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Serkan Sen

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Everything posted by Serkan Sen

  1. Serkan Sen
    The front upper half is now almost ready: The A-12 Oxcart will look like this: And M-21 will look like as follows: The planform view of single and double seater versions: The A-12B modification will be done after duplicating the front fuselage upper half. Serkan
  2. Serkan Sen
    You are a lucky man!.. Serkan
  3. Serkan Sen
    I am afraid that you won't get out of box what you want to have! Neither the bird nor the chick will be as expected (or dreamed)... Serkan
  4. Serkan Sen
    This will be the next one in my list 🙂 The whitebird not the lady 😁 Serkan
  5. Serkan Sen
    Thanks for your kind words 🙂 It is not easy to build an accurate Blackbird derivative from existing kits available in the market. At the beginning I thought that it shouldn't be so difficult... The windshield is the one of the biggest pain in the neck. As you said having the Habu evil look is not possible with the existing kit parts and massive modification is required on this area including windshield, front canopy and nose. YF-12 kit has relatively better clear parts and therefore I have cloned these parts and used them as starting point. The windshield is not perfect but at least has correct height and width. It has also flat windows. I have also a mostly finished Sr-71B in 1:48 scale. But I think I need to give a break when I complete this project before starting 1:48 mods. The plastic itself is thicker than 1mm that can tolerate light sanding/filing. But I would recommend to support the surface from inside by gluing 1mm polystyrene card in any case. Regarding to clear parts in 1:48 I will definetely do when I start that mods. Regards Serkan
  6. Serkan Sen
    The original SR-71 kit "glare shield" (or "instrument shroud" 🙂 ) is too big to fit inside YF-12 windshield. I have trimmed the original shroud to fit (the black half) and removed it from modified part (gray one): The temporary windshield was glued with super glue. The front canopy had also fit issues. But this was relatively easy to fix: The sharp edge around windshield was also rounded: Next step is to give front fuselage upper half to its final shape... Serkan
  7. Serkan Sen
    The inner surface shapes of both canopies have been mapped onto plastic card using masking film and the windows were opened: The frame halves were placed and some details were added: Some improvements are needed to close the gap between the rear canopy and kit frame: Next is to fit front canopy and windshield. Serkan
  8. Serkan Sen
    Yesterday I have casted some copies of canopy parts using PUR. The results are really good. These parts will be used in giving the final shape of upper front fuselage half. Also YF-12 clear parts will be casted using these molds to get seamless canopy parts. Serkan
  9. Serkan Sen
    My existing clear epoxy resin needs additional compound to increase UV resistance. I have not experienced yet how the casted parts will look like after a year. There are some crystal clear resin suppliers in ebay from UK claiming that their products are UV resistant and not yellowing ower time. Serkan
  10. Serkan Sen
    I did it already for my Su-27IB conversion and Su-33UBM "What If" projects 🙂
  11. Serkan Sen
    I have used YF-12 parts to make seamless front and rear canopies and prepared the master pieces to create molds: Then I have filled the molds with soft silicone: Next step is to cast canopy and windshield copies to use in forming final nose shape. Serkan
  12. Serkan Sen
    Hi Nikolay, Maybe you can give a try the Hasegawa fine saw blades to rescribe the straight panel lines. It is very useful tool and does the work perfect. Serkan
  13. Serkan Sen
    This is the "Power of Habit"... I did my PhD on CFD and WTT... 😁✈✈✈
  14. Serkan Sen
    I found it here 🙂
  15. Serkan Sen
    There is a great AIAA paper about Blackbirds (I don't remember exactly from where I have downloaded but either from CIA or NASA site) "Design and Development of the Blackbird: Challenges and Lessons Learned Peter W. Merlin* TYBRIN Corporation, NASA Dryden Flight Research Center" On Page 16: "The Blackbirds earned their nickname because they were coated with a high-emissivity black paint for improved heat radiation, thus reducing thermal stresses on the airframe. The first A-12 initially flew unpainted. Early models in the A-12 and YF-12A series were subsequently painted black only on the periphery of the airframe where heating was greatest: on chines, leading and trailing edges, and rudders. Engineers soon realized it would be advantageous to take advantage of Kirchoff’s law of Radiation that describes how a good heat absorber, such as a black body any extremely dark object), is also an efficient heat emitter. Although convective heating decreases with increasing altitude, heat radiation occurs independently of altitude. Therefore, in late 1963, Skunk Works engineers decided to take advantage of the black-body radiation phenomenon by painting the A-12 fleet and subsequent variants entirely black." The different shades of black even dark blue is all infact black. The environmental and operational conditions caused black paint weathered. Serkan
  16. Serkan Sen
    First M-21 fuel dump: This is the M-21 photo showing vents Here is A-12 fuel dump: YF-12 fuel dump: YF-12 has also these vents: And SR-71 fuel dump: I like very much this photo: Serkan
  17. Serkan Sen
    Hi Bill, I am really appreciated to you spending your time to provide all these beautiful photos. I think this has been done to all aircrafts that are in display. Thanks for this detail. I will check if I have already such bulged profile in my modified part, if not it will be added. I have seen these vents on M-21 and A-12B photos as well which does not exist YF-12 kit. I think another clear port exist on upper nose section too. But I am not sure whether they are inline. This is not so bad. I have found many photos on web with open fuel dump. What is not yet clear to me that for the first prototype whether the inboard and outboard elevon trailing edges were inline or not. Serkan
  18. Serkan Sen
    A stunning finish!.. I will feel myself successful when I achieve half of your modeling level. Serkan
  19. Serkan Sen
    Thanks for these precious links Bill!.. It will definitely help a lot when I work on cockpit area... Serkan
  20. Serkan Sen
    Thanks. When all the master parts are ready, I will cast all of them including clear parts. Serkan
  21. Serkan Sen
    Great project with a great introduction...
  22. Serkan Sen
    Some little work on tail cone upper part contour... The shape was not seemed to me very correct. Therefore I have decided to slightly modify it: First starboard side: And now both sides were modified: Also I have worked a bit on fuel dump port: The photo is a bit blurry as I take pictures with my cellular phone and it is not so easy to focus at very tiny area... I know, I am a bit lazy making a proper setup to take nicer pictures... 😁 Serkan
  23. Serkan Sen
    Let us see how the model will look like when completed. After then we can talk about the availability of the parts. I will in any case duplicate the parts for my other planned Blackbirds. Why not to make few more copies for other Blackbird fans? 😁 Serkan
  24. Serkan Sen
    This is the saw blade set with very fine teeth I used to separate the parts: I also have these razor saw blades with longer teeth and a little bit thicker but I have not used them yet: Serkan
  25. Serkan Sen
    Yes Andy, This is one of the etched Hasegawa fine saw blade used for making fine cuts as well as rescribing panel lines. In set there are several fine saws with various shapes/curvatures that fits any curved surface. But they are very thin and can be bended/deformed easily. Serkan
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