Mbt 70 wip .....
10-04-2014, 07:54 AM
#51
I didn't want to bring that up earlier in the thread, but do you plan to have the suspension work like the real thing... just like the S-Tank did as well? This is a key element to the real tank as they thought back then the hull down defense was more effective than thicker armor.
Actually an S-Tank really sounds more attractive to me than the MBT-70 just because it's a turretless tank. They are my favorite 'type' of tank.
Hope we see more pics Rex! This is going to be the build of the year right here on RCU.
(Now for me to re-enage on my stuff. LOL)
Jeff
Actually an S-Tank really sounds more attractive to me than the MBT-70 just because it's a turretless tank. They are my favorite 'type' of tank.
Hope we see more pics Rex! This is going to be the build of the year right here on RCU.
(Now for me to re-enage on my stuff. LOL)
Jeff
10-04-2014, 09:14 AM
#53
Yesssss! Right on! 
Jeff
Jeff
10-04-2014, 10:56 AM
#55
10-05-2014, 05:38 AM
#57
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The stuff you do without a 3 D printer and laser cutter are simply amazing. You have my deepest respect, and are an example of what a master modeler does. Congrats on the news with respect to the baby on the way.
My Daughter is two weeks away from making me a Grandpa. I suggested a baby layout with a Sherman instead of a lace cloth. Big no on that idea.
Anyway, a great looking tank you have started there and I am simply amazed by what you can accomplish.
My Daughter is two weeks away from making me a Grandpa. I suggested a baby layout with a Sherman instead of a lace cloth. Big no on that idea.
Anyway, a great looking tank you have started there and I am simply amazed by what you can accomplish.
10-05-2014, 06:18 AM
#58
Thread Starter
The stuff you do without a 3 D printer and laser cutter are simply amazing. You have my deepest respect, and are an example of what a master modeler does. Congrats on the news with respect to the baby on the way.
My Daughter is two weeks away from making me a Grandpa. I suggested a baby layout with a Sherman instead of a lace cloth. Big no on that idea.
Anyway, a great looking tank you have started there and I am simply amazed by what you can accomplish.
My Daughter is two weeks away from making me a Grandpa. I suggested a baby layout with a Sherman instead of a lace cloth. Big no on that idea.
Anyway, a great looking tank you have started there and I am simply amazed by what you can accomplish.
Dan
Thanks for the words of encouragement. If I could do CAD drawings and had a 3D printer or laser cutter, I could build my projects easier, faster and more accurately than I do using my hammer and hacksaw method. But I'm just a stubborn old coot who is too old to teach new tricks. I am attempting to build that drivers cupola now and I think what I drew up on paper is going to work out in styrene. I hope it works out. So far- so good (but I have said that before). If you know already, will your grandkid be a boy or girl? If it's a boy he can be named after a number of tanks --- Sherman, Stuart, Abram, etc. If it's a girl, ya gotta go with Matilda ........!!!!
Rex
10-05-2014, 07:56 AM
#60
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10-05-2014, 12:30 PM
#61
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Hi Rex
Re the drivers cupola, I was thinking in terms of having 2 sets of turret rotation gear, 1st one mounted normally under the turret, the 2nd one mounted within the turret & connected to the 1st via the split ring, but with reversed polarity, so that every input to the main rotation gear results in a reversed input to the drivers cupola - ie contra-rotation. Of course whether that would actually work consistently, or would need constant recalibrating to zero it, you'd find out in the wash. A further difficulty, when the tank goes into reverse, the driver's cupola faces to the rear so he can see where he's going. Not sure how you'd arrange that unless there was a linkage to the reverse some how, which is getting way beyond my skills.
It occurred to me that the drivers controls would have to be 'fly-by-wire' as per modern jet fighters, as purely mechanical linkages couldn't be used. Given this was before fly-by-wire was commonly available, it no doubt helped to push the costs up.
