199 replies to this topic

[stjobe]

Keisuke Nagisa, on 14 February 2013 - 02:22 PM, said:

Thats an unseen locust. I posted a reseen locust.

I posted an original BattleTech lineart of a Locust, as seen in TRO: 3025. You posted an abomination that should never have seen the light of day.

Also, I don't care much what you think is allowed or not.

Edited by stjobe, 14 February 2013 - 02:40 PM.

[Skadi]

Using a Engine, preferably in the 300 range so it goes fast.

[Gorthaur]

Kerensky The Last Mechbender, on 13 February 2013 - 02:56 PM, said:

Reverse legged mechs don't make sense to me I drew a helpful diagram here it is:

http://imgur.com/vWc1iEt


How do mechs walk what does what and where are their parts? I don't get it it's like, how do they move anywhere instead of just up and falling on their faces? It doesn't make sense to me maybe gyros??

Someone correct me if I am wrong, but isn't something more like this? This would be like a timberwolf leg or something.



And I do believe 'Mechs use gyros to help balance. I remember reading about 'Mechs being off balanced by gyro damage in a few of the novels.

Edited by Gorthaur, 14 February 2013 - 02:45 PM.

[Jericho917]

Notice the reversed legs like a dog... and its REAL! Space magic my ***....

[INSEkT L0GIC]

Needs more AT-ST love in here.

[Knobby]

Keisuke Nagisa, on 14 February 2013 - 01:57 PM, said:

Ok Again for the people that are not getting it:

Red = Hip
Green = Knee
Blue = ankle
Black = toe
Yellow = weird extendo leg

This is our base. This is what evolution has deemed the best setup for maximum speed and acceleration.


This is a crab. It clearly has no knee's. What it does have (and other mechs look like they may have) is the ability to extend its foot like a hydraulic, making up for the movement it loses by having no knee.


This is a locust. You can see it also has no knee. The protrusion out the back of its ankle look like it may have to ability to extend its foot. A lot of "no knee" mechs have similar protrusions.


This is a catapult. This is one of the mechs that seem to have its joints reversed (that or is has an extra bone above the femur). As far as I know there are no examples in nature illustrating whether or not this design would be effective.


Now This is a recent mech design, an SC Wight. This is what a mech with bird like legs should look like, and what most recent mechs with this leg design look like. In this picture of it running you can clearly see how much more force it would be able to creat by pushing its leg back and extending it other leg forward for long sprinting strides.


If you watch this madcat running video you can see it doesn't so much run as it hops from leg to leg. Balance would be an issue in a design like this.


Now a mech COULD walk without knees like the ones pictured but it would not be very efficient and running would be hard.

/thread

Jericho917, on 14 February 2013 - 02:44 PM, said:

Notice the reversed legs like a dog... and its REAL! Space magic my ***....

learn to count, robot dog hind leg still has the exact same bone configuration as the bird in Keisuke's post

[Django Jr]

Colonel Pada Vinson, on 13 February 2013 - 03:02 PM, said:

They cant!

Bees can't fly either aparently.

It is well-known that a scientist (supposedly) once said that physics (or science) shows that a bee can't fly (or maybe that a fly can't be?). Bees do fly, by the way. This is a popular example of how stupid scientists can be. It is hard to disagree with that. There is some small amount of truth to the statement that a bee can't fly (see addendum, below). But, the statement demands to be misinterpreted, and that is far from being scientific.

Physicists sometimes derive equations that apply to airplanes. An airplane the size and shape of a bee could not fly. In other words, the wings of a bee cannot support the bee at the speeds that a bee normally flies, if the wings are held out motionless. Perhaps this hypothetical bee is being propelled by a tiny propeller on its nose. Well, such a bee would drop from the sky like a bee with stiff wings and a propeller on its nose. By the same equations, a helicopter cannot fly either.

What keeps an aircraft aloft is not forward speed, but rather the motion of air over, and under, the wings. Forward motion keeps air moving over an airplane's wings. But, against a strong head wind, an airplane can even remain aloft while flying backwards. The bee's (and the helicopter's) wings are not motionless, the wings themselves move (very rapidly) in order to make the air pass over the wings. Bees and helicopters (and hummingbirds) are famous for hovering motionless, because of this.

A real scientist would say that a bee can't glide. But wait, if he were going about 100 mi/hr ... never mind.

A scientist would never say such a thing (or lose every credibility), as bees flying can be observed. If he said something similar, probably it was about science not being able explain how they do it (in the meantime they found the answer btw.).

Everybody knows that some people are unable to understand the simplest scientific text.This is a popular example of how stupid those people can be. It is hard to disagree with that.

Edited by Django Jr, 14 February 2013 - 07:39 PM.

[Taurick]

Ostriches seem to manage alright

Edited by Taurich, 14 February 2013 - 07:19 PM.

