Overclockers Australia Forums

OCAU News - Wiki - QuickLinks - Pix - Sponsors  

Go Back   Overclockers Australia Forums > Specific Hardware Topics > Electronics & Electrics

Notices


Sign up for a free OCAU account and this ad will go away!
Search our forums with Google:
Reply
 
Thread Tools
Old 1st January 2017, 5:43 PM   #1
Jazper Thread Starter
Member
 
Join Date: Jul 2001
Location: Melbourne Australia
Posts: 2,264
Default NSW - Tank (yep, 52 ton) guy looking for some assistance

Posting on behalf of an acquaintance

So, this guy has a tank, that's right a 1951 tank, he's off in country NSW and the tank he's got has got a problem. The problem is with the Gyros which operate the turret, and the tech is (as you can imagine) ancient.

He's looking for someone who might be able to build a replacement system for managing the gyros/turret.

The turret operates on a metadyne, and is fully electric using 24v DC/150A. He has substantial documentation, so schematics, and descriptions of how it all works in stock form. If anyone is interested in taking this on (and potentially getting paid for your time) let me know, either by pm or in this thread, and I'll put you in touch with the tank guy.

Shouldn't be rocket science, arduino (due or something) with a few gyros hooked up to relays etc..

If no one is interested, I'll think about taking it on myself.
__________________
I buy broken roomba vacuum robots, please PM me if you have one to sell!

Last edited by Jazper; 1st January 2017 at 5:45 PM.
Jazper is offline   Reply With Quote

Join OCAU to remove this ad!
Old 1st January 2017, 6:23 PM   #2
mtma
Member
 
Join Date: Aug 2009
Posts: 4,263
Default

Damn the whole description is a teaser... I'm guessing at 52 tonnes the guy has a Centurion?
mtma is offline   Reply With Quote
Old 1st January 2017, 6:25 PM   #3
Jazper Thread Starter
Member
 
Join Date: Jul 2001
Location: Melbourne Australia
Posts: 2,264
Default

Quote:
Originally Posted by mtma View Post
Damn the whole description is a teaser... I'm guessing at 52 tonnes the guy has a Centurion?
Yep, you get to drive it too...

Docs here

https://www.dropbox.com/s/wlss1ingra...705_o.zip?dl=0
__________________
I buy broken roomba vacuum robots, please PM me if you have one to sell!
Jazper is offline   Reply With Quote
Old 1st January 2017, 6:55 PM   #4
B.D.R
Member
 
B.D.R's Avatar
 
Join Date: Dec 2010
Posts: 4,983
Default

Get your mate to send this bloke a email, he might know some one with one floating around....although I am tipping they probably know each other

http://www.raeme.info/spt819d.php?spt=cents&item=1
__________________
Quote:
Originally Posted by Moptimus View Post
It is like saying that they are not true unicorn tears because you made the unicorn watch the notebook, and forced it to cry - rather then the normal method of killing it's parents.
While they are slightly different, for this purpose they are close enough to be indistinguishable.
B.D.R is online now   Reply With Quote
Old 1st January 2017, 7:25 PM   #5
Soc
Member
 
Join Date: Jun 2001
Posts: 859
Default

My dad was a raeme tank tech, might know how the cents were fixed originally...
Soc is offline   Reply With Quote
Old 1st January 2017, 7:39 PM   #6
Soc
Member
 
Join Date: Jun 2001
Posts: 859
Default

Just had a chat to dad and he said it was probably the STAB system and its similar to the system on the leopards if so.

He's good on clutch, engine and the whole driveline (and would be happy to help if needed) but wasn't working on the electrical side. He's going to ask around in the next week to see if he can find someone who worked on the original systems.

If he finds something, I'll let you know.
Soc is offline   Reply With Quote
Old 1st January 2017, 7:39 PM   #7
Jazper Thread Starter
Member
 
Join Date: Jul 2001
Location: Melbourne Australia
Posts: 2,264
Default

He wants to replace the original gyros and control box, as they're becoming hard to get
__________________
I buy broken roomba vacuum robots, please PM me if you have one to sell!
Jazper is offline   Reply With Quote
Old 1st January 2017, 8:23 PM   #8
RobRoySyd
Member
 
Join Date: Jan 2008
Location: Sydney
Posts: 7,461
Default

Quote:
Originally Posted by Jazper View Post
Shouldn't be rocket science, arduino (due or something) with a few gyros hooked up to relays etc..

If no one is interested, I'll think about taking it on myself.
Not much short of rocket science except it's V2 vintage.

The two axis gyro provide an AC voltage proportional to the acceleration of the tank in two axis. In turn that keeps the elevation and traverse of the gun pointed at the same position. Added into that is the gunners input to aim his gun. There's all manner of interlocks and limits built into the system.

You'd also want to ask upfront how much the owner wants to keep original. Interfacing to the original gear could be quite a challenge. This is serious heavy metal with lots of potential for components to get damaged.

First thing I'd suggest trying to do is to diagnose what's wrong with the original gyro and/or amplifiers.

[edit]

That takes care of some of the above.