Mal
Re the drivers cupola, I was thinking in terms of having 2 sets of turret rotation gear, 1st one mounted normally under the turret, the 2nd one mounted within the turret & connected to the 1st via the split ring, but with reversed polarity, so that every input to the main rotation gear results in a reversed input to the drivers cupola - ie contra-rotation. Of course whether that would actually work consistently, or would need constant recalibrating to zero it, you'd find out in the wash. A further difficulty, when the tank goes into reverse, the driver's cupola faces to the rear so he can see where he's going. Not sure how you'd arrange that unless there was a linkage to the reverse some how, which is getting way beyond my skills.
It occurred to me that the drivers controls would have to be 'fly-by-wire' as per modern jet fighters, as purely mechanical linkages couldn't be used. Given this was before fly-by-wire was commonly available, it no doubt helped to push the costs up.
Mal
10-05-2014, 03:39 PM
#62
Thread Starter
Mal ...... I just spent the afternoon building my idea on how to do it with a linkage arrangement and It was not successful. It worked in my mind, it worked on paper, but didn't work in styrene. Hey .... at least I got two out of three . LOL I was considering a reduction gear train of some sort too, but there also is a space limitation that exists. I think the answer is to teach the driver to stick his fat head out of his hatch wearing a helmet and goggles. If that was good enough for Patton it should be good enough for him. Right now I'm just bummed out about this. 
But tomorrow is another day 
But tomorrow is another day
10-05-2014, 03:51 PM
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Hi Rex
"but didn't work in styrene" - I know how that feels. "but there also is a space limitation that exists" - does that mean youre making a solid turret? I was thinking you'd make a hollow turret, with plenty of space given the size of it?
Actually your tomorrow is my today - just about 1.00pm in the afternoon
Mal
"but didn't work in styrene" - I know how that feels. "but there also is a space limitation that exists" - does that mean youre making a solid turret? I was thinking you'd make a hollow turret, with plenty of space given the size of it?
Actually your tomorrow is my today - just about 1.00pm in the afternoon
Mal
10-05-2014, 04:05 PM
#64
Thread Starter
Hi Rex
"but didn't work in styrene" - I know how that feels. "but there also is a space limitation that exists" - does that mean youre making a solid turret? I was thinking you'd make a hollow turret, with plenty of space given the size of it?
Actually your tomorrow is my today - just about 1.00pm in the afternoon
Mal
"but didn't work in styrene" - I know how that feels. "but there also is a space limitation that exists" - does that mean youre making a solid turret? I was thinking you'd make a hollow turret, with plenty of space given the size of it?
Actually your tomorrow is my today - just about 1.00pm in the afternoon
Mal
10-05-2014, 04:45 PM
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Hi Rex
Cool. "A few minutes ago I just had another brain storm on a way that might work. " as long as you're not trying to replicate Edison's - 10,000 ways that won't work?
Mal
Cool. "A few minutes ago I just had another brain storm on a way that might work. " as long as you're not trying to replicate Edison's - 10,000 ways that won't work?
Mal
10-06-2014, 05:52 AM
#66
Thread Starter
Actually, I do have another gizmo thingy that will/could work. I will make a test rig this morning and post photos of my glorious invention today. Unless it doesn't work. Rex
10-06-2014, 06:17 AM
#67
Rex, remember to add this to end of....."I will make a test rig this morning and post photos of my glorious invention today!!! Mooooohahahahaha!!!" has to be said with a slight German accent aka Dr. Frankenstein esk.
Last edited by MAUS45; 10-06-2014 at 10:28 AM.
10-06-2014, 10:35 AM
#68
Thread Starter
Mooooohahahahaha!!!" ........ Ja Mein freund ........ IT LIVES !!!! Igor ... open the Champagne !
Well, at least it works. By a stroke of good luck and a minor miracle, I found three identical gears that looked like they might work for a reverse rotation gear train. Incredibly, the distance between the turret center and the cupola center exactly matched the axle center spacing of the three gears. The central gear is fixed and the next gear rotates to turn the cupola gear in the opposite direction. How simple. could it be? The cupola always faces forward no matter in which direction the turret is facing. None of the turret rotation ring gears that I have will fit this turret, so I will have to make a new ring gear to drive the turret. No big deal, just another fun problem to handle.
