Hindustan Trainer HTT-40

Discussion in 'Indian Air Force' started by Ganesh2691, Nov 8, 2012.

  1. Prashant12

    Prashant12 Senior Member Senior Member

    Joined:
    Aug 9, 2014
    Messages:
    1,818
    Likes Received:
    8,187
    Location:
    Mumbai
  2. Rushil51

    Rushil51 Regular Member

    Joined:
    Jul 13, 2014
    Messages:
    471
    Likes Received:
    304
    Location:
    Castelia City



    00000000000000000000000000000000000000000000000000000000000000000
     
    Shashank Sharma likes this.
  3. Shadow

    Shadow Regular Member

    Joined:
    Oct 5, 2013
    Messages:
    361
    Likes Received:
    581
    Location:
    India
    Why are prototype aircrafts always painted in yellow?o_O
     
    Shashank Sharma and porky_kicker like this.
  4. Rushil51

    Rushil51 Regular Member

    Joined:
    Jul 13, 2014
    Messages:
    471
    Likes Received:
    304
    Location:
    Castelia City

    This is not our first prop plane. We have HAL Krishak, HAL Pushpak etc. Well there is nothing "new" about it expect that it is a modern BTA which will serve alongside Pilatus. How ever it is still an important development.

    And there was talk sometime back that it may have an armed version similar too Super Tucano.
     
    Screambowl likes this.
  5. porky_kicker

    porky_kicker Regular Member

    Joined:
    Apr 8, 2016
    Messages:
    981
    Likes Received:
    3,231
    primer coating
    very basic yellow chromated primer

    maybe Zinc Chromate Yellow

    Zinc Chromate is a corrosion resistant agent that is added to certain coatings. chromate finishes/coatings including Zinc Chromate provide superior corrosion resistance. Additionally, Zinc Chromate is highly toxic thus protecting the surface from proliferation of organic matter.
    It provides a base for the top coat or paint, a barrier between harmful elements during maintenance/flight testing period and in atmosphere to prevent surface corrosion of base metal.it prevent corrosion of base metal eg Aluminum by giving a cathodic protection. Zinc is anodic to Aluminum thus susceptible to corrosion and hence save aircraft structure from galvanic corrosion.
     
  6. tejas warrior

    tejas warrior Senior Member Senior Member

    Joined:
    Jan 4, 2015
    Messages:
    1,261
    Likes Received:
    3,664
    Location:
    India
  7. tejas warrior

    tejas warrior Senior Member Senior Member

    Joined:
    Jan 4, 2015
    Messages:
    1,261
    Likes Received:
    3,664
    Location:
    India
    Double post, @Moderators - please delete one.
     
  8. Abhi9

    Abhi9 Regular Member

    Joined:
    Aug 25, 2012
    Messages:
    559
    Likes Received:
    1,545
    HTT 40 looking awesome pic credit Ananth Krishnan

    [​IMG]
     
  9. Abhi9

    Abhi9 Regular Member

    Joined:
    Aug 25, 2012
    Messages:
    559
    Likes Received:
    1,545
    credits matrabhumi..............................
    [​IMG]
     
  10. indiatester

    indiatester Senior Member Senior Member

    Joined:
    Jul 4, 2013
    Messages:
    1,438
    Likes Received:
    2,281
    Location:
    Bangalore
    I saw the HTT40 fly by an hour back. It flew at a fairly low altitude. Unfortunately it few out of range before I could click a picture.
    It was bigger than I had thought (bigger than a bus IMO) and looked nice!
     
  11. Shadow

    Shadow Regular Member

    Joined:
    Oct 5, 2013
    Messages:
    361
    Likes Received:
    581
    Location:
    India
    ClIhwrIVEAAh6SN.jpg I am really proud of our Defense Minister.:india:
     
  12. Shadow

    Shadow Regular Member

    Joined:
    Oct 5, 2013
    Messages:
    361
    Likes Received:
    581
    Location:
    India
    HTT 40 Team.

