come from the American-made Pratt & Whitney R2800-10W "Double Wasp" turbocharged radial piston engine of 2,300 horsepower output. The engine proved a monumental success during the war as it powered such famous types as the Martin B-26 "Marauder" medium bomber, the Curtiss C-46 "Commando" transport, and the Republic P-47 "Thunderbolt" fighter. Unfortunately this also meant that the engine continued to be in great demand outside of Australia.

The new endeavor was the CA-15 intended for the interceptor and bomber escort roles. CAC engineers, fresh off the success of their Boomerang program, elected for a well-streamlined and deep fuselage with the engine accordingly situated at front, the cockpit at center and a conventional single-finned tail unit at rear. The wing mainplanes were low-mounted and straight near midships and featured clipped tips. The pilot sat under a teardrop-style canopy offering excellent vision above and to the sides of the aircraft - though the design suffered as most wartime fighters did - the long nose and mainplanes obstructed much of vision towards critical quadrants about the aircraft. A "tail-dragger" retractable undercarriage was installed and a four-bladed propeller unit was fitted to the engine. The CA-15 showcased some of the form of the classic North American P-51 Mustang through its general appearance which included a ventral air scoop.

When it became apparent that the Double Wasp radial engine was not to be had in the numbers required, the decision was made to adopt an inline engine instead and this became the British Rolls-Royce Griffon 61 series liquid-cooled system. This added some complexity to the internal workings and overall operation of the aircraft. The shift in powerplant also did little to move the program along.

In August of 1945, the Empire of Japan formally capitulated and brought an end to the War in the Pacific for September. The CA-15 had still not yet flown and the massive military drawdown that followed the conflict cast a shadow on the slowly evolving indigenous Australian fighter project. Nevertheless, work on the product continued to the point that a first flight was finally had on March 4th, 1946. The aircraft featured its inline set in the nose and a streamlined spinner managed the four-bladed propeller unit. The CA-15 was a good initiative for the country and its most advanced wartime design to appear. In testing, it was able to see speeds reaching near 450 miles per hour.

On December 10th of that year, the sole working prototype suffered a failure of its undercarriage hydraulics when attempting to land at Point Cook - leaving the main legs only partially lowered. After dumping fuel, the test pilot crash landed the aircraft. The pilot survived with a few bumps and scrapes but the aircraft suffered considerable damage in the exercise. Despite the setback, CA-15 was repaired and readied to be flown again and topped diving speeds over 500 miles per hour in further flights.

While the program continued forward, albeit at a much-reduced pace in peacetime, the product was no longer in need and served mainly in a data collecting role for most of its time aloft. The global shift to jet-powered aircraft did many fighter programs such as the CA-15 in at the end of the war and in the period immediately following. With that, the only completed prototype of the CA-15 was discarded and ultimately scrapped, lost to the pages of Australian aviation history. The project was formally ended in 1950.

As finalized, the CA-15 was given a length of36.1 feet and a wingspan of 36 feet with a height nearing 14.1 feet. Empty weight was 7,540 pounds and Maximum Take-Off Weight (MTOW) reached 12,340 pounds. Officially performance numbers included a maximum speed of 448 miles per hour, a range of 1,150 miles, a service ceiling of 39,000 feet and a rate-of-climb of 4,900 feet per second.

While never officially named, the CA-15 ultimately garnered itself the nickname of "Kangaroo" in keeping with Australian aircraft naming conventions.

Proposed armament included 0.50 caliber (12.7mm) heavy machine guns, three per wing, with 250 rounds afforded per gun unit. The wings were also to receive provision for five high-explosive rockets each (ten total) and a hardpoint to carry up to 2 x 1,000 pound conventional drop bombs.


Specifications



Year:
1946
Status
Cancelled
Crew
1
[ 1 Units ] :
Commonwealth Aircraft Corporation (CAC) - Australia
National flag of Australia Australia (cancelled)
- Fighter
- Interception
- Ground Attack
- Close-Air Support (CAS)
- X-Plane / Developmental
Length:
36.09 ft (11 m)
Width:
35.99 ft (10.97 m)
Height:
14.17 ft (4.32 m)
(Showcased structural dimension values pertain to the CAC CA-15 (Kangaroo) production model)
Empty Weight:
7,562 lb (3,430 kg)
MTOW:
12,346 lb (5,600 kg)
(Diff: +4,784lb)
(Showcased weight values pertain to the CAC CA-15 (Kangaroo) production model)
1 x Rolls-Royce Griffon 61 12-cylinder inline liquid-cooled engine developing 2,035 horsepower.
(Showcased powerplant information pertains to the CAC CA-15 (Kangaroo) production model)
Max Speed:
447 mph (720 kph; 389 kts)
Service Ceiling:
38,993 feet (11,885 m; 7.38 miles)
Max Range:
1,150 miles (1,850 km; 999 nm)
Rate-of-Climb:
4,900 ft/min (1,494 m/min)
(Showcased performance values pertain to the CAC CA-15 (Kangaroo) production model; Compare this aircraft entry against any other in our database)
PROPOSED STANDARD:
6 x 0.50 caliber M2 Browning heavy machine guns in wings (three per wing).

PROPOSED OPTIONAL:
10 x High-explosive rockets (five per wing)
2 x 1,000lb conventional drop bombs (one per wing)
2 x Jettisonable fuel tanks (one per wing, assumed)
(Showcased armament details pertain to the CAC CA-15 (Kangaroo) production model)
CA-15 - Base Product Designation
"Kangaroo" - Unofficial Name
General Assessment
Firepower  
Performance  
Survivability  
Versatility  
Impact  


Values are derrived from a variety of categories related to the design, overall function, and historical influence of this aircraft in aviation history.
Overall Rating
The overall rating takes into account over 60 individual factors related to this aircraft entry. The rating is out of a possible 100.
34
Relative Maximum Speed
Hi: 500mph
Lo: 250mph
This entry's maximum listed speed (447mph).

Graph average of 375 miles-per-hour.
City-to-City Ranges
NYC
 
  LDN
LDN
 
  PAR
PAR
 
  BER
BER
 
  MSK
MSK
 
  TKY
TKY
 
  SYD
SYD
 
  LAX
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  NYC
CAC CA-15 (Kangaroo) operational range when compared to distances between major cities.
Aviation Era Span
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Showcasing era cross-over of this aircraft design.
Unit Production (1)
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
1
1

  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


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