Buona sera a tutti gli amici del bar.
Un giro offerto da me a tutti i presenti alla discussione!! Non vorrei fare discorsi impegnativi in questa sede allegra e spensierata ma, fermo restando che il bello è soggettivo e che le passioni personali non si giudicano e si rispettano, è fuori da ogni dubbio che quando si parla di auto da preferire per dei raids in fuoristrada ovunque nel mondo la scelta cade obbligatoriamente su di una Toyota!! e chi viaggia in giro per le piste sicuramente lo sa', certo c'è chi fa il giro del mondo in panda o moto-ape ma quella è un'altra storia. Esaminando i vari fattori che portano a scegliere un auto per un raid ormai la Land ai giorni nostri, purtroppo, ne esce sconfitta alla grande .
Se qualcuno vuole dimostrare il contrario si faccia avanti il tavolo per discutere fra un sorso e l'altro è open a tutti .
saluti giovanni

OK, vediamo di riassumere:
SI accusa la Land Rover di non essere stata al passo con l'evoluzione della tecnica e contemporaneamente si criticha la scelta (vecchia di 50 anni) di utilizzare alluminio per le carrozzerie!

Purtroppo per voi devo tediarvi riportando integralmente un documento pubblicato su AUTOWORLD dal quale si evince chiaramente che l'utilizzo di tale materiale rappresenta una importante evoluzione nel campo automobilitico (che i giapponesi stanno solo adesso tentando di imitare).
...ed il tutto la Land Rover lo fa di 50 anni!
...riciclato! ...e perchè no?
AUTOWORLD.COM :
Aluminium in Vehicle Construction
Tuesday, July 17, 2001 By Chips

Aluminium, the metal your can of bubbly drink is made of, has been used for cars for seven decades and the material is no stranger to automotive engineers. Even in the 1930s, Audi engineers produced a lightweight racing car using aluminium extensively while in the post-WW II period, shortage of steel inspired Land Rover to use aluminium for the body panels of its 4WD vehicles.


In later decades, various other automakers also adopted the metal but mainly for low-volume models like the Lotus Elise; GM’s EV1 electric car; the Honda NSX and also the Insight hybrid car. Land Rover was the only company to make use of it on all its models, produced in large numbers, but not for the structural members


Generally, the main aim of using aluminium has been to save weight. This has been particularly crucial for cars with electric motors where the power output is low and body weight has to be kept way down to ensure adequate performance.


Use of aluminium has been growing rapidly as its benefits have been appreciated more and more. Quite apart from the excellent resistance to rusting (ask the farmers in Cameron Highlands who have decades-old Land Rovers!) and high recyclability, aluminium is a highly desirable material to use because the weight-savings can be achieved easily without resorting to other expensive technology.


"Engineers know that aggressive weight reduction is the best way to improve fuel economy, emissions and performance. For these reasons, as well as improved corrosion resistance and recyclability, automakers are increasingly turning to lightweight, high-strength aluminium," says Dr. Richard Klimisch, Vice-president of The Aluminium Association in the USA.


And although it may be hard to believe, aluminium is actually 40% stronger than steel, even though it is lighter. On a per-kilogram basis, aluminium is twice as strong as steel. So use of aluminum in light trucks reduces the weight differential between cars and trucks, thereby reducing the risk of serious injuries passengers in the cars when two such vehicles collide. The strength of aluminium, in relation to passive safety, has been confirmed with the crash tests that the Audi A8 was subjected to in the USA, where it passed with top marks and was regarded as one of the safest cars on the market.


So why has it taken so long for aluminium to become the third most-used material in cars, this year surpassing plastics? Because the metal is much more expensive and manufacturing processes are different from the conventional ones used for making cars from steel. Audi began to focus on using it in a bigger way from the early 1990s and adapted techniques from the aerospace industry. In terms of development and production technology, the Audi Space Frame (ASF) that was developed for the R&D program had no precursors in the field of automobile manufacturing when it was introduced in the A8 in 1994.


Audi pursued the revolutionary concept, now used for the A2, for the following benefits:


1. Aluminium reduces vehicle weight; compared to steel for the same given size, aluminium is between 30% ~ 40% lighter. Thus if engine output remains the same, performance is improved and fuel consumption reduced. Moreover, lighter cars have superior handling.


2. The ASF guarantees effective occupant protection. In crash tests conducted on production A8 sedans, the ASF has proved particularly rigid and dimensionally stable. A large amount of energy is absorbed when the crumple zones deform.


