Aeronautica Umbra AUM-903 (Project)

boxkite

boxkite

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Aeronautica Umbra AUM-903 (Project)

Wikipedia (UK) says:
... and in 1968 commenced work on a design for a three-engine STOL transport aircraft designated the AUM-903. This, however, was never actually built, ...
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I tried this: https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=11&cad=rja&uact=8&ved=2ahUKEwiQ08basJjhAhVO3KQKHU4SABgQFjAKegQIBBAB&url=https%3A%2F%2Fwww.ebay.ie%2Fcsc%2FPublications%2F96838%2Fi.html%3F_sop%3D%26_ssc%3D1%26_mPrRngCbx%3D1%26Brand%3DOgden%252527s%25252F%252520Guinea%252520Gold%25252F%252520Tabs&usg=AOvVaw3fJkfWj6PIywl7gPiz6mBk, but without success.
 

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Yes my dear Boxkite,

and I know it from long time,it was mentioned in JAWA 1971-72;

https://www.secretprojects.co.uk/forum/index.php/topic,872.msg20669.html#msg20669
 
source: unknown
 

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Thanks.
 

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That project was limited by the 8-cylinder, Lycoming IO-720 engines available back during the 1960s.

In many respects, this project looks like a Cessna 208B Grand Caravan with a swinging aft fuselage. As soon as they proved their reliability, Pratt & Whitney sold PT6A engines to Cessna to power their single-engined 208 Caravan. PT6A may have started with only 550 horsepower, but later versions of Caravan - and STCs - now make up to 1,000 horsepower.
 

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