Sherman Duplex Drive...

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FredtheFrench
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Re: Sherman Duplex Drive...

Post by FredtheFrench »

Thank you Maccrage. Faster than me and maybe more comprehensive than my message. Thx. :thumbup:
Sorry for my spelling mistakes, I try to do better every day...
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43rdRecceReg
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Re: Sherman Duplex Drive...

Post by 43rdRecceReg »

I had one other pic of the right side sprocket arrangement..
Again, the barriers around the tank got in the way.
Sherman DD at Bovington. Right Hand sprocket array
Sherman DD at Bovington. Right Hand sprocket array
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.
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FredtheFrench
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Re: Sherman Duplex Drive...

Post by FredtheFrench »

This is my video about this tank during swimming test last november.

Sorry, this video is bad, but I need to buy a video editing software.

I hope you will like the work ( the tank, not the video :haha: ).


https://www.youtube.com/watch?v=0DqylxQMlrs
Sorry for my spelling mistakes, I try to do better every day...
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jhamm
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Re: Sherman Duplex Drive...

Post by jhamm »

Very rare model - excellent!
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Max-U52
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Re: Sherman Duplex Drive...

Post by Max-U52 »

Looks great. I don't see a rudder. How do you steer, by applying more power to one propeller? It seems to work very well. 8)
When FDR coined the phrase "The Arsenal of Democracy", he was talking about Detroit. Proud to live in the 2nd most violent city in America!!
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43rdRecceReg
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Re: Sherman Duplex Drive...

Post by 43rdRecceReg »

Max-U52 wrote:Looks great. I don't see a rudder. How do you steer, by applying more power to one propeller? It seems to work very well. 8)
I wondered that as well, Gary. On the DD in Bovington, it appeared that the propellers were attached to swivelling brackets, so they could both be moved together to apply a variable thrust to starboard, or port. With fixed propellers, I guess the method you suggest looks like the only practical option. :) With pointy prow, however, it would work quite well.. :think:
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.
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FredtheFrench
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Re: Sherman Duplex Drive...

Post by FredtheFrench »

Max-U52 wrote:Looks great. I don't see a rudder. How do you steer, by applying more power to one propeller? It seems to work very well. 8)
43rdRecceReg wrote:
Max-U52 wrote:Looks great. I don't see a rudder. How do you steer, by applying more power to one propeller? It seems to work very well. 8)
I wondered that as well, Gary. On the DD in Bovington, it appeared that the propellers were attached to swivelling brackets, so they could both be moved together to apply a variable thrust to starboard, or port. With fixed propellers, I guess the method you suggest looks like the only practical option. :) With pointy prow, however, it would work quite well.. :think:


Exactly. For me, it was impossible to recreate the system at 100% identic. The true system works like 43rdRecceReg explain. But mine works with a slower propeller, or to be faster, with inversed propeller between right and left.

I hope my explanation is clear? Sorry guys and thank you for interest.
Sorry for my spelling mistakes, I try to do better every day...
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FredtheFrench
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Re: Sherman Duplex Drive...

Post by FredtheFrench »

Good evening guys.


This is a link available only for a week!!!
It is about the French documentary about the Sherman Duplex drive. My model can be seen at 40min20s to 42min55s.

The site who was filming the experience with my model, is a very sensitive military site. It is the same site where the royal navy comes to try new propellers and others things to test for boats and submarines.


The link:


https://rmcdecouverte.bfmtv.com/vestige ... gram_5767/
Sorry for my spelling mistakes, I try to do better every day...
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FredtheFrench
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Re: Sherman Duplex Drive...

Post by FredtheFrench »

Sorry for my spelling mistakes, I try to do better every day...
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43rdRecceReg
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Re: Sherman Duplex Drive...

Post by 43rdRecceReg »

Many thanks for the Link, Fred, and also- of course- for the unique thread you have created here. :clap: :thumbup:
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.
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