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Old 05-15-2012 | 03:28 PM
  #1  
tachouman's Avatar
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From: Framingham, MA
Default My new projet, Leopard 2A7+

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locked="false"></w:lsdexception><w:lsdexception name="Colorful Grid Accent 6" unhidewhenused="false" semihidden="false" priority="73" locked="false"></w:lsdexception><w:lsdexception name="Subtle Emphasis" qformat="true" unhidewhenused="false" semihidden="false" priority="19" locked="false"></w:lsdexception><w:lsdexception name="Intense Emphasis" qformat="true" unhidewhenused="false" semihidden="false" priority="21" locked="false"></w:lsdexception><w:lsdexception name="Subtle Reference" qformat="true" unhidewhenused="false" semihidden="false" priority="31" locked="false"></w:lsdexception><w:lsdexception name="Intense Reference" qformat="true" unhidewhenused="false" semihidden="false" priority="32" locked="false"></w:lsdexception><w:lsdexception name="Book Title" qformat="true" unhidewhenused="false" semihidden="false" priority="33" locked="false"></w:lsdexception><w:lsdexception name="Bibliography" priority="37" locked="false"></w:lsdexception><w:lsdexception name="TOC Heading" qformat="true" priority="39" locked="false"></w:lsdexception></w:latentstyles></xml><![endif]><![if gte mso 10]><style type="text/css"> Style Definitions */table.MsoNormalTable{mso-style-name:"Table Normal";mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-qformat:yes;mso-style-parent:"";mso-padding-alt:0in 5.4pt 0in 5.4pt;mso-para-margin-top:0in;mso-para-margin-right:0in;mso-para-margin-bottom:10.0pt;mso-para-margin-left:0in;line-height:115%;mso-pagination:widow-orphan;font-size:11.0pt;font-family:"Calibri","sans-serif";mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:"Times New Roman";mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;}</style><![endif]><p class="MsoNormal">Hi all,

I posted a question in another thread about a radio and included some pictures of my build, some members IMed me asking that I should have a seperate thread for this build. Well I'm not as good as some of the members I've seen on this forum with there amazing builds. Well, here it is.

This is a project I&rsquo;ve been working on for 2 years. I took Tamiya&rsquo;s Leopard 2A6 and converted it to a Leopard 2A7+. I took everything in the kit and recast them in brass except for the hull and turret shells (4 parts) since they are way too big for me to recast (You&rsquo;re wondering what does he mean by recast, well it means I took the original parts, made an investment mold (stuff used by jewelers, like plaster) of them, burnt the plastic inside the mold, and poured molten brass in the mold cavities created by the vaporized plastic parts, this is one shot deal, because you can&rsquo;t reuse the mold since it get dissolved when quenched in water to get the metal parts). The rest of the components were either machined in brass and aluminum, or scratchbuilt in styrene or acrylic as masters and recast in metal. There is no aftermarket here; everything is either the original parts or scratchbuilt. The model is heavily reinforced to take the weight of the metal components, and I had to replace the gearbox and turret motors with high torque motors. <span style=""></span>The .50cal RWS is controlled by the radio in both direction wired to a dual control electronic switch with polarity reverse relays, I designed the RWS with elevation and firing lights like the coax, but had to remove them because there was no more space inside the turret (Control and second servo were too big to fit a second one, I&rsquo;ll probably reinstall them once I find a smaller controllers). The model also has 2 lasers, one on the main gun and one in the commander&rsquo;s panoramic site, I&rsquo;m still having problems with rotating the panoramic site due to the limited space inside the turret. I installed a micro video camera in the main gunner site. The headlights circuit board was rewired to high intensity LEDs instead of fiber optic (Fiber optic were kept for the blackout driving), and added the orange LEDs for signal lights.</p><p class="MsoNormal">I&rsquo;m about finished with this model, I&rsquo;ve tested everything and seemed to work fine, I&rsquo;m not sure how it&rsquo;ll do once I take it and run it outside. It&rsquo;ll be painted in desert colors like the one KMW displayed in one of the European arms show (see photos).The one displayed had additional armor on the turret sides, I&rsquo;m not planning to have these armor on the model, since according to KMW they are optional.

Cheers.

