1.     Mi trovi su: Homepage #4342858
    Durante le prime missioni spaziali gli astronauti della Nasa scoprirono che le penne a sfera non funzionavano in assenza di gravità. Per far fronte al problema, agli scienziati dell'agenzia spaziale americana sono serviti dieci anni di ricerche e 12 miliardi di dollari. Il risultato è stato una penna che scrive nello spazio, a testa in giù, nell'acqua, su quasi ogni superficie compreso il vetro e a temperature che vanno dai 100 sotto zero ai 200 gradi centigradi. I russi hanno usato delle matite. :cool:
    "Xchè? Xchèèè? 3-1, 3-2, 3-3 !!!"
  2. Staff ScudettoWeb  
        Mi trovi su: Homepage #4342859
    Mica vero...

    NASA never asked Paul C. Fisher to produce a pen. When the astronauts began to fly, like the Russians, they used pencils, but the leads sometimes broke and became a hazard by floating in the [capsule's] atmosphere where there was no gravity. They could float into an eye or nose or cause a short in an electrical device. In addition, both the lead and the wood of the pencil could burn rapidly in the pure oxygen atmosphere. Paul Fisher realized the astronauts needed a safer and more dependable writing instrument, so in July 1965 he developed the pressurized ball pen, with its ink enclosed in a sealed, pressurized ink cartridge. Fisher sent the first samples to Dr. Robert Gilruth, Director of the Houston Space Center. The pens were all metal except for the ink, which had a flash point above 200°C. The sample Space Pens were thoroughly tested by NASA. They passed all the tests and have been used ever since on all manned space flights, American and Russian. All research and developement costs were paid by Paul Fisher. No development costs have ever been charged to the government.

    Però io ho la matita russa sulla cui scatola è scritto l'aneddoto. Ho ovviamente anche la penna spaziale. :D
  3.     Mi trovi su: Homepage #4342861
    Originally posted by ScudettoWeb
    Mica vero...

    NASA never asked Paul C. Fisher to produce a pen. When the astronauts began to fly, like the Russians, they used pencils, but the leads sometimes broke and became a hazard by floating in the [capsule's] atmosphere where there was no gravity. They could float into an eye or nose or cause a short in an electrical device. In addition, both the lead and the wood of the pencil could burn rapidly in the pure oxygen atmosphere. Paul Fisher realized the astronauts needed a safer and more dependable writing instrument, so in July 1965 he developed the pressurized ball pen, with its ink enclosed in a sealed, pressurized ink cartridge. Fisher sent the first samples to Dr. Robert Gilruth, Director of the Houston Space Center. The pens were all metal except for the ink, which had a flash point above 200°C. The sample Space Pens were thoroughly tested by NASA. They passed all the tests and have been used ever since on all manned space flights, American and Russian. All research and developement costs were paid by Paul Fisher. No development costs have ever been charged to the government.

    Però io ho la matita russa sulla cui scatola è scritto l'aneddoto. Ho ovviamente anche la penna spaziale. :D


    quella è la prima cosa che mi è venuta in mente: perchè non fare una penna con inchiostro sotto pressione ? ovviamente non pensavo ai materiali ed ai costi ma mi è venuta subito in mente

  Americani....

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