    ClIh-JtUgAAO7II.jpg ClIh9c-UkAAN34T.jpg ClIh9NmUsAM_jI2.jpg
     
  13. HariPrasad-1

    HariPrasad-1 Senior Member Senior Member

    Joined:
    Jan 7, 2016
    Messages:
    3,611
    Likes Received:
    4,262
    Location:
    Gujarat
    It is primer. If there is any crack in body, it will become immoderately visible. That is why.
     
  14. Shadow

    Shadow Regular Member

    Joined:
    Oct 5, 2013
    Messages:
    361
    Likes Received:
    581
    Location:
    India
    ClIRQyvUkAATbgZ.jpg

    ................................
     
  15. Saichand K

    Saichand K Regular Member

    Joined:
    Sep 9, 2015
    Messages:
    154
    Likes Received:
    151
    Actually, they will be painted that way only for metallic parts of the frame. If we see Tejas NP-2,3 they are not completely yellow. The yellow primer coating is a special zinc chromate coating on metal parts to prevent corrosion. Since HTT-40 is a all metal air-frame it is completely coated with yellow zinc chromate. However, I would like to see composites being used in HTT-40 prototypes as well.
     
  16. Neeraj Mathur

    Neeraj Mathur Regular Member

    Joined:
    Feb 1, 2012
    Messages:
    480
    Likes Received:
    342
    Shashank Sharma likes this.
  17. abingdonboy

    abingdonboy Senior Member Senior Member

    Joined:
    Sep 13, 2010
    Messages:
    2,875
    Likes Received:
    5,179
    The numbers are waaaay off here. Only 75 PC-7s were ordered. The IAF still requires 120++ BTT that the HTT-40 will fit the bill and the IN will look to induct at least 40 for themselves.
     
  18. abingdonboy

    abingdonboy Senior Member Senior Member

    Joined:
    Sep 13, 2010
    Messages:
    2,875
    Likes Received:
    5,179
    The project was only cleared a few years ago. It wasn't a question of struggling, the know how is there but as always it was mindset and bureaucracy that was holding them back.
     
  19. sasum

    sasum Atheist but not Communists. Senior Member

    Joined:
    Jan 14, 2016
    Messages:
    1,434
    Likes Received:
    749
    Location:
    Delhi, India
    Actually, the reason is more mundane like why school-buses are painted yellow..obviously for greater visibility in low light. Anti-corrosion properties of aircraft body are desirable for trainer, fighter, passenger, cargo aircrafts alike. Take for example, F-16, block-50. This is made of 80% aluminium, but painted dark gray. This has not made F-16 airframe any fragile. It has around 8000 hrs. (largest) of life expectancy, compared to Tejas's 3000 hrs., with all composite materials. The yellow painting tradition was started by RAF, but it is no more followed around the world. For more, read the article below:
    Training Aircraft Colour Schemes
    RAF training aircraft have sported a number of colour schemes over the years. The basic idea was to improve visibility of training aircraft and therefore reduce the number of potential accidents. Some schemes have proved more successful than others. Below are some of the main schemes used by the RAF.

    [​IMG]
    A bright yellow colour scheme was in wide-spread use during the inter-war period (1918-1939). It was believed that yellow would make the aircraft stand out but in practice this was not always the case.

    [​IMG]
    An overall silver finish with yellow bands was the paint scheme favoured in the late 1950s/early 1960s. The small yellow bands were not always clearly visible, however.

    [​IMG]
    In the mid-Sixties a grey scheme with "dayglo" orange was introduced. The fluorescent orange was very visible but the paint faded quickly. The paint was replaced with sticky-backed vinyl but this proved quite expensive.

    [​IMG]
    In the early 1970s a grey, white and red paint scheme was adopted and applied to all training aircraft.

    [​IMG]
    Today all training aircraft are painted gloss black. In trials this proved to be the most visible colour against all daytime skies.
     
    Shashank Sharma likes this.
  20. Saichand K

    Saichand K Regular Member

    Joined:
    Sep 9, 2015
    Messages:
    154
    Likes Received:
    151
    Prototypes or any unpainted aircraft is coated with zinc chromate primer to prevent corrosion. Paint job is done later over these primer coating. It has nothing to do with trainer aircraft alone. It is applicable for all planes. Even prototypes of Tejas has this.
     
    Shashank Sharma and porky_kicker like this.

Share This Page