T. Chouman

I have 26, 1/16th RC tanks and growing :
1x Tiger (Tamiya, FO), 2x King Tigers(Tamiya, FO), 3x Pershings(Tamiya, FO),1x gepard(Tamiya), 2x Leopard 1A4s (Tamiya), 4x Leopard 2A6s(Tamia FO), 2x Shermans 105 (Tamiya FO), 2x Panthers (Tamiya FO), 1x Panzer IV (Tamiya FO), 1x KV-1 (Tamiya FO), 1x Kubelwagen (Tamiya), 1x T-34/85 (Wasan), 2x Panzer III (HenLong FO), 1x Panzer IV (HenLong FO), 1x KV-1 (HenLong FO), 1x Walker Buldog (HenLong FO).</p>
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Old 05-15-2012 | 03:37 PM
  #2  
tachouman's Avatar
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Joined: Jul 2010
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From: Framingham, MA
Default RE: My new projet, Leopard 2A7+

The real vehicle and additional images of the build.

Cheers.

T. Chouman

I have 26, 1/16th RC tanks and growing :
1x Tiger (Tamiya, FO), 2x King Tigers(Tamiya, FO), 3x Pershings(Tamiya, FO),1x gepard(Tamiya), 2x Leopard 1A4s (Tamiya), 4x Leopard 2A6s(Tamia FO), 2x Shermans 105 (Tamiya FO), 2x Panthers (Tamiya FO), 1x Panzer IV (Tamiya FO), 1x KV-1 (Tamiya FO), 1x Kubelwagen (Tamiya), 1x T-34/85 (Wasan), 2x Panzer III (HenLong FO), 1x Panzer IV (HenLong FO), 1x KV-1 (HenLong FO), 1x Walker Buldog (HenLong FO).

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Old 05-15-2012 | 03:39 PM
  #3  
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Default RE: My new projet, Leopard 2A7+

More images.


I have 26, 1/16th RC tanks and growing :
1x Tiger (Tamiya, FO), 2x King Tigers(Tamiya, FO), 3x Pershings(Tamiya, FO),1x gepard(Tamiya), 2x Leopard 1A4s (Tamiya), 4x Leopard 2A6s(Tamia FO), 2x Shermans 105 (Tamiya FO), 2x Panthers (Tamiya FO), 1x Panzer IV (Tamiya FO), 1x KV-1 (Tamiya FO), 1x Kubelwagen (Tamiya), 1x T-34/85 (Wasan), 2x Panzer III (HenLong FO), 1x Panzer IV (HenLong FO), 1x KV-1 (HenLong FO), 1x Walker Buldog (HenLong FO).

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Old 05-15-2012 | 03:39 PM
  #4  
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Default RE: My new projet, Leopard 2A7+

Amazing work!  It's almost a shame to paint it.<div>
</div><div>Your castings are very nice and your finish work on the metal is great. </div>
Old 05-15-2012 | 03:41 PM
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Default RE: My new projet, Leopard 2A7+

Last set of images.

I'll post videos next.

Cheers.

T. Chouman


I have 26, 1/16th RC tanks and growing :
1x Tiger (Tamiya, FO), 2x King Tigers(Tamiya, FO), 3x Pershings(Tamiya, FO),1x gepard(Tamiya), 2x Leopard 1A4s (Tamiya), 4x Leopard 2A6s(Tamia FO), 2x Shermans 105 (Tamiya FO), 2x Panthers (Tamiya FO), 1x Panzer IV (Tamiya FO), 1x KV-1 (Tamiya FO), 1x Kubelwagen (Tamiya), 1x T-34/85 (Wasan), 2x Panzer III (HenLong FO), 1x Panzer IV (HenLong FO), 1x KV-1 (HenLong FO), 1x Walker Buldog (HenLong FO).

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Old 05-15-2012 | 03:47 PM
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Default RE: My new projet, Leopard 2A7+

Hi again,

Here are some links to videos of testing some of the components I installed. I hope these links work.

http://www.youtube.com/watch?v=WQ09t84G5XI
http://www.youtube.com/watch?v=nf2ZNtKe720
http://www.youtube.com/watch?v=T_7lx89YMZA
http://www.youtube.com/watch?v=eJ144OmLXbc

Cheers.

T. Chouman

I have 26, 1/16th RC tanks and growing :
1x Tiger (Tamiya, FO), 2x King Tigers(Tamiya, FO), 3x Pershings(Tamiya, FO),1x gepard(Tamiya), 2x Leopard 1A4s (Tamiya), 4x Leopard 2A6s(Tamia FO), 2x Shermans 105 (Tamiya FO), 2x Panthers (Tamiya FO), 1x Panzer IV (Tamiya FO), 1x KV-1 (Tamiya FO), 1x Kubelwagen (Tamiya), 1x T-34/85 (Wasan), 2x Panzer III (HenLong FO), 1x Panzer IV (HenLong FO), 1x KV-1 (HenLong FO), 1x Walker Buldog (HenLong FO).