[lizardmech]

I'm not sure that there is even an issue with the reverse knee mechs to begin with, as long as they have a ball type joint in the hip they can walk. It's not really that useful to compare them to animals to begin with. Nature is terrible at producing durable joints and secondly most animals prioritize energy conservation over almost everything else. In comparison it would hardly matter at all if a battlemech was constantly using energy to maintain its strange squat stance. Likewise using fewer joints may be preferable on a machine for repair and maintinance reasons. Mechanical joints don't have to be made out of living tissue and constantly supplied with blood.

[urmamasllama]

stjobe, on 14 February 2013 - 12:38 PM, said:

Bah, who needs more than one joint anyway?



Although having some can make you go faster (18 mph is the new speed record for robots):



Ah, Boston Dynamics.... They do some really cool stuff:



Although they're a bit more serious than these guys:

http://www.youtube.c...1&v=WTHI8o5ZOFk

(how many joints was that on each leg? Two?)

those videos are old they have a newer version of the cheeta now that will go 30
they have also updated the petman-atlas since that video and its crazy scary what it can do

Edited by urmamasllama, 14 February 2013 - 09:30 PM.

[Bishop Steiner]

lizardmech, on 14 February 2013 - 09:13 PM, said:

I'm not sure that there is even an issue with the reverse knee mechs to begin with, as long as they have a ball type joint in the hip they can walk. It's not really that useful to compare them to animals to begin with. Nature is terrible at producing durable joints and secondly most animals prioritize energy conservation over almost everything else. In comparison it would hardly matter at all if a battlemech was constantly using energy to maintain its strange squat stance. Likewise using fewer joints may be preferable on a machine for repair and maintinance reasons. Mechanical joints don't have to be made out of living tissue and constantly supplied with blood.

I think the entire field of biomimetics would say otherwise. Most of our most efficient breakthroughs in mechanical engineering has been by studying and mimicing these horrible designs. (Birds running 45 mph and cats running 75 mph are such horribly poor designs, since our most advanced robot runners pull what... 18 mph?).

[yashmack]

On the topic of whether or not a battle mech would be effective on the battlefield, i dont think it will really matter
once we can make giant walking robots, we will, we have seen them for far too long in our popular media for us NOT to make one

stjobe, on 14 February 2013 - 12:38 PM, said:

Although they're a bit more serious than these guys:

http://www.youtube.c...1&v=WTHI8o5ZOFk

(how many joints was that on each leg? Two?)

ROFLMAO
it would appear that walking spider mech from burning man has a large retractable ***** under its chassis XD
and since the forum likes to sensor out perfectly innocent words... that would be the male sexual reproductive organ that dangles between one's legs

Edited by yashmack, 14 February 2013 - 10:27 PM.

[Django Jr]

urmamasllama, on 14 February 2013 - 09:30 PM, said:

those videos are old they have a newer version of the cheeta now that will go 30
they have also updated the petman-atlas since that video and its crazy scary what it can do

You mean this one?

Edited by Django Jr, 14 February 2013 - 10:56 PM.

[Jack Corban]

PythonCPT, on 13 February 2013 - 03:07 PM, said:

Yea how do they walk?
and for that matter...

[REDACTED] magnets man.... How do they work?

MMFCL from germany my brother.

[Alois Hammer]

11 pages and still going. Only one thing to say about that:

Successful troll is successful.

[Vanguard319]

In regards to the square cube law, a machine has ways to counteract the law. For example, you can build your robot with a significant amount of hollow space. (Square Cube law generally assumes the volume is a solid mass.) In regards to battlemechs, they use fusion reactors in place of say diesel turbines, so you have alot of power, very little fuel mass, and lower weight. We can assume that myomer, like real muscle tissue, plays some role in shock absorbtion, reducing the total weight of suspension. This leaves plenty of weight left over for weapons, armor, and munitions.

As long as you can build it in regards to available power supply and within weight restrictions, it is certainly possible to build a giant robot.

[Kerensky The Last Mechbender]

wow jeez guys it looks like this turned into kind of a big thing overnight here, there's inventioneers and science doctors everywhere talking about triangle cubes and the law and all sorts of things. Anyway robots walking around isn't really a big huge deal I guess and let's just say that this guy

Pihb, on 14 February 2013 - 10:38 AM, said:

This is a start. Do your own research from now on. http://en.wikipedia..../Humanoid_robot

is right and we can all move on??

[Broceratops]

how come it says this thread was started by "bonelord420"? i wanted to come in here and asked him if anyone ever called him the ***** lord.


edit:

crap it was ALREADY bonerlord420.

Edited by Broceratops, 16 February 2013 - 04:11 PM.

[RagingOyster]

How does a computer work? Why is light a particle and a wave? How did cavemen build Stonehenge?

's called PFM dude. Learn to love it, because it is everywhere.

[Pihb]

RagingOyster, on 16 February 2013 - 04:13 PM, said:

How does a computer work? Why is light a particle and a wave? How did cavemen build Stonehenge?

's called PFM dude. Learn to love it, because it is everywhere.

I just wish morning wood could be explained...