3. The aluminium structure results in a body which is light in weight yet exceptionally rigid, both torsionally and flexurally. This has the highly positive effects of reducing vibration and ensuring high-precision steering.


4. Using aluminium for automobile construction helps to reduce environmental pollution. This is evident if the amount of energy consumed in the entire materials cycle and aluminium's excellent recycling properties are taken into account.


The use of recycled aluminium is ecologically sound. If a material can be recycled sensibly and economically after years of use, no unnecessary waste is produced. Aluminium can be recycled to an almost unlimited extent. Assuming the same composition, recycled (secondary) aluminium has the same qualities as the primary material. In the recycling process, the individual components of the ASF can be turned back into what they were before: extruded sections become extruded sections again, and so do cast nodular joints and panels.


At the moment, around 90% of the aluminium used in vehicles can be recycled. This has a positive effect on energy consumption, since only a fraction of the energy needed to obtain primary aluminium is required to produce secondary aluminium.


In comparable driving conditions, if the amount of energy required for producing an aluminium body is compared with that required for producing a steel body with the same function, the following pattern emerges: even if new aluminium only is used, the additional energy consumed is compensated for after around 60,000 kms, thanks to the fact that the aluminium body weighs 40% less. If around 75% secondary aluminium is used, the amount of energy consumed during body production drops below the amount used to produce a steel body. And less energy is consumed as soon as the vehicle takes to the road.


One drawback, though not a very serious one, is that the aluminium construction requires specialised techniques for repair work if it is damaged. This is due to the fact that the aluminium body uses alternative connecting techniques such as adhesives and rivets instead of welding. Audi also conducted studies into the frequency of damage to a vehicle’s structure during an accident and found it to be around 5%. If damage does occur to the ASF, specialized tools and equipment are needed for the repair procedure. Therefore Audi distributors which sell the A8 are required to have structural repair facilities centres which has specialized MIG welding machines and a Celette repair bench utilized in combination with Audi chassis alignment jigs.

...dimenticavo:
siccome la lettura è lunga e potrebbe tediarvi, pago pegno con una "giro" e per restare in tema:
ALVISEEE! Una Cola-Bacardi a tutti... e non risparmiare con il rum! Mi raccomando!

Sono daccordo con te (forse)!! Ma vallo a raccontare allo svizzero che ho incontrato a Nema(Mauritania) fermo da tre giorni con un cuscinetto del mozzo del suo td300 fuori uso comunque il meccanico locale, visto che di Defender e relativi ricambi in Mauritania come nel resto dell'Africa nemmeno a sognarli, si stava adoperando ad adattargli come depannage d'emergenza un cuscinetto Toyota !!
Comunque caro Lone, credo che tu abbia pochi argomenti a tal proposito, ma quando vuoi mi trovi sempre pronto .
Alvise!! Un succo di frutta per Lone!! ha bisogno di restare sobrio!!
saluti giovanni

Si potrebbe avere un bel caffe`?

Alvise, non credi sia ora di aprire l'argomento "Toy o Land"?

Sai che fiamme?

Caffe` per tutti?

Ciao!

Mauro

un giro di mirinda per tutti!!!
un consiglio da donne: andate a parlare di land e Toy da un'altra parte, non potete sempre monopolizzare il bar.....

...finalmente tra le strade di portapalazzo non si vedono piu' donne maghrebine col viso coperto e addirittura chiacchierano sorridenti insieme magari davanti ai bar... è un buon segno!

Come i Boy Scouts: sempre pronti!

Visto che siamo al bar...una barzellettina ogni tanto:

I vigili urbani di Napoli, per incoraggiare l'utilizzo delle cinture, hanno
deciso di dare un premio di 5.000 Euro al primo automobilista che ogni
mattina passi davanti a una pattuglia con la cintura allacciata. Il primo
giorno il premio va a una macchina che sta uscendo dal porto. I vigili la
fermano e si congratulano con l'automobilista. Uno dei vigili gli chiede
cosa pensi di fare con i soldi vinti. "Beh" dice l'automobilista" penso che
andro` a scuola guida per prendere la patente". "Non statelo a sentire"
interrompe la donna vicino a lui "sragiona sempre quando e` ubriaco". Sul
sedile posteriore un uomo che stava dormendo si sveglia, vede la scena e
grida "Lo sapevo che non saremmo passati con una macchina rubata!".
Improvvisamente, si sente un colpo dal baule, e due voci con accento
africano chiedono "E allora, siamo fuori dal porto?".

bravo!!! troppo bella....!!!!

Quando passo dal bar e nel volete qualcuna...tranquilli...è sempre pronta...