Gehenna 2

Name: Son of Ripper 0.2 (SoR)
Shape: In the shape of SABotage with rounded back
Weapons: A long-lasting back-hinged flipper with titanium flipping plate for flipping ease (Can also self-right robot) And a rear y-axis titanium spinning BAR weighing 6 kg and running at 4000 rpm. Powered by a C40-300 at 36 volts (~7.6 hp) Giving a good all-round attack (Bar) and defence (Flipper) mechanism
Armour: 4mm thick armour around robot with steel chassis and hardox wheel guard bars
Dimensions (L x W x H): 75cm x 55cm x 20cm
SRIMECH: Can run invertible but mainly self-rights with flipper (Like ThermidorII)
Strength: Very fast and manuvarible
Weakness: Not fantastic pushing power
Colour: Black with red SoR on the front flipper
Weight: Approximately 100kg
Speed: 12mph - 15mph max speed
Turning Circle: 0 with 2 wheel drive tank style steering
Ground Clearance: 0 at front and leading up to 1cm at the back and sides
Wheels: 2 Foam filled wheels that each have a hardox bar protecting it (Wheels can run invertible
Power: Just basic NiMh batteries driving 2x S28-150 MagMotors with 4QD speed controling
Notes: Long-lasting but powerful flipper

SOR 3.5

Shape: It’s still that box-wedge style design with the front wedge going at around 60*. On the front wedge there is also a steel strip to help sliding under robots and guiding them onto the flipper the strip is also extended horizontally 10mm to form a small nose to help slide under robots. The side wheel guards and rear are a bit hard to describe so you’ll have to look at the picture on my website.
Motivation: Two foam filled wheels weighing around 1kg each, because they are on the outside of the robot then they each have a bar protecting it made up of 3.35mm Hardox. They extend out so that under no circumstances what-so-ever can a disc get to them! The wheels are slightly higher than the body so that it can run inverted once flipped as well as driving around normally.
Weight: Somewhere around 100kg, I’m guessing I’m in the weight limit
Ground Clearance: 0mm on the front wedge with around 10mm around the wheels and 15mm at the back.
Weapon: The weaponry is slightly changed this time, the first being the central flipping arm in a similar style to Cassius; therefore its front hinged. It runs up the front wedge and up across the top surface of the robot. Its powered by a 120mm bore ram pumped with CO2 gas at 145psi, contained in a 2.2kg canister. There is also a 1.1kg buffer tank to help make the flips much faster. This will give me just around 25 flips per fight.
At the rear again there is the Y-Axis (vertical) spinning bar weighing around 6kg, its now powered by a LEM130 Lynch Motor on 36v giving around 9hp, that is around 1.4hp more than last time. The blade is also reshaped to give more momentum while spinning and to cause even more damage. Now the front hinged flipper means it won’t flip itself into the bar while trying to self-right.
SRIMECH: The flipper can self-right the robot most of the time, the angles on the front rear and sides make it hard to rest it there. The invertibility means it can drive out of sticky situations once flipped and still get around if I ever run out of gas. But its pretty much passive once inverted so I like to self-right as soon as possible.
Drive: Each wheel has an S28-150 Magmotor powering it, giving around 13mph but not fantastic pushing power (Only around 6hp) the whole system is run on 24v and the motors are powered by NiMH packs running on 24v. This time the motors have aluminium covers over the top of them to stop any overheating, it also acts as s bit or protection to stop bits getting inside and to stop them being shaken around a bit. There are also some more sections added to the hull made of Aluminium 6061 with drilled sections that should keep the motors cool for definite.
Turning Circle: With the two-wheel drive I can easily spin on the spot and with the wheels being positioned towards the centre I can keep the front or rear facing the opponent quite well.
Armour: There are some major changes to the armour this time, the base-plate in now constructed from 5mm thick Grade 5 Titanium. The wheel guards are made of 3.35mm Hardox, to keep the weight down it has 30mm holes drilled into it to keep the weight down. But now the rest of the robot is first covered with 3mm thick Grade 5 Titanium and then on top of that another layer of 7mm thick Aluminium 6061, its all light stuff so I’m in the limit. The armour should prove fairly difficult to penetrate with an axe or crusher and if a disc hits it then it will only peel away at the top sheet first, hopefully any impacts will be absorbed through the 1cm thick combined sheets though.
Notes: I’d like to thank Aaron and Nick for helping me out on this robot
Strength: Good all rounder, good weaponry, armour and drive
Weakness: High ground clearance, doesn’t do that well in a pushing match

