Isotta-Fraschini Asso - Aircraft of World War II

red admiral · 04-09-2006, 03:40 PM

Hello,

I was wondering if anyone had photographs/drawings or details of the Isotta-Fraschini Asso 1000 engine. It was developed during the 1920s and 30s and eventually produced about 2300ps from 57l in the marinised version.

Thanks

Dogwalker · 04-10-2006, 09:44 AM

Bore 150 mm, stroke 180 mm, don't know the weight, but it's probably around 800 kg or something less.

I don't have good photos,
In these pictures the engine is in the background

And here is mounted.

photos www.ottocubano.com

the structure il almost identical to that of the Asso 750, that you can find here: http://www.enginehistory.org/vicenzi.htm

red admiral · 04-10-2006, 01:14 PM

Grazie.

I'm thinking less than 800kg weight considering the take-off weights of the M.67

Dogwalker · 04-11-2006, 08:51 AM

Some more informations.
The Asso 1000 and the Asso 750 had the same overall dimensions and the same basement. Infact the engine of the M67, now usually called "Asso 1000", at that time was called Asso 750-M (meaning a special racing version of the Asso 750 with bigger displacement), and subsequently became the Asso 1000 with the adding of the reductor and of the centrifugal single-stage supercharger (both visible in the first and second pictures above).
To avoid the backfires problems of the Fiat AS-5 / AS-6 (caused by the too long carburetors' duct more than by the 87 octane fuel), the more powerful versions of the Asso 1000 (and those of the 750 too) were fitted with the 6 carburetors, one every three cylindres, between the cylindres' bank with very short ducts.
The fuel consumption of the Isotta Fraschini W18 family was of 200-215gr/hp-h (it depends of the carburetors' type).

Dogwalker · 04-15-2006, 05:07 AM

Finally.
This is the Isotta Fraschini Asso 1000 showed at the Vigna di Valle Museum (the normal version with external carburetors).

italian roamer · 03-13-2008, 08:48 AM

Hi, all of you! I just wanted to make you knaw that the sons of Isotta Fraschini Asso series is still in production, here in Italy, and is a marine fast diesel engine, three- rowed and flywheelless, named CRM 18 W .Best wishes and, if you want to know more, here I am

Trautloft · 03-13-2008, 06:32 PM

wonderful pics, thanks

FabioRAF · 12-27-2008, 07:05 PM

Hi, these are my friends:
YouTube - Motore Isotta Fraschini asso W18

YouTube - Motore Isotta Fraschini Asso 1000

Ciao
Fabio

04-09-2006, 03:40 PM	#1
red admiral Senior Member Join Date: Mar 2005 Posts: 374	Isotta-Fraschini Asso Hello, I was wondering if anyone had photographs/drawings or details of the Isotta-Fraschini Asso 1000 engine. It was developed during the 1920s and 30s and eventually produced about 2300ps from 57l in the marinised version. Thanks

04-10-2006, 09:44 AM	#2
Dogwalker Senior Member Join Date: Dec 2005 Location: Manziana Field, near Rome Posts: 260	Bore 150 mm, stroke 180 mm, don't know the weight, but it's probably around 800 kg or something less. I don't have good photos, In these pictures the engine is in the background And here is mounted. photos www.ottocubano.com the structure il almost identical to that of the Asso 750, that you can find here: http://www.enginehistory.org/vicenzi.htm __________________

04-11-2006, 08:51 AM	#4
Dogwalker Senior Member Join Date: Dec 2005 Location: Manziana Field, near Rome Posts: 260	Some more informations. The Asso 1000 and the Asso 750 had the same overall dimensions and the same basement. Infact the engine of the M67, now usually called "Asso 1000", at that time was called Asso 750-M (meaning a special racing version of the Asso 750 with bigger displacement), and subsequently became the Asso 1000 with the adding of the reductor and of the centrifugal single-stage supercharger (both visible in the first and second pictures above). To avoid the backfires problems of the Fiat AS-5 / AS-6 (caused by the too long carburetors' duct more than by the 87 octane fuel), the more powerful versions of the Asso 1000 (and those of the 750 too) were fitted with the 6 carburetors, one every three cylindres, between the cylindres' bank with very short ducts. The fuel consumption of the Isotta Fraschini W18 family was of 200-215gr/hp-h (it depends of the carburetors' type). __________________ Last edited by Dogwalker; 04-11-2006 at 10:50 AM.

04-15-2006, 05:07 AM	#5
Dogwalker Senior Member Join Date: Dec 2005 Location: Manziana Field, near Rome Posts: 260	Finally. This is the Isotta Fraschini Asso 1000 showed at the Vigna di Valle Museum (the normal version with external carburetors). __________________

03-13-2008, 06:32 PM	#7
Trautloft Member Join Date: Jan 2007 Location: Vienna,Austria Posts: 92	wonderful pics, thanks __________________ The only thing necessary for evil to flourish is for good men to do nothing

04-10-2006, 01:14 PM	#3
red admiral Senior Member Join Date: Mar 2005 Posts: 374	Grazie. I'm thinking less than 800kg weight considering the take-off weights of the M.67

03-13-2008, 08:48 AM	#6
italian roamer Junior Member Join Date: Mar 2008 Posts: 1	Hi, all of you! I just wanted to make you knaw that the sons of Isotta Fraschini Asso series is still in production, here in Italy, and is a marine fast diesel engine, three- rowed and flywheelless, named CRM 18 W .Best wishes and, if you want to know more, here I am

12-27-2008, 07:05 PM	#8
FabioRAF Senior Member Join Date: Aug 2005 Location: Italy Posts: 101	Hi, these are my friends: YouTube - Motore Isotta Fraschini asso W18 YouTube - Motore Isotta Fraschini Asso 1000 Ciao Fabio

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