OK, then step one is understanding exactly how the parts he wants to replace interact with the rest of the system. Overall it's a pretty big job even then. Not like you can just stuff it all in a plastic box and hot glue it somewhere.
__________________
"Those who make peaceful revolution impossible will make violent revolution inevitable." JFK

Last edited by RobRoySyd; 1st January 2017 at 8:28 PM.
RobRoySyd is online now   Reply With Quote
Old 1st January 2017, 10:25 PM   #9
crazyau
Member
 
Join Date: Aug 2004
Posts: 61
Default

Maybe try Keith farmer Glen Simpson, His tank will be at https://www.facebook.com/KeithDDD/

But if only around 150 came back to Oz, I guess all restorers would already know of each other.
crazyau is offline   Reply With Quote
Old 2nd January 2017, 6:57 AM   #10
Redferatu
Member
 
Join Date: Oct 2011
Posts: 101
Default

Guy in Cowra is selling the stuff from the war museum. Probably has parts, knows of mechanics, etc. I would call them.
Redferatu is offline   Reply With Quote
Old 2nd January 2017, 11:04 AM   #11
RobRoySyd
Member
 
Join Date: Jan 2008
Location: Sydney
Posts: 7,461
Default

The only components I can see in this system that would be close to impossible to repair are the vacuum tubes. For the rest new mechanical parts can be made by anyone with a lathe and mill. Carbon brushes could be a challenge although I recall people getting ones larger than needed and filing to fit. Used to work with an ex Royal Navy guy who maintained the electrics on a boat for the Maritime Museum (Lady Hopetoun?). The analogue meters were a challenge.
__________________
"Those who make peaceful revolution impossible will make violent revolution inevitable." JFK
RobRoySyd is online now   Reply With Quote
Old 2nd January 2017, 5:18 PM   #12
Jazper Thread Starter
Member
 
Join Date: Jul 2001
Location: Melbourne Australia
Posts: 2,264
Default

First of all, a big thankyou to everyone who has replied to this thread.

As one of the tasks, the owner wants to speed up the "spool up" of the turret. It currently takes about 40 mins to get going when the equipment is cold, so another reason to look at getting a new system in place.

To answer a few questions:
1. The owner wants to keep things looking original but is open to modification or even replacement of existing systems.
2. The owner wants to modernise wherever possible to more reliable systems, and if possible, speed up "boot" time of the turret.
3. There is a big box where the original equipment for this sits. Plenty of room to retrofit.
4. Existing gear replacement is a non starter - expensive and very very difficult to get, or need to be custom made.

Ideally the idea would be to control the turret with new electronics, however that would work.
__________________
I buy broken roomba vacuum robots, please PM me if you have one to sell!
Jazper is offline   Reply With Quote
Old 2nd January 2017, 10:00 PM   #13
RobRoySyd
Member
 
Join Date: Jan 2008
Location: Sydney
Posts: 7,461
Default

Quote:
Originally Posted by Jazper View Post
As one of the tasks, the owner wants to speed up the "spool up" of the turret. It currently takes about 40 mins to get going when the equipment is cold, so another reason to look at getting a new system in place.
The spool up time arises from the existing gyros spinning at 12,000 RPM and being spun using induction.

Quote:
Ideally the idea would be to control the turret with new electronics, however that would work.
IMU modules are readily available.
Need electronics to interface to existing gun elevation and traverse sensors. Existing sensors seem pretty crude but replacing them with modern encoders would involve challenges.
Other challenge is driving the motors, lots of amps involved.


I know someone who might be interested, he's worked on the camera mounts that go on helicopters and he has a machine shop. Keeping a camera pointed in the same direction is no different to keeping a gun pointed at the same target. The people who make the camera mounts also make systems for guns and missiles, no surprise really.

Have to say in true OCAU ethos that there's one important thing missing from the functional specification. Not much point having a turret that keeps a gun pointed at a target when the gun cannot fire, boring.
I feel a need, a need for "tank paintball".

[edit] He's taken the bait, PM sent.
__________________
"Those who make peaceful revolution impossible will make violent revolution inevitable." JFK

Last edited by RobRoySyd; 3rd January 2017 at 7:13 AM.
RobRoySyd is online now   Reply With Quote
Old 12th January 2017, 8:34 AM   #14
Malakai
Member
 
Malakai's Avatar
 
Join Date: Aug 2001
Location: Brisbane, Australia
Posts: 612
Default

Oh I have to follow this thread, amazing!
__________________
Trusted Traders: [7]nothing, bees_man, Bollocks, mas_wiro, finnigan, D r M u t l e y, Grim_Revenant, aXLe, DeanCorp, trevdav, Iceman, XTRO, Loop Goose, dragon_keepa, mewerz, Technics, Makon0, CQGLHyperion, sp00nfed, THELTD
Malakai is offline   Reply With Quote
Old 12th January 2017, 8:38 AM   #15
/invariance\
Member
 
/invariance\'s Avatar
 
Join Date: May 2012
Location: Brisbane
Posts: 579
Default

If there was any way the communication could be kept up and this thread turned into a worklog, it would be epic!
__________________
F@H Stats BOINC Stats
Folding: Phenom II 1100T, ASUS M5A99X EVO, 8G Patriot PG38G1600EL, Sapphire R9 270, MSI HD7870 Twin Frozr3.
The only BS I want to hear is from a Model M: IBM Model M, P/N 1391401, DOB 04FEB87.
Smooth vintage MX blacks on a Wyse 85 courtesy of Soarer's Wyse Converter.
/invariance\ is online now   Reply With Quote
Reply

Bookmarks

Sign up for a free OCAU account and this ad will go away!

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time now is 7:33 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
OCAU is not responsible for the content of individual messages posted by others.
Other content copyright Overclockers Australia.
OCAU is hosted by Micron21!