Caproni Ca.216

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Caproni Ca.216


While refreshing the Caproni designation lists, I came across my first mention of a Caproni Ca.216. At first, I assumed this to be a wartime Japanese publication but Google Translate revealed to be from Japan Aviation Magazine of a date I can't be sure of. [1] The Ca.216 entry is on page 780. At any rate, the original source is listed as Interavia 734, 1940/11/5, 5/6 (presumably meaning pages 5 and 6).

A tiny 3-view drawing of the Ca.216 is reproduced, showing an airliner with a superficially-similar appearance to the de Havilland DH.95 Flamingo ... but rather smaller and powered by Isotta-Fraschini Delta R.C.35-IS V-12 engines. Compared with the the DH.95, the Caproni design was more than 1,000 kg lighter but carried only 8 passengers and a crew of 2 (vs. 17 passengers and a crew of 3 for the de Havilland airliner). That makes the Caproni seem a bit heavy but it was of wooden construction while the DH.95 was metal. In any case, with its limited seating, the Caproni Ca.216 is probably best described as a feederliner.

A set of specifications is given for the Ca.216 (a cleaned-up Google Translate version of which is reproduced below). For comparison, DH.95 dimensions were: Span 21.34 m; wing area 60.50 m², and length 15.73 m. DH.95 weights were: Empty 5,137 kg, Loaded 7,983 kg, Payload 2,846 kg. However, with its 930 hp Bristol Perseus XVI radials, the de Havilland airliner had 460 additional horsepower at its disposal. Another major difference was that the DH.95 was a more conventional tail-dragger whereas the Ca.216 was to have a retractable tricycle undercarriage.

As to accuracy, other Caproni aircraft are shown in the same section - the Ca.311 and Ca.602. Both descriptions are attributed to Interavia with a quite accurate 5-view drawing of the Ca.311 and two photos of the Ca.602 shown. Not definitive by any means, but it suggests that the Interavia description of the Ca.216 project might also be accurate.

So the questions are:

- Does anyone have any more on this Ca.216 (or other Caproni Taliedo Ca.2xx civilian projects)?

- Are any Japanese-speaking forum members willing to check the machine-translation from this pdf?

- Do any forum members have access to the original article in Interavia 734?

____________________________

Google Translate

Japan Aviation Magazine July 1st, 2004 8th 75th

(7511) Caproni Ca.216

Type - small transport aircraft; shoulder-mounted cantilever-winged land-based aircraft; crew 3, passenger 8; wooden structure; tricycle wheel retractable undercarriage; Isotta · Fraskini "Delta" (Isotta-Fraschini "Delta") R.C. 351. S-type [ie: R.C.35-IS] air-cooled inverted V-12 (with machine gun) [2] engines (Take-off output: 700 horsepower at 2,400 r.p.m., Normal output: 700 horsepower at 3,500 m at 2,400 r.p.m., Maximum output: 750 horsepower at 2,600 r.p.m.) x 2; two-blade variable-pitch propeller. (Kitagawa) [3]

[? ?] Wingpan 16.9 m, overall length 15.1 m, overall height 3.3 m, wing area 40.0 m², Weight 4,100 kg, Load 1,600 kg, Total Weight 5,700 kg, wing load 142.0 kg/mm², horsepower load 2.27 kg/wing, wing 37.5 horsepower/mm².

[Performance] Maximum Speed (at 4,000 m) 418km/h, Cruising Speed 350km/h, Service Ceiling 9,000 m.

[Source] Interavia 734: 1940/11/5; 5/6.
____________________________

[1] The date 01 July 2004 is given twice ... but this might be the creation date of the pdf. There is also a garbled "8th 75th" which could mean Vol.8, No.75 or perhaps refer to an August 1975 edition.

[2] The "(with machine gun)" on the Delta engine may be an artifact of machine translation ... although the Ca.311 is correctly noted to be machine gun-armed. So, there's a chance that the Ca.216 was meant to be both a feederline and a Coloniale utility transport aircraft.

[3] I'm not sure what the parenthetical "Kitagawa" refers to. It is a family name, of course, so may just credit a magazine contributor. Contempory references could be to then-Col. Kiyomi Kitagawa of the Army Aviation School ... but that would require this entry to be a reprint of information compiled for the IJAAF c.1940.
 

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Great find my dear Apophenia,

but why the link don't open ?.
 
Thanks hesham.

I'm not sure what the problem is with the link. I'm getting 'Server Not Found' but I can still download the pdf with no problem through a Google search :eek:

Try typing "777 [7511] Caproni Ca. 216 (伊)" into Google ... the sole search result should be that J-STAGE pdf.
 
In Mallams auction site I retrieved two factory drawings of Caproni Ca.216 dated respectively July 16, 1940 and September 11,1940, that you can find here attached.
Technical data are listed on drawings.
Regards
 

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... A tiny 3-view drawing of the Ca.216 is reproduced, showing an airliner with a superficially-similar appearance to the de Havilland DH.95 Flamingo ... but rather smaller and powered by Isotta-Fraschini Delta R.C.35-IS V-12 engines. ....

(7511) Caproni Ca.216

Type - small transport aircraft; ... Isotta · Fraskini "Delta" (Isotta-Fraschini "Delta") R.C. 351. S-type [ie: R.C.35-IS] air-cooled inverted V-12 ... [2] engines (Take-off output: 700 horsepower at 2,400 r.p.m., Normal output: 700 horsepower at 3,500 m at 2,400 r.p.m., Maximum output: 750 horsepower at 2,600 r.p.m.) x 2; two-blade variable-pitch propeller. ...
How was Isotta-Fraskini able to pump 700 horsepower out of that engine when most other companies struggled to produce half that horsepower from similar in-line, air-cooled engines?

Air-cooled Vs
Alpha Romeo 122 displacement 1,135cc, 493 hp.
Argus Ar 410, 729.2cc, 459 hp.
deHavilland Gypsy 12 (aka. Gypsy King) 1121cc, 425 hp.
Issota-Fraskini Delta RC 35S displacement 26.7 liters or 1,630 cubic inches, 700 hp.
Ranger V770, 773cc, 520 hp.
Walter Sagitta I-MR 1,121cc, 600 hp.

Liquid-cooled Vs
Allison V-1710, 1,000 to 2,000 hp. depending upon the super-charger
RR Merlin displacement 1,649 cc, 1,000 to 2,000 hp. with sophisticated super-chargers.
 
Well, most of the other engine types that you've listed were not intended to be high-performance types - particularly the DH Gipsy Twelve (were reliability was the key concern). And, as your specs show, the Isotta Fraschini Delta had a somewhat larger displacement than those other IV-12s - IF's 19.1 L Gamma being a closer match for the rival Walter Sagitta (of which the Alfa Romeo 122 was an Italian licence-built variant).

When compared to liquid-cooled V-12s of their time, the Isotta Fraschini air-cooled IV-12s ran hotter and at lower rpms. The 19.1 L Gamma could be compared with the roughly contemporary 19.7 L Junkers Jumo 210 - which, for take-off, produced 680 hp @ 2,700 rpm for ... compared with the Gamma's 550 hp @ 2200 rpm.

You compared the Delta with the Merlin. For comparison, the full-production Delta produced 770 hp @ 2,600 rpm for take off while the Merlin III produced 880 hp @ 3,000 rpm. Neither of the Isotta Fraschini engine types were ever considered as reliable as the comparable Jumo 210 or Merlin. Maybe that was down to contemporary Italian metallurgy or manufacturing standards? Or maybe, at the time, a liquid-cooling was simply a better bet for high-performance inline engines?
 

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