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Author Topic: Aeronautica Umbra fighters  (Read 12435 times)

Offline raravia

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Aeronautica Umbra fighters
« on: May 06, 2006, 04:12:54 am »

Antonio

Surfin in the web i found two of the non built projects from ing. Bellomo who worked for italian Aeronautica Umbra and create these fighter projects before italy get involved in the WWII.

Both are twin engine fighters

the illustrations were not good, but it´s better than nothing.

Enjoy it

Fabián

Offline lark

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Re: Aeronautica Umbra fighters
« Reply #1 on: May 06, 2006, 08:07:35 am »
Raravia,

More about this plane in "www.airwarfareforum.com"
-choose WW II aircraft
-then put in the search bar Aeronauti Umbra MB-902

you will see...

Enjoy.

Lark

Offline Antonio

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Re: Aeronautica Umbra fighters
« Reply #2 on: May 07, 2006, 02:44:47 am »
¡Fantásticos!, gracias Fabián

Cool forum and people (I have seen Tophe is there)..I'm going to join it. Thanks Lark

Offline raravia

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Re: Aeronautica Umbra fighters
« Reply #3 on: May 07, 2006, 02:10:54 pm »

Thank you Lark, i´ve been surfin just a little on this page, and i think it´s very good.

Thanks for the link.

Antonio, i ´m glad you´ll enjoy it, although i guess you knew them.

Saludos

Fabián

Offline Antonio

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Re: Aeronautica Umbra fighters
« Reply #4 on: May 15, 2006, 12:55:43 am »
Fabián,

The Bellomo project is totally new for me. :D

Offline hesham

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Re: Aeronautica Umbra fighters
« Reply #5 on: July 10, 2011, 06:20:40 am »
Hi,


the data for Umbra MB-902.

Offline airman

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Re: Aeronautica Umbra fighters
« Reply #6 on: July 10, 2011, 07:12:49 am »
interesting ! :)
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Offline Grey Havoc

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Re: Aeronautica Umbra fighters
« Reply #7 on: July 10, 2011, 08:10:26 am »
The USAAC might have dodged yet another bullet with the destruction of the MB-902 prototype. Too late in the war to change much for Italy, but a few production machines could have proven to be a headache for allied bombers. On the other hand, given the state of Italian engine production, they might have been unable to build any production examples even if the prototype had survived and been successfully tested.
The sole imperative of a government, once instituted, is to survive.

Offline Skybolt

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Re: Aeronautica Umbra fighters
« Reply #8 on: July 10, 2011, 01:14:00 pm »
There was no prototype in Foligno... A partially completed mock-up at a maximum. And besides that, the angular transmission that was the critical part of the design had never been tested, not even built. Isotta Fraschini extensively tested (you'll see it in ISP) two different solutions for linear extension shafts, proving that the Bellomo's concept (reduce RPM at engine shaft then restore it at propeller gear) could work as designed. The alternate "angular" transmission design, the Alfa 1901 powered by an Alfa 1101 engine, used diagonal transmissions (maybe 45 degrees), with linear extension shafts. 
BTW, the wings in the drawing posted by Hesham are wrong, the aspect ratio was higher. The second illustration posted in 2006 is good.
« Last Edit: July 10, 2011, 01:16:44 pm by Skybolt »

Offline Nik

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Re: Aeronautica Umbra fighters
« Reply #9 on: July 11, 2011, 07:38:20 am »
I've read of an 'odd' engine in fuselage to super-charge the others, but putting the main engines there is certainly unorthodox !!


They certainly deserve kudos for thinking outside of the box !



I'd be concerned about cooling, but there's plenty of fuselage available...


Uh, does dropping the drive-shafts' speed then up-gearing (and reversing) just before contra-props obviate the usual 'long shaft' issues that beset 'buried' designs ??

Offline Nico

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Re: Aeronautica Umbra fighters
« Reply #10 on: July 11, 2011, 10:14:08 am »
Hi all,
I tried "www.airwarfareforum.com"but nothing appeared. Perhaps is mandatory some form of browser or to be logged?
Moreover, about the MB-902 my information probably came from the same sources of those of Skybolt. I can add that the real development of the MB.902 in its final form started only in the first days of July 1941 (the previous fighter projects from Aeronautica Umbra are AUT.18 and AUT.45, designed by eng. Felice Trojani and are completely different and unrelated to MB.902).
The formal order for two prototypes came on April 19, 1942, with serials MM.519 and MM.520. Perhaps the two protypes have to be in different version MB.902C (for Caccia) or Caccia C and MB.902A/A (Attacco/Anticarro) ground attack/tank buster but I cannot endorse that information as I cannot endorse the July 5 1941 proposal of engine the aircraft with two FIAT RA.1050 RC.58 Tifone (Daimler-Benz DB 605A-1).
Surely the development proceeded very slowly and at the armistice date (September 8, 1943) only some tools and minor parts were built and the assembly of the second prototype was never started.
I enclose a sketch published by 'Flying Review' I used some years ago as my Christmas card...
Nico

Offline Jemiba

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Re: Aeronautica Umbra fighters
« Reply #11 on: July 11, 2011, 09:39:21 pm »
I tried "www.airwarfareforum.com"but nothing appeared. Perhaps is mandatory some form of browser or to be logged?

The airwarfareforum closed, I think, at least about two years ago, you just can try to find posts there
via a webarchive like http://www.archive.org/  (although with a quick search, I wasn't successful there !  :-[  )
It takes a long time, before all mistakes are made ...

Offline hesham

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Re: Aeronautica Umbra fighters
« Reply #12 on: March 21, 2013, 06:33:29 am »
Hi all,
I tried "www.airwarfareforum.com"but nothing appeared. Perhaps is mandatory some form of browser or to be logged?
Moreover, about the MB-902 my information probably came from the same sources of those of Skybolt. I can add that the real development of the MB.902 in its final form started only in the first days of July 1941 (the previous fighter projects from Aeronautica Umbra are AUT.18 and AUT.45, designed by eng. Felice Trojani and are completely different and unrelated to MB.902).



Hi,


the Umbra AUT.45 was a twin engined observation and light bomber aircraft project,and not
a fighter.

Offline GTX

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Re: Aeronautica Umbra fighters
« Reply #13 on: March 21, 2013, 03:03:53 pm »
Certainly an attractive design.

Offline Apophenia

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Re: Aeronautica Umbra fighters
« Reply #14 on: March 21, 2013, 04:39:38 pm »
the Umbra AUT.45 was a twin engined observation and light bomber aircraft project...

Umbra AUT.45 was an April 1938 twin-engine reconnaissance project (in competition with the CANSA FC.20 and others). Power was by 2 x 840hp Fiat A.74 RC.38 with optional Fiat A.76 RC.40 radials (with suggestions that Alfa Romeo Monsone were also being considered). Development ended in April 1940. Crew of 3, Span 18.56m, 4 x 12.7mm Breda-SAFAT machineguns.

Source: Nuova Guida Agli Aeroplani di tutto il Mondo vol.IV -- which has a 3-view drawing
http://reader.ilmiolibro.kataweb.it/v/800504/Nuova_Guida_Agli_Aeroplani_di_tutto_il_Mondo_volIV#!