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  1. #1
    MarkShapiro's Avatar
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    3W-P51 Refurb Completed

    When I bought this airplane from my friend, Mike, I thought it woulds be a six month refurb job at most. 18 months later, finally done! New power on board, new trim scheme, lots of additional extras. Paint is Alsa Ghost Chrome. Awesome stuff. Crazy expensive, but the results are really nice. Pictures do not do justice. Passers by consistently believe it is metal. Re-maiden should be late August. Hate when my day job interferes with my hobby. Enjoy.
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  2. #2
    MarkShapiro's Avatar
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    RE: 3W-P51 Refurb Completed

    A few more . . .
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  3. #3
    MarkShapiro's Avatar
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    RE: 3W-P51 Refurb Completed

    Still more . . .
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  4. #4
    MarkShapiro's Avatar
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    RE: 3W-P51 Refurb Completed

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  5. #5
    MarkShapiro's Avatar
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    RE: 3W-P51 Refurb Completed

    This part was very time consuming, but obviously crucial; the cooling baffling and the hot-air exhaust. As you can see here, and in the pictures above, the aft vent opens to allow the hot air to escape. The cylindrical shape of the fuselage itself routs the air back and out. On the ground, seems to work fine.
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  6. #6
    MarkShapiro's Avatar
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    RE: 3W-P51 Refurb Completed

    Also had my 3W Bearcat our for maintainence, so clicked off a few shots of the 3W warbird hangar. Shameless, I know.
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  7. #7

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    RE: 3W-P51 Refurb Completed

    Mark,
    Impressive work. Lots of nice detail and moving parts.
    On the inline twin: it looks like the a baffle runs down the center of the engine and then a 45 degree angle baffle on the front.
    Does the angled baffle force air around the right side of the cylinders more efficiently?
    I'm also missing where the air goes on the left side (pilots view)?
    Nice having a tube from the fire wall to the aft vent.
    G. Samuel Parfitt

  8. #8

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    RE: 3W-P51 Refurb Completed

    Last question:
    how do you keep your pavers so neat as mine have weeds constantly growing (third time this summer that I've put down ground clear)?
    G. Samuel Parfitt

  9. #9
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    RE: 3W-P51 Refurb Completed

    Beautiful work Mark. Nicely done. Keep us posted on the re-maiden.

    Dave

  10. #10
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    RE: 3W-P51 Refurb Completed



    It appears to me your cooling air comes in the front on the port side, and exhausts out the door ohn the aft side of the scoop.  Correct? 





    That is a very nice piece of work on your exhaust manifold.  Did you do that work?  Very nice. 





     I also like the way you tinted some of the paneling to make it stand out. You mentioned the type of paint this is.. Is it an automotive paint?  Epoxy?  Two part process, or what.   As you already know,  it looks great!  What kit is this. I'm guessing a CompARF. 





    Dash

    "When you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return."

    AMA # 8870, Member since 1978.
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  11. #11
    MarkShapiro's Avatar
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    RE: 3W-P51 Refurb Completed

    Thanks Sam,
    The angle of the baffle at the front end forces air to flow over the center of the cylinder heads. Once inside the cowl (via ram pressure) the air has nowhere to go except for being forced over and through the cylinder fins, to the starboard side of the engine, where it is vented out through the huge open space in the firewall. I believe that this will also creat a vacuum-like suction, pulling the hot air through the fuselage and out the aft vent. There is no "tube" or ducting from the firewall vent opening to the back vent. Rather, the fuselage itself acts as the "duct" andthe hot air exits through the aft vent. There is a clear path that the hot air can take through the fuselage. Let's hope it works.

  12. #12
    MarkShapiro's Avatar
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    RE: 3W-P51 Refurb Completed

    Thanks Dash,
    The manifold is my design and work. However, I do not have welding skills or equipment. So, I dod a mock up of what I wanted and brought the materials to my local welder. He took it from there. BTW, it works perfectly and sounds great.

    Also Ghost Chrome could be used on anything, really. It is microscopically ground up chrome which is put into a isopropyl alcohol base. You spray it VERY lightly over your black (or other color) basecoat, and it dries in about 3 seconds. Just as soon as teh alcohol evaporates. You must then spray a clearcoat over because it is very delicate. The whole process is very labor intensive, but worth it.

    The Mustang is a 3W kit; not a Comp-Arf. It is actually considerably larger than the Comp-Arf at a 112" wingspan, versus a 100" for the Comp-Arf.