Name: SOR 5.0
Shape: Tall box shape with a front wedge and sloped sides. The sides are also skirted and the front wedge has a Firestorm style ‘wedge extender’.
Colour: Light grey with a dark grey flipper and SOR across the front in red.
Dimensions: 700mm x 800mm x 200mm (Length x Width x Height)
Weight: +/- 100kgs (Unsure of the actual weight at the moment)
Motivation: Two CNC Aluminum wheels with holes for weight reducing. There are two choices of tyre that can be used on the edge of these wheels. The first choice are bonded with Vulkalon rubber for superb grip on metal surfaces. The second choice are made with standard rubber with small screws poking out for extra grip on wooden surfaces.
Power: Each wheel is driven by an LEM130 motor. I chose these for two reasons, the first reason being the S28-150’s weren’t up to the job and were lacking in the power department. The second reason was their great power to weight ratio was perfect for what SOR wanted. More power for a weight only around a kilo heavier than before. The motors are run at 36v providing decent speed and torque and not going overkill on battery weight.
Speed: 12mph, for a decent running speed and great acceleration.
Turning Circle: 0, with tank style steering.
Ground Clearance: 1mm under the front wedge and 10mm elsewhere. However the front wedge extender and the skirts mean SOR now has a 0mm ground clearance all the way round (other than the back, but that has the disc).
Skirting: 4mm thick Titanium/Vanadium, hinged to the body with a rotary joint.
Armour: 3.25mm thick Hardox monocoque.
Weapon: The usual rear hinged flipping arm at the front that goes across the top and then down the front wedge and finally forming a horizontal Bigger Brother like flipping platform (only the width of the front). This is powered by an 80mm bore ram and CO2 at 145psi contained in two 2.2kg canisters giving over 30 flips in a fight. At the rear there has been a bit of a modification. The rear spinning weapon remains, only this time it is a Hardox horizontal spinning bar. This is powered by an S28-400 Magmotor at 24v.
SRIMECH: Invertible and the flipper can self right it.
Strengths: Compact, powerful, manoeuvrable, low clearance, tough armouring, decent weapons, can self right and work inverted. A great all rounder basically.

Name: SOR Hex
Shape: Box-wedge shape with sloped sides. These wedges are all angled at 45 degrees to give maximum protection against spinning weapons. If you are unsure, please check the render. The front wedge has a small ‘nose’ on it which scrapes along the surface.
Length: 700mm
Width: 800mm
Height: 200mm
Weight: 100kgs (but should be under)
Drive: Two aluminium wheels coated in Vulkalon for added grip on the arena surface. These are driven by two LEM130 motors at 36v, provided by 90x 3000mAh NiCad packs. This gives a reasonable amount of push, certainly enough to drive at and under other bots.
Speed: 12mph
Ground Clearance: 0mm at the front wedge and 10mm elsewhere. The front also has a ‘nose’ on it that sits flush to the ground and the sides are skirted, which effectively means 0mm at the front and sides.
Armour: 4mm thick Hardox all over, other than the skirting and nose which are 3mm Titanium.
Weapon: The main weapon is a central rear hinged flipping arm, which runs across the top of the robot and down the front wedge. This is powered by a 80mm bore 100 stroke ram fed with CO2 at 145psi. There is around 4.5kgs worth of gas on board which gives multiple flips during a match. It’s designed to be long lasting rather than to throw people all over the place. For protection at the rear, there are now interchangeable weapons:
1) A 10kg Horizontal spinning bar driven by an S28-400 Magmotor at 24v. This is spun at 2000rpm and gives off around 10kJ per hit. This is the default set-up and should be used if I don’t state what rear set-up to use.
2) The classic SOR saw blade as in the original version. It weighs around 2kgs and is placed vertically at the rear. It is driven by an S28-400 Magmotor at 24v and spins at around 3000rpm. It is styled like the blade on Pussycat.
3) A 10kg Vertical spinning bar driven by an S28-400 Magmotor at 24v. This is spun at 2000rpm and gives off around 10kJ per hit. This gives the ability to flick robots upwards but slightly hinders my own self-righting ability.
4) The whole rear weapon set up is removed and replaced with a new spinner killer plate. It is made of 6mm thick Hardox and angled at 45 degrees effectively turning SOR into a truncated pyramid shape. I can face this plate towards spinners and use it as a method of taking the hits. Then, with the spinner slowed, I can spin round, get the flipper under and throw it over.
Notes: Can run inverted and self-right using the flipper.

Weight Check (for standard set-up):

Wheels ~ 6kgs
Motors ~ 10kgs
Batteries ~ 15kgs
Pneumatics ~10kgs
Bar ~ 10kgs
Skirts ~ 1kgs
Armour ~ 40kgs

Which leaves about 8kgs for whatever is left. Thanks to Kody and Martijn for the armour and skirting calculations.

Name: Gehenna
Weight: 100kgs
Shape: A low to the ground wedge shape, with sloping sides and rear.
Colour: Black bodywork with a dark blue flipper.
Length: 800mm
Width: 800mm
Height: 200mm
Motivation: Two 150mm diameter 30mm wide wheels made of Aluminium 7075. Each wheel has an Asmaprene urethane rubber tyre for extra grip on the arena floor.
Drive: 2x S28-400 Magmotors running at 26.4v from 40x A123 Lithium-Ion cells.
Turning Circle: 0mm using a tank style steer.
Speed: 15mph
Ground Clearance: 0mm at the front and variable leading to 10mm at the rear.
Armour: The wedge is made of an 8mm Titanium/Vanadium alloy. The sides, rear and base are all 6mm Titanium/Vanadium. The flipper itself is made of 4mm Hardox.
Weapons: The main weapon is a front-hinged flipper, like Firestorm and Envy. It is operated by an 80mm bore 100mm stroke ram. This is run at 145psi on CO2 and the gas is stored in a 2.2kgs canister. This should provide plenty of quick and powerful flips. The flipping plate has an edge to stop robots driving up and over the wedge shape. The secondary weapon is at the rear - it is a 650mm diameter horizontal spinning bar with a 2kg weight at each end. It is powered by an S28-400 Magmotor and spins at 2450rpm from a 2:1 ratio. It weighs 10kgs and is capable of dishing out 22kJ.
Self-Righter: The flipper is used to self-right Gehenna. The sloping panels mean that it always lands on the flipper if inverted.
Notes: Thanks to Joey for his help.