Sherman M4A3E8 76(w) HVSS Prototype

Forum for discussion relating to the Sherman.
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Armortek
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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by Armortek »

Some progress on the Sherman prototype. Parts are all coming together nicely - some have veeeery long run times on the machines.
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Sherman z5.jpg
Sherman z5.jpg (98.26 KiB) Viewed 1059 times
Sherman z4.jpg
Sherman z4.jpg (77.93 KiB) Viewed 1059 times
Sherman z3.jpg
Sherman z3.jpg (77.02 KiB) Viewed 1059 times
Sherman z2.jpg
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Sherman z1.jpg
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Jerry Carducci
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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by Jerry Carducci »

Stephen White wrote:
Mon Mar 08, 2021 11:29 am
Armortek wrote:
Fri Mar 05, 2021 10:48 am

Our recommended radio of choice going forwards will be the Taranis x9d plus 2019
https://www.frsky-rc.com/product/taranis-x9d-plus-2019/
Umm.... Knowledge Base anyone? The X9D is a great radio for our models but the scope for screwing up OpenTx is considerable unless there's some simple guidance.
I've been experimenting, bench testing with my older Taranis (pre-2019) x9d to control the guts of my M3 Lee.

I'm using:

-2018 Taranis Plus x9d Tx ( using OpenTx 2.3)
-external XJT Tx module
-X8R receiver
-24v 24Ah LiFePo

I'm a old Mode 2 Tx user (since my earliest Futaba days in the 70's) setting defaults as AETR with my tank drive controls on the left stick- throttle and steering. I want to use the left stick for forward/ reverse and steering; it's how I've set up every tank I have.

I'm using Open TX Companion on a Win10 desktop to configure the Tx and model profile(s) via USB connection for this testing.

Modules I've attached so far are motion and sound with the focus of my tests being controlling the L/R drive motors and two geared motors
for turret functions. So far all is well mixing Rudder and throttle except some odd performance near neutral for main drive controls- one motor
insists on continuing running ever so slowly. I think I may have to implement some sort of compensating offset on the output definition or some sort of curve. Still fiddling with that. Other controls seem normal including fail safe settings (set to zero for channels 1-16)- I tested it by shutting down the transmitter with the receiver and modules still powered up and all motors came to a stop ( except for the rogue creeping mentioned above!).

I think that's about it. If someone has a profile they like that works well I'd appreciate comparing notes regarding your settings. If anyone wants a copy of mine I'm sure I could send a zipped backup of my definition as it is so far.

Jerry
http://tanks.linite.com/ - RC tanks: stay home, build a tank and save a life!

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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by Stephen White »

Jerry, great stuff. In order not to hijack this Sherman thread, I’ve copied your post to a new OpenTx thread in the Knowledge Base:

viewtopic.php?f=33&t=8585

Stephen

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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by Roy Beukeveld »

Very impressive model! I really love the volute spring bogies, they look absolutely amazing 8)
Kind regards,
Roy

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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by Armortek »

A few more prototype photos to see us into the weekend.
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Sherman a15.jpg
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Sherman a14.jpg
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Sherman a11.jpg
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Sherman a10.jpg
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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by William Vallejo »

Talk about the quintessential torture master. You do know how to churn the anticipation.😈

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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by William Vallejo »

Roy Beukeveld wrote:
Sun Mar 21, 2021 10:51 am
Very impressive model! I really love the volute spring bogies, they look absolutely amazing 8)
I must agree. Not only was the HVSS a great improvement, I think it’s visually more pleasing to the eye.

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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by Armortek »

Some more pictures of the prototype. We ill swap out the hex heads on the light guards to button heads to make them a bit more subtle.

Tank looks so much better with the tracks on - although the tracks are not on right as the sprocket is loose and some of the rubber tyres are not on the model.

Shipping is currently looking like it will be end of May/ Early June. We are very much in the hands of suppliers at this stage - all of the machining that we can do will be finished next week - we then need to sit pretty and wait for the tracks, castings and tyres ... and the driven gear which is now 8 weeks overdue :evil:

Still - that will give us plenty of time to test out the new elevation mechanism for this model.
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Sherman z8.jpg
Sherman z7.jpg
Sherman z6.jpg
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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by Tim Page »

That is really coming together nicely.
It is a shame that the headlight guards have to be bolted in place when they were welded on the original tanks.

Could you not have the legs locating into holes and then epoxy in place.
This would look a lot more realistic and would still be secure.

So far everything else looks spot on and really well detailed.

Tim
2008 Armortek Panther ausf.G #0035
2009 Armortek BefehlsPanzer 111 ausf.J #0011
2010 Armortek A34 Comet #0031 (SOLD)

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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by William Vallejo »

Tim Page wrote:
Thu Apr 08, 2021 11:34 am
That is really coming together nicely.
It is a shame that the headlight guards have to be bolted in place when they were welded on the original tanks.

Could you not have the legs locating into holes and then epoxy in place.
This would look a lot more realistic and would still be secure.

So far everything else looks spot on and really well detailed.

Tim
A very good precision welder could possibly accomplish this.

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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by William Vallejo »

William Vallejo wrote:
Thu Apr 08, 2021 11:59 am
Tim Page wrote:
Thu Apr 08, 2021 11:34 am
That is really coming together nicely.
It is a shame that the headlight guards have to be bolted in place when they were welded on the original tanks.

Could you not have the legs locating into holes and then epoxy in place.
This would look a lot more realistic and would still be secure.

So far everything else looks spot on and really well detailed.

Tim
A very good precision welder could possibly accomplish this.
Never mind. It appears to me that the light guards are steel.

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Re: Sherman M4A3E8 76(w) HVSS Prototype

Post by Jerry Carducci »

Having the Easy Eight is going to be sooo cool...

Jerry
http://tanks.linite.com/ - RC tanks: stay home, build a tank and save a life!

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