  13. #13
    JohnVH's Avatar
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    RE: 3W-P51 Refurb Completed


    ORIGINAL: MarkShapiro

    Also had my 3W Bearcat our for maintainence, so clicked off a few shots of the 3W warbird hangar. Shameless, I know.
    I want one of those bearcats so bad!
    ORIGINAL: jefflangton
    Time to bend over and let your head pop out!!!!

  14. #14
    Dash7ATP's Avatar
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    RE: 3W-P51 Refurb Completed


    ORIGINAL: MarkShapiro

    Thanks Dash,
    The manifold is my design and work. However, I do not have welding skills or equipment. So, I dod a mock up of what I wanted and brought the materials to my local welder. He took it from there. BTW, it works perfectly and sounds great.

    Also Ghost Chrome could be used on anything, really. It is microscopically ground up chrome which is put into a isopropyl alcohol base. You spray it VERY lightly over your black (or other color) basecoat, and it dries in about 3 seconds. Just as soon as teh alcohol evaporates. You must then spray a clearcoat over because it is very delicate. The whole process is very labor intensive, but worth it.

    The Mustang is a 3W kit; not a Comp-Arf. It is actually considerably larger than the Comp-Arf at a 112" wingspan, versus a 100" for the Comp-Arf.
    This paint sounds a lot like what BVM sells. It has to be applied over a very smooth black base. The photos of some of the Scale jets are hard to tell from the real ones. Very expensive also , I hear. Good luck on the cooling system. The Mustang has a pretty small intake considering the amount of heat that will be generated. As long as your exit opening is large enough you should be OK. I hate to see you have to make another opening in that beautiful finish.Dash
    "When you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return."

    AMA # 8870, Member since 1978.
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  15. #15
    MarkShapiro's Avatar
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    Does anyone know what the travel throws are for the flight surfaces?

  16. #16

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    that engine looks baaaadddd *****$$$$$

  17. #17

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    Hi Mark,

    If you want to use a single fuel feed line, you may want to insure that both legs going to the carbs are of equal length. Fluid dynamics will result in the fuel taking the shorter route. You may want to consider using two fuel feed lines, one to each carb to insure that each carb gets the exact amount you want. Beautiful plane and finish work. Good luck on your maiden.

  18. #18

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    Quote Originally Posted by MarkShapiro View Post
    Also had my 3W Bearcat our for maintainence, so clicked off a few shots of the 3W warbird hangar. Shameless, I know.
    Beautiful job Mark.....also, nice to see someone else's garage is being used for 'hangar' purposes rather than for parking

  19. #19

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    Mark,

    Beautiful job. It appears that some of the panels have a slightly different color or sheen to make them stand out. How did you do that?

    -Ed B.
    Spitfire Brotherhood #185

  20. #20

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    Hey Mark,
    Sorry to crash your thread here but can you give me an estimate on the weight I might be adding to the Firewall on the Bearcat? I am pretty much done. I built this one with the servos in the Stabs like yours, Moki 250 for power.

    Thanks,
    Rex
    Last edited by rbxbear44; 08-28-2013 at 05:50 AM.
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  21. #21

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    Is that capped off plumbing pipe for ballast? Thats ingenious. Gotta remember that.
    Edwin

  22. #22
    MarkShapiro's Avatar
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    Hello Rex,
    I am not sure that I understand your question. Are you asking me how much the firewall weighs?

  23. #23
    MarkShapiro's Avatar
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    Yes, Edwin. That is a ballast for nose weight. It really works very well. In fact, the Bearcat in the pictures above also has this set up for nose weight. The beauty is that the plumbing pipes are themselves pretty heavy and they come in multiple sizes. Then I use 1/4 oz. lead fishing weights and fill up the pipe. Then I take a blow torch and "cook" the lead right in the pipe by heating the pipe on the outside. Just make sure you do this outside and DO NOT get anywhere near breathing in the fumes. They are toxic. Obviously, you must take a weight measure before doing this in order to know how much lead to put in the pipe for melting down.

  24. #24

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    Mark, sorry on two counts...not being clear on what I was looking for and this being a Mustang thread and not a Bearcat Thread! I am ready to CG the Bearcat and was wondering about how much lead weight you needed to add to hit the CG mark on this bird. I built it with a Moki 250 and the servos are in the Stabs as you did yours. Hope this is more clear Thanks!
    Rex
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  25. #25

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    Pretty good idea, I like it. On my round cowls that need lots of weight, I use 1/4" steel plate cut to fit and bolted to the firewall. Worked great on my ziroli stearman.
    Edwin


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