11-24-2008, 12:35 PM | #21 |
Rock Stacker Join Date: Oct 2008 Location: South Africa
Posts: 58
| made a platform
made a platform and mounted the 2 motors tonight , the 2 aluminum straps will act as "heat syncs" as well. |
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11-24-2008, 04:21 PM | #22 |
RCC Addict Join Date: Mar 2007 Location: St. Louis (High Ridge)
Posts: 1,279
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as tight as your clapms may be I'd still recomend running a bolt with spacers thru the ears on the ends of the gear boxes to keep them from twisting. wire the motors in series to get to 7.2v. it should help keep them from burning out. |
11-24-2008, 08:18 PM | #23 |
Quarry Creeper Join Date: Jan 2007 Location: Ontario, Canada
Posts: 341
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If you wire them in series itll be like driving with an open center diff.
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11-25-2008, 07:26 PM | #24 |
RCC Addict Join Date: Mar 2007 Location: St. Louis (High Ridge)
Posts: 1,279
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11-25-2008, 07:37 PM | #25 |
RCC Addict Join Date: Sep 2007 Location: Westland, MI
Posts: 1,508
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Go to it man. I see potential. |
11-25-2008, 11:26 PM | #26 |
I wanna be Dave Join Date: Nov 2008 Location: Where freedom is earned.
Posts: 2,011
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Just a little advice,,,, Your lower links should be lower on the axle, and your top links have too much angle. lower the chassis end of the top links and you'll greatly improve your articulation, they are also too short. connect them closer to the "tub" of the chassis. I've built many a full size crawler/buggy, and it's all in the geometry. Google, 4-link calculator, and you'll get the picture. Nice to see you sticking with the effort, definantly out of the box. I'm looking forward to see how it progresses, should be a good learning experience. |
11-26-2008, 03:59 AM | #27 | |
Rock Stacker Join Date: Oct 2008 Location: South Africa
Posts: 58
| yes it does matter , very much in fact Quote:
you are climing a obstical , the front diff gets airborne or gets to slipperly surface as compared to the back , the front wheels start slipping and the rears start loading up in relation to the front , now we have the rears with load and the front with less load , amperage is transfered to the front and they keep on slipping and the rears get less or even nothing , now to get over this obsticle you need the rears to push the fronts forward. what you actually need is a "reverse" circuit whereby the motor with the most load gets the most amperage . A work around for this is to run the motors in parallel so each motor get the same amperage. I can setup a test bench , vid it and post if you guys want ... Last edited by buju; 11-26-2008 at 06:30 AM. | |
11-26-2008, 08:08 AM | #28 |
I wanna be Dave Join Date: Oct 2006 Location: Martinsburg WV
Posts: 2,781
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I have to applaud this effort. It makes me feel good to see someone take the initiative, use whatever they happen to have at hand and make a serious attempt at a build. This project was obviously driven by a lot of desire and determination. Bravo!! Even if the end result is not what some of us here would consider "acceptable", the experience gained through a project like this is invaluable. You're already into the crawling cycle - concieve it, build it, drive it, break it, fix it, improve it, repeat as needed. You're off to a great start IMO. The more time you spend here the more you'll learn... |
11-28-2008, 03:32 PM | #29 |
Rock Stacker Join Date: Oct 2008 Location: South Africa
Posts: 58
| ver 2 |
11-28-2008, 03:34 PM | #30 | |
Rock Stacker Join Date: Oct 2008 Location: South Africa
Posts: 58
| Quote:
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12-02-2008, 12:30 AM | #31 |
I wanna be Dave Join Date: Nov 2008 Location: Where freedom is earned.
Posts: 2,011
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Your main articulation is due to the springs/shocks being mounted closer to the center of the chassis. If you move them further out, you will gain more stability. You don't need that link in the middle either, yank it out and you'll be fine. Leveling your link angles will help it to move up and down as well as "flex"/articulate. With out the shocks it should sag to the ground wit no binding. Keep refinning it, you're learning things fast that take most people YEARS to figure out. And your staying busy instead of playing XBOX and turning into a 30 something loser living in your parents' basement. |
12-02-2008, 03:09 AM | #32 |
Newbie Join Date: Oct 2008 Location: Chicago
Posts: 7
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That's definitely crazy looking. Weird suspension geometry...But if it works, it works.
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12-02-2008, 09:09 AM | #33 |
Rock Stacker Join Date: Nov 2008 Location: charlottesville
Posts: 66
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you never know what works and what doesnt until you try. i applaud the effort he has put forth. where would we be now if no one thought outside the box? ill be waiting on a vid after its completed.
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12-02-2008, 10:46 AM | #34 |
No idea what I'm doing Join Date: Oct 2008 Location: Underground, CO
Posts: 4,529
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I think you chose the wrong screen name......you should call yourself McGyver! I can't wait to see how this turns out for you. Good luck and keep the pictures coming! I'm subsrcibing to this one for sure. |
12-03-2008, 12:50 PM | #35 |
Rock Stacker Join Date: Oct 2008 Location: South Africa
Posts: 58
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quick update , traxas diff installed in the front with drive shaft , still lots more to do... |
12-03-2008, 12:58 PM | #36 |
RCC Addict Join Date: Feb 2008 Location: Hiatus..sutiaH
Posts: 1,620
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Ok, I have held back any negative comments as I don't feel they are needed. I am glad I did because I like what you have made. Good job man - the execution is too original to not like. But what we all are needing is video of it in action. That will dispel all rumors either good or bad. |
12-03-2008, 01:02 PM | #37 |
RCC Addict Join Date: Sep 2007 Location: Westland, MI
Posts: 1,508
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May I make one small recommendation, move the lower ends of the shocks out near the ends of the mounts. It will make for a more stable platform. |
12-04-2008, 08:28 PM | #38 |
Newbie Join Date: Feb 2007 Location: Earth
Posts: 47
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Dude, I love your ingenuity! Post up a vid ASAP!
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12-09-2008, 03:07 AM | #39 |
Rock Stacker Join Date: Oct 2008 Location: South Africa
Posts: 58
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12-11-2008, 02:40 AM | #40 |
Rock Stacker Join Date: Oct 2008 Location: South Africa
Posts: 58
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