I am sorry to say that Hellcat will not be ready for the Brisbane event.
The ram I have is turning out to be just too large for a feather weight and I have run out of time/money to source a replacement.
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Get Some!!!

Secretary of the Queensland Robotics Sports Club inc.

so whats planned now mister kerrison, RESSURECT PRANCING QUEEEENN< YAYYY
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Andrew Welch, Team Unconventional Robotics

Now that the test setup that was bolted onto Hellbringer for the Brisbane event worked OK I will now get started on the feather weight.
I will need to replace the guage and the 20oz CO2 tank as they both took hits from Fragmentor during a demo match (while imobilised). Since the guage was taken from an old air compressor that will be easy. The CO2 tank is not ruptured but has a 2-3mm deep gash in the side and while I did use it again on Sunday it will not be used again except maybe as a low pressure buffer or drink bottle. Obviously I will need to actualy put some armour over the tank as those things arn't cheap.
I have just bought a new ram off Ebay that while being of the same make and model as the old one has only a 50mm bore and 100mm stroke and weighs about 1.6kg compared to the 4.5kg larger ram. Because this ram is smaller I will be switching to a 12oz CO2 tank which I have calculated will give me 115 flips at 7bar.
I am still looking for drive motors and gearboxes and the money to pay for them so I havn't started building the chassis yet. In a couple of weeks I should have enough money for a couple of GB42 gearboxes from www.robotpower.com but until then I will continue planing the chassis layout.
_________________
Get Some!!!

Secretary of the Queensland Robotics Sports Club inc.

Nice gearbox! I was looking for one for the mini ev today(didn't find any). Do these compare at all to the TWR18 http://www.teamwhyachi.com/twrgearmotor.htm ?

they look like the big version of what nick used on jolt, probably not going to last long. those gb42s look like some hefty engineering
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

I havn't started building yet I am still collecting parts.
I have decided to modify my old SS2 gearboxes to take a 550 size drill motor. This is primarily a cost saving issue and since I have not had any problems with the gearboxes yet, only the HTI motors they where designed for (which are no longer available with the correct pinion) I am going to stick with them.
The new ram and CO2 bottle has arrived. The new ram is exactly the size I wanted and weighs about 1.7kg. The 12oz CO2 bottle had a lengthy delay in customs as the place I bought it from did not include an accurate invoice attached to the outside of the package.
I have been playing around with layouts for the robot and had decided on setting up the buffer the same as in Marauder to save space. This would mean attaching a second fitting onto the side of the fire extinguisher bottle. I tried to order a suitable fitting that I could weld onto the bottle as well as several other bits and pieces from McMaster-Carr but received an e-mail a few days later saying that they are now only accepting orders from their "most valued" customers overseas and that I don't fit into this catagory. I then sent them an abusive e-mail in return and didn't get a reply.
I do however have a brass fitting that is usable and I will play around with that this weekend.
And last of all I have deceided that if Philip is too chicken to try that LiPoly pack in a feather then I will.
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Get Some!!!

Secretary of the Queensland Robotics Sports Club inc.

Please post a piccy of your layout. What force do you expect from your ram?
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So even the rain that falls isn't actually going to fill our dams and our river systems

We are also interested in getting some GB42 gearboxes
we could split shipping?
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Mechanical engineers build weapons, civil engineers build targets

I have got the buffer finnished and the gearboxes have been modified. I am now trying a few layouts:




The plywood shows the rough size that I want to end up with.
_________________
Get Some!!!

Secretary of the Queensland Robotics Sports Club inc.

Started welding up the frame today.

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Get Some!!!

Secretary of the Queensland Robotics Sports Club inc.

thats very nice, a featherweight i presume? kinda reminds of M2 from the UK
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

The last thing we needed up here, another flipper
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https://www.halfdonethings.com/

More welding this weekend. The pneumatic ram and valve mounts are done and some more of the frame.





Total wieght so far = 6.66kg
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Get Some!!!

Secretary of the Queensland Robotics Sports Club inc.

Is it a feather or a lightweight?
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So even the rain that falls isn't actually going to fill our dams and our river systems

As stated earlier in this thread (about the 4th post on this page) this will be a feather-weight.
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Get Some!!!

Secretary of the Queensland Robotics Sports Club inc.