Old 05-15-2012 | 04:45 PM
  #7  
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Default RE: My new projet, Leopard 2A7+

Thanks. That is a fine looking machine.
Old 05-15-2012 | 06:20 PM
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Default RE: My new projet, Leopard 2A7+

That's a cool tank i like it the way it is with the different metals it looks mean
great work
Old 05-15-2012 | 07:35 PM
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Default RE: My new projet, Leopard 2A7+

It's art, plain and simple.

Tremendous effort and work.

What temperature does brass melt?
Old 05-15-2012 | 11:41 PM
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Default RE: My new projet, Leopard 2A7+


Outstanding! First class work and congrats on the fine investment casting work. I'm very nearly ready to do my own investment casting in
addition to my sand casting capability. Happily there's a first rate master of that technique over here when I live from whom I may learn.

Again, outstanding work.


Jerry

Old 05-16-2012 | 02:50 AM
  #11  
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Default RE: My new projet, Leopard 2A7+

Great work, cool video's and a pritty impressive list of tanks you have there.
Old 05-16-2012 | 04:32 AM
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Default RE: My new projet, Leopard 2A7+

beautiful tank....i am working on FO LEO 2A6. myself....i am taking my time with it....
Old 05-16-2012 | 05:01 AM
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Default RE: My new projet, Leopard 2A7+

Outstanding job....WOW!
Old 05-16-2012 | 06:37 AM
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Default RE: My new projet, Leopard 2A7+

Truely amazing, and brass too! That is more patience than I have!

Chouman, you may wish to use a slip ring for 360 degree turret rotation for such a nice model:

http://www.rcuniverse.com/forum/m_11005235/tm.htm
Old 05-16-2012 | 03:47 PM
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Default RE: My new projet, Leopard 2A7+

Thank you all for the nice comments.

I'm still trying to fix some the bugs especially the video RF interference and managing the space inside the turret since it's now full of circuts and wires..

Heavyaslead, I like that slip ring for 360 degree turret rotation you have on your Leo, where did you get that? I'd like to get a couple. Did you make that yourself, or you bought it somewhere?

Ausf, brass melts at 1800 degrees F, but it needs to be brought up to 1870 F to be poured in the mold and the mold has to be at least 1000F. Aluminum melts at 1200 F, and needs to be 1300F to be poured, the mold must be between 400F and 600F.


Cheers.

T. Chouman
__________________

I have 26, 1/16th RC tanks and growing :
1x Tiger (Tamiya, FO), 2x King Tigers(Tamiya, FO), 3x Pershings(Tamiya, FO),1x gepard(Tamiya), 2x Leopard 1A4s (Tamiya), 4x Leopard 2A6s(Tamia FO), 2x Shermans 105 (Tamiya FO), 2x Panthers (Tamiya FO), 1x Panzer IV (Tamiya FO), 1x KV-1 (Tamiya FO), 1x Kubelwagen (Tamiya), 1x T-34/85 (Wasan), 2x Panzer III (HenLong FO), 1x Panzer IV (HenLong FO), 1x KV-1 (HenLong FO), 1x Walker Buldog (HenLong FO).
Old 05-16-2012 | 06:44 PM
  #16  
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Default RE: My new projet, Leopard 2A7+

Do you use a vacuum or a centrifuge to pour?<div></div><div>Torches or kiln?</div><div></div>
Old 05-17-2012 | 02:48 PM
  #17  
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Default RE: My new projet, Leopard 2A7+


ORIGINAL: Pah co chu puk

Do you use a vacuum or a centrifuge to pour?<div></div><div>Torches or kiln?</div><div></div>
I use combined Vacuum and pressure casting (Mold under vacuum, molten metal under pressure). and I use a kiln for burn out and for mold curing.

Cheers.

T. Chouman

Old 05-17-2012 | 04:10 PM
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Default RE: My new projet, Leopard 2A7+

Sweet.

I have a kiln, vacuum and pressure casting systems, so I may research this a bit. I've always wanted to make a Pz I, since the angles are great for metal and I could fabricate the rest in resin, but track links are the wild card. I don't think such a thin structure will hold up in plastic under strain, but an alloy would be ideal. I was looking into it a while back (bismuth I think) but shelved the idea.

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