20th century

  1. cluttonfred

    Concrete submarines

    I am sure that many remember this Popular Mechanics article or one of the many like it back then on a rumoured type of Russian concrete sub with 200 mph Shkval rocket torpedoes: Concrete Submarines Cheap and deadly, these stealthy boats could shift the balance of naval power. December 1998...
    • cluttonfred
    • Thread
    • 20th century 21st century cold war concrete ships ferro-concrete ferrocement interwar period post-cold war
    • Replies: 31
    • Forum: Secret Naval Projects
  2. quellish

    "Lockheed" Penetrating High Altitude Endurance (PHAE)

    In 2006 Nick Cook published an article in Janes, etc. describing a Lockheed project called Penetrating High Altitude Endurance (PHAE). This was described as a HALE UAV much like Polecat, Tier 3, Tier 3-, etc. etc. etc. Source: http://www.janes.com/defence/news/idr/idr060321_1_n.shtml Here's...
    • quellish
    • Thread
    • 20th century 21st century cold war high altitude long endurance post-cold war remotely piloted vehicle united states united states air force unmanned air vehicle war on terror
    • Replies: 31
    • Forum: Secret Postwar Aircraft Projects
  3. Triton

    Non-monohull forms (SWATH, catamarans, tri-marans)

    Many years ago I read about SWATH being the ideal hull form for future naval ships because of their superior seakeeping ability to monohulls. There stability made them ideal for carriers according to an article I read in Proceedings of the American Naval Institute. We breifly saw concept art...
  4. E

    Italian Never Build from 1975 to today

    A collection of Italian Never build project for Marina Militare Italiana (MMI) and export customer. I can offer CV, Cruiser, Frigate, Corvette, FAC and PHM
    • enrr
    • Thread
    • 20th century 21st century cold war marina militare post-cold war
    • Replies: 38
    • Forum: Secret Naval Projects
  5. TinWing

    Air Defense Ship (ADS)/Indigenous Aircraft Carrier (IAC)/Vikrant-class Carrier

    Shortly after the recommissioning of the ex-Hermes as the the INS Viraat in 1987, there were reports from India of long term plans for a 4 carrier fleet,with two new construction hulls and both ex-Hermes/Viraat and ex-Leviathan/Vikrant being retained in service until the late 1990s. A contract...
    • TinWing
    • Thread
    • 2000s 2010s 2020s 20th century 21st century cold war indian navy late 1990s post-cold war republic of india
    • Replies: 94
    • Forum: Secret Naval Projects
  6. hesham

    Ducted Fan Aircraft

    Hi, I know many ducted fan aircraft and projects were designed,the Jethawk II project and Marvel aircraft. http://massflow.archivale.com/
  7. airman

    Double-Barreled Vehicles

    starting from Mammoth tank on game Command and Conquer...... there some project of tank that have inspired this type of tank ?
    • airman
    • Thread
    • 20th century 21st century cold war post-cold war world war ii
    • Replies: 37
    • Forum: Secret Army Projects
  8. P

    Lighter-than-air and hybrid airship concepts

    When was the technology available for the introduction of SkyCats should a demand for their capability arise earlier?
    • PMN1
    • Thread
    • 20th century 21st century aerostat airships buoyant heavy-lift systems cold war lighter than air lta nuclear powered aircraft post-cold war
    • Replies: 123
    • Forum: Secret Postwar Aircraft Projects
  9. JAZZ

    SES concepts 1990's

    A number of SES concpts were proposed in the 1990's - France built a demonstrator, so did Germany, and of course Norway put a minecounter measures boat and FAC into production and sweden developed an experimental stealth SES.
    • JAZZ
    • Thread
    • 1990s 20th century 21st century cold war post-cold war surface effect ship
    • Replies: 15
    • Forum: Secret Naval Projects
  10. Matej

    Luigi Colani's improbable designs

    I forgot Colani designs. So here they are: 1. Cygnus - was projected gigantic passanger plane for soviet airlines Aeroflot from 80s. It was designed for extreme climatic and geographic conditions. It was powered by two bolt - like ducted fans. 2. This is hypersonic Mach 5 passanger plane from...
    • Matej
    • Thread
    • 20th century cold war early 21st century federal republic of germany late 20th century lutz colani post-cold war ussr west germany
    • Replies: 62
    • Forum: Secret Postwar Aircraft Projects
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