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ITA - ITALY
SAN PIERO A SIEVE, CIRCUITO DELLA FORTEZZA
Not to be confused with Mugello - Mugello (196x) - Mugello, Circuito Stradale - San Piero a Sieve (1967)
Description  
Location San Piero a Sieve
FI - Firenze - Toscana
Location under San Martino fortress, San Piero a Sieve
Latitude - Longitude + 43°57'45"     + 11°18'43"
43.9625     11.311944
UTM Coordinates X = 685476.662  -  Y = 4870306.245  -  Zone 32T
Aerial photo / Map (*) Aerial photo / Map (*) OpenStreetMap  -   Aerial photo / Map (*) Google Maps  -   Aerial photo / Map (*) Bing Maps  -   Aerial photo / Map (*) Flash Earth  -   Aerial photo / Map (*) Wikimapia
Altitude AMSL 248 m - 814 ft
Inauguration  
Closing  
Designer  
Sources and links (Translation) (**)
(1) Italian mail, note Mail dated February 22nd 2005 from Fr@nk (author of piedipesanti.splinder.com)
(2) English forums.autosport.com (...)Autosport.com Bulletin Board --> The Nostalgia Forum --> F3 Italia 1967, 2 races to unveil
(3) Italian Autosprint 48/1971 (page 30)Inauguration of Circuito della Fortezza
(4) Italian Autosprint 2/1972 (page 36)
(5) Italian Autosprint 6/1972 (page 31)Track sabotaged by AC Firenze?
(6) Italian Autosprint 12/1972 (page 19)Test for Tecno F.1
(7) Italian Autosprint 7/1973 (page 44)Circuit exteded, but there are some problems

(*) NOTE: a complete and detailed view of the circuit can be found (if available) on Street View by Google Maps and/or Bird's Eye and 3D views by Bing Maps for Enterprise (former Microsoft Virtual Earth): both can be reached using their own link in Aerial photo / Map cell.

(**) For on-line not-English speaking sources, click on each small flag and you open the corresponding Google Translator page with automatic translation.

Circuito della Fortezza
Description Provate proving ground, built in 1971 by Lando Baldassini. Just after start line, there is a long uphill ’S’, then a downhill 350 m long (approx.), a slight uphill, a fast right bend, uphill and than back to start/finish line. My map is drawn from an aerial photo and it doesn’t fit very well with this description. However, it’s a challenging circuit, built for learning fast driving (a school was scheduled, maybe managed by «Sangry-Là») and for having a proving gorund in that area. Besides, accelleration races, slaloms and chasing races were expected. With a car like Alfa Romeo 1750 GT, max speed should be 120-130 km/h (75-80 mph) Apart from tested listed below, I have no more info and I don’t know how long the circuit has been used.


I know only the following tests:
  • Baldassini built and tested here an experimental prototype, with plastic bodywork and two-strokes engine, 100cc approx.
  • «Sangry-Là» tested before Christmas 1971 «Gipsy», prototype, built by Guidetti from Parma: it has a modified Fiat Dino engine (but further it could be replaced by a Cosworth), Colotti 5 speeds gearbox and a chassis type McLaren. Max power, approx 250 CV at 9000 rmp, total mass 450 kg.
  • Nanni Galli tested here Tecno F.1 in March 1972
Years 1971÷1972
Direction  
Progetto Proposal NO
No longer operational YES
Car Circuit YES
Motorbike circuit YES
Type Permanent
Inauguration  
Closing  
Last update of this page April 4th 2006
Info last update  
Designer  
Distinctive points  
length (approx) 1000  m 3281  ft 0.621  mi    
Min width 9  m 30  ft       
Min width 12  m 39  ft       

Circuito della Fortezza
Description After a very promising beginning of 1972, also thanks to Tecno F.1 test, silence came back on the circuit. The only exception is the beginning of extension of the track up to 3090 m, then all activity stopped again. The reason is the competition of the rising Autodromo del Mugello (in that period still under construction), that withdrew the attention from this track. Baldassini thought to specialize his circuit for motorbikes: it would have had all requirements for being approved as international circuit (i.e. it’s longer than 3 km - 1.865 mi). At beginning of 1973 allocation should have been discussed and fund would have been used for asphalt the new section and for building all facilities. In June 1973 a motorbike national race was scheduled. Once all works were finished, the circuit should have been used also for more categories, as for examples Super Kart. I don’t know if these works have ever been done, but looking at aerial photos I don’t think so.
Years 1973
Direction  
Progetto Proposal NO
No longer operational YES
Car Circuit YES
Motorbike circuit YES
Type Permanent
Inauguration  
Closing  
Last update of this page October 21st 2005
Info last update February 1973
Designer  
Distinctive points  
length 3090  m 10138  ft 1.92  mi   (7)

San Piero a Sieve, Circuito della Fortezza

San Piero a Sieve, Circuito della Fortezza


Updates
Date Track layout Years Description by Map by Thanks to Note
November 26th 2005     Guido de Carli     Update Description
October 21st 2005     Guido de Carli     Update Description
August 18th 2005     Guido de Carli     Update Description
March 6th 2005     Guido de Carli     Update Description
February 23rd 2005     Guido de Carli Guido de Carli Fr@nk New Description with map
Not all eventual updates issued in last years are already visible in this list
 
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