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Messages - MikeNCR
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221
« on: September 24, 2012, 09:21:47 PM »
222
« on: September 13, 2012, 07:25:28 PM »
Crosspost from discussion-
Looks like a solid concept. Make sure to doublecheck battery thickness vs. vertical space in the chassis, it's easy to miss by just a hair and have it mess with the whole internal layout.
I'd also suggest once you get the parts, cut out thin cardboard mock ups of the armor to do a final fit test before you cut metal. It's also not totally obvious how the armor fastens together while allowing battery removal, so that's something to think about while the parts are on the way.
223
« on: September 13, 2012, 07:23:49 PM »
Looks like a solid concept. Make sure to doublecheck battery thickness vs. vertical space in the chassis, it's easy to miss by just a hair and have it mess with the whole internal layout.
I'd also suggest once you get the parts, cut out thin cardboard mock ups of the armor to do a final fit test before you cut metal. It's also not totally obvious how the armor fastens together while allowing battery removal, so that's something to think about while the parts are on the way.
224
« on: September 05, 2012, 08:03:39 PM »
You do know that your friends bot is the first sucessful american front hinged fipper right?
If that's true, it's absolutely hilarious, seeing as the bot was mostly built from recycled bits of old bots (including Kobalos, Motor City Massacre and the 2nd Apollyon) and scrap metal. Can anyone think of any US front hinged bots that have done well?
225
« on: September 05, 2012, 06:51:20 PM »
Congratz on all the victories, sounds like it was all quite successful.
Glad to hear of the flipper's victory, hopefully that might inspire some more robots over there to utilize the supreme weapon :P
You do realize that the class the flipper was in fights on a platform at Dragon*con, right?
I wish you guys would chill out about a sarcastic comment :P
According to the videos actually, Mike's 1lb flipper actually fought in a battlebox though, so not on a platform. On the subject of the flipper, I'm quite impressed with the driving for a new roboteer. I'm also really impressed with how well Nyx works. I was at first quite skeptical about how effective the weapon would be, but it seems to be very useful for controlling the other robots with.
There is a pushout on the insect box, but compared to the rest of the arena, it's a fairly small area. John (driver/co-builder of Reptar) picked up bot driving fast, which I can only assume is somewhat related to how often he plays video games. (serious correlation there from what I've seen) Once I got the hang of using the spike even I was shocked at how well it worked. It seems to be just the right length to pop the other bot up on/near their side, and then it works as a catch stick to keep them there as I floor it toward the wall/edge of the floor.
226
« on: September 04, 2012, 03:59:59 PM »
227
« on: September 03, 2012, 06:24:22 PM »
Video coming later, but here's a very brief rundown of how the bots did
Klazo went out in the first round via pushout
Algos placed 3rd.
The flipper under the name Reptar to go with my friends Chuckie costume at Dragon*Con won the 1lb class.
Apollyon went undefeated and won the 12lb class.
Nyx lost it's first match, then went on to win the 30lb class.
We got a ton of video which will be showing up once it's ID'd and converted to a smaller/faster to upload format.
228
« on: August 25, 2012, 06:25:09 PM »
Here's the full fleet for Dragon*Con 2012: 
229
« on: August 24, 2012, 05:42:13 AM »
Without sounding like I'm making an RA2 pun, is the front-hinged flipper wedgy enough? I always wonder about those types with the entire front panel as a front-hinged flipper... (totally didn't misspell that as slipper just now...)
It seems to sit pretty flat. With the whole real world thing, the floors are never perfect, so once you get them to a certain level of flatness, it's really more down to that exact bit of floor than either wedge.
230
« on: August 23, 2012, 10:53:49 PM »
The flipper on the new bot is servo powered. It actually uses a mechanism very much like the one on Biohazard, except it's using a different piece of the linkage as the weapon surface. (4-bar lifter) Here's the 1lb fleet for Dragon*Con next weekend. Full group shot coming soonish. 
231
« on: August 22, 2012, 10:34:33 PM »
It seems to work pretty well for a bot that wasn't really properly designed outside of the general concept. Flipper works and has plenty of power, travel range is enough that it can self right, and it was mostly built out of random scrap material including portions of Kobalos, Motor City Massacre, and the second version of Apollyon.
232
« on: August 22, 2012, 10:13:08 PM »
New addition to the team:  1lb front hinged flipper. This bot was mostly built by a friend of mine with my role being direction and complicated components, as they were learning how to use many of the tools during the build process. It will debut at Dragon*Con 2012.
233
« on: July 28, 2012, 04:07:00 PM »
You did see that there were two bots in the .rar I sent you, right?
234
« on: July 28, 2012, 12:26:57 PM »
Have you decided what, if any, AI parts are legal for the IRL HW's?
236
« on: July 23, 2012, 01:47:30 PM »
Lol.. I've been here over 3 years and I think I've never heard of TDS... 
TDS hasn't really been around since before AceUplink went away. There aren't all that many active people left from the AU/RA2 forums days.
238
« on: July 19, 2012, 03:25:26 PM »
LW built, debating between 3 different HW's.
239
« on: July 18, 2012, 10:43:07 PM »
The bigger it is the harder it hits right?
Rotational kinetic energy is 0.5*(moment of inertia)*(Angular Velocity^2)
What that means is doubling MOI doubles energy, doubling angular velocity quadruples energy. I'm personally a fan of the compact, dense drum geared for high rpm, but both have their benefits.
Exactly.
My reasons for using a large drum rather than a small are three-fold. 1. It looks awesome. 2. As you said, 24" drum spinning at 1000 RPM has twice the power as a 12" drum spinning at 2000 RPM. This way I can take advantage of using a brushless motor designed for 1/5th scale RC car electric conversions (at least until I upgrade to a PERM PMG-132) without worrying about whether it can keep up the massive RPMs needed for an effective drum. 3. Smaller drums don't seem to have that killer uppercut I'm looking for.
That's not quite an accurate reading of what I said. For the sake of simplicity, let's pretend that the 24" drum has exactly twice the MOI of the 12" drum. We'll call them 1 and 2, since it doesn't really matter as energy is linear for MOI increases. We'll say the big drum is at 2500rpm, little drum is at 5000rpm 5000rpm gives an angular velocity of 523.6 radians per second 2500rpm gives an angular velocity of 261.8 radians per second So, for the 24" drum, you have (0.5)(2)(261.8^2), which is 68,539J So, for the 12" drum, you have (0.5)(1)(523.6^2), which is 137,078J Those numbers are way, way high, as the MOI would be lower in reality, but for illustrative purposes it works. This is why there's been a trend recently to spin a lighter single toothed disk/bar/etc at a much higher speed for spinning weapons.
240
« on: July 18, 2012, 09:34:50 PM »
The bigger it is the harder it hits right?
Rotational kinetic energy is 0.5*(moment of inertia)*(Angular Velocity^2) What that means is doubling MOI doubles energy, doubling angular velocity quadruples energy. I'm personally a fan of the compact, dense drum geared for high rpm, but both have their benefits.
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