10-06-2014, 12:38 PM
#69
Mooooohahahah!!! Das ist sar goot!!! A glorious invention indeed!!! Now can I help you with that hump? I am a surgeon.
Now can I help you with that hump? I am a surgeon.
10-08-2014, 04:05 PM
#71
Thread Starter
I installed some rough framing and will use some thin cardboard to make patterns for the outer skin. This will allow me to see if I got it right and make corrections before I skin it with styrene. There are some details of the equipment on the sides that will require some cutting of the side skin to build and I only wanna build this thing once............ It pays to plan ahead. I just might try to start doing that on this project.
10-08-2014, 04:49 PM
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Hi Rex
Looking good. Your solution to the Drivers cupola reminded me of thinking of doing something similar years ago, wanted to have twin contra rotating props, driven by a single motor, to upgrade my frigate. The cog requirement to acheive that was 4 cogs in line across, so that the outer 2 cogs turned towards each other. Ended up being a purely mental build.
Mal
Looking good. Your solution to the Drivers cupola reminded me of thinking of doing something similar years ago, wanted to have twin contra rotating props, driven by a single motor, to upgrade my frigate. The cog requirement to acheive that was 4 cogs in line across, so that the outer 2 cogs turned towards each other. Ended up being a purely mental build.
Mal
10-14-2014, 08:09 AM
#73
Thread Starter
Some progress has been made, but before I post the update on my MBT 70 project, I am thinking about starting a thread about "Helpful Hobby Hints", starting with the subject "Safety is Good".
HHH #1. When using a Dremel tool with a circular saw blade spinning at 30,000 rpm, be careful so that it doesn't kick back and come in contact with any fingers on your left hand. Since the razor sharp very thin blade is rotating at warp speed, you won't even feel the intrusion into the digit that opposes your thumb until you begin to wonder why your work surface is turning red with a warm sticky liquid. Find the source of what has caused this messy situation and take the proper steps to correct it immediately. A formica work surface and white styrene will wash off nicely with warm soapy water.
And now, for the update photos.. I am done building the big parts and will be moving on to the medium and small details soon, unless there are any more unforeseen mishaps.
It's weird where you can find tank parts sometimes ..... I opened the door on my refrigerator and saw a small tank turret for an MBT 70 ...... WOW. It was made by that famous German weapons manufacturer ------ H.J. Heinz ----- and it fits pretty good, but not perfect. It looked like a shortcut that would save me some time and allow me to ketchup because I am behind schedule building this project.. But the turret I need has a split hatch cover, so I might as well just build one.
HHH #1. When using a Dremel tool with a circular saw blade spinning at 30,000 rpm, be careful so that it doesn't kick back and come in contact with any fingers on your left hand. Since the razor sharp very thin blade is rotating at warp speed, you won't even feel the intrusion into the digit that opposes your thumb until you begin to wonder why your work surface is turning red with a warm sticky liquid. Find the source of what has caused this messy situation and take the proper steps to correct it immediately. A formica work surface and white styrene will wash off nicely with warm soapy water.
And now, for the update photos.. I am done building the big parts and will be moving on to the medium and small details soon, unless there are any more unforeseen mishaps.
It's weird where you can find tank parts sometimes ..... I opened the door on my refrigerator and saw a small tank turret for an MBT 70 ...... WOW. It was made by that famous German weapons manufacturer ------ H.J. Heinz ----- and it fits pretty good, but not perfect. It looked like a shortcut that would save me some time and allow me to ketchup because I am behind schedule building this project.. But the turret I need has a split hatch cover, so I might as well just build one.
10-14-2014, 12:20 PM
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Hi Rex
Looking really good. You appear to be rediscovering that Blood, Sweat & Tears is a normal part of model making, though you may want to cut down on the blood - or was that what you were trying to do - the cutting down part?
Mal
Looking really good. You appear to be rediscovering that Blood, Sweat & Tears is a normal part of model making, though you may want to cut down on the blood - or was that what you were trying to do - the cutting down part?
Mal
