Lakop Posted December 2, 2013 Posted December 2, 2013 (edited) Hi, I just wanted to share this with you all. I made it quickly just to test my servo and building techniques. It's a second prototype. The first build was very heavy, longer and was crunching the gears. This is shorter, nimble and fun to drive. I'll just post one image. See more in my brickshelf. http://www.brickshel...ry.cgi?f=536989 I've had a lot of fun running it around the house. H Edited December 2, 2013 by Horace T Quote
JM1971 Posted December 2, 2013 Posted December 2, 2013 I bet that can pull wheelies, I like this style of construction, all business, sweet. Will be even faster with a AAA battery box Quote
Lakop Posted December 2, 2013 Author Posted December 2, 2013 Hi, Thanks. Actually it can do small wheelies and I managed to get an AAA battery box with my birthday money. I will make some modifications this week with wheelies in mind. Maybe if I move the battery box back a bit. It's all part of adapting to studless and the new techniques. H Quote
Junpei Posted December 2, 2013 Posted December 2, 2013 It's actually really easy to adapt the AAA battery box to studless, put 1x8 technic bricks on the top and bottom and attach thin liftarms connecting them vertically. Then it has odd dimensions and more connection options than the AA batterybox (except there are none on the sides. Also, what's that wheel on the front for? Quote
aol000xw Posted December 3, 2013 Posted December 3, 2013 It's actually really easy to adapt the AAA battery box to studless, put 1x8 technic bricks on the top and bottom and attach thin liftarms connecting them vertically. Then it has odd dimensions and more connection options than the AA batterybox (except there are none on the sides. Also, what's that wheel on the front for? A bumper? Quote
Junpei Posted December 3, 2013 Posted December 3, 2013 Maybe. But it is connected to the servo motor's output... Quote
clarkdef Posted December 3, 2013 Posted December 3, 2013 What's this talk about triple A battery box, was unawares Lego made one... Quote
Lighti Posted December 3, 2013 Posted December 3, 2013 (edited) check this: http://www.bricklink...m.asp?S=88000-1 and there is a rechargeable box as well of similar size, even more lightweight, but hell expensive (since there is a LiPo inside) http://www.bricklink...em.asp?S=8878-1 and the test car is cute, performance should improve with the smaller battery box, and should be even better with the 8878. I think I need to get my hands on a servo motor, too Edited December 3, 2013 by Lighti Quote
MrNumbskull13 Posted December 3, 2013 Posted December 3, 2013 I would love to see a video of this little machine! I think I might get a AAA battery box now, is it really much better though, sacrificing weight for a lower voltage and current output? Quote
JM1971 Posted December 3, 2013 Posted December 3, 2013 I would love to see a video of this little machine! I think I might get a AAA battery box now, is it really much better though, sacrificing weight for a lower voltage and current output? From lego.com 88000 (AAA Box) Holds 6 AAA batteries and delivers up to 800 mA current. You can drive 2 XL Motors or 4 Medium motors together. 8881 Each battery box can power 2 XL-Motors or 4 M-Motors at the same time. It should be the same current and voltage just lasts about half as long, I cant confirm this though. Quote
Lakop Posted December 3, 2013 Author Posted December 3, 2013 A bumper? Correct. I crashed it a couple of times knocking the steering out of alignment, then realised It needed some protection so fitted the small wheel. It's crude but effective. H What's this talk about triple A battery box, was unawares Lego made one... They are in your local lego store. if you can't find any ask the staff. I had a look and did not see any and thought "damn", so I asked and the guy went and had a look and came back with a box full. H I would love to see a video of this little machine! I think I might get a AAA battery box now, is it really much better though, sacrificing weight for a lower voltage and current output? I want to try and fit my little camera to it for video. H check this: http://www.bricklink...m.asp?S=88000-1 and there is a rechargeable box as well of similar size, even more lightweight, but hell expensive (since there is a LiPo inside) http://www.bricklink...em.asp?S=8878-1 and the test car is cute, performance should improve with the smaller battery box, and should be even better with the 8878. I think I need to get my hands on a servo motor, too The servo is great. I can highly recommend one. H On the weight issue, the AA box is heavy but the car handles is very well. I think it's how you mount it. On the first build the battery box was at the back and it did not like it. Then it was on top but I did not like the look of it so on this version I built it around the battery box and i'm surprised by it's performance so far given the weight of the box. It's getting good traction. H Quote
JM1971 Posted December 4, 2013 Posted December 4, 2013 (edited) Horace, you car gave me the idea for a competition thread to build the fastest moc over a distance of 1 or 2 meters (the average distance of a kitchen floor say) There would be no time limit or prize and only standard lego allowed, you would have to upload a video for proof. Edited December 4, 2013 by JM1971 Quote
Lakop Posted December 4, 2013 Author Posted December 4, 2013 Good idea. Today was a perfect day to run my car in the back yard, it's been sunny and dry but the car is in bits awaiting a rebuild with the AAA battery box. Put the idea out to the rest of the forum and Jim. H Quote
MrNumbskull13 Posted December 5, 2013 Posted December 5, 2013 Let me know how the AAA battery box compares to the AA one please! Quote
Lakop Posted December 5, 2013 Author Posted December 5, 2013 Let me know how the AAA battery box compares to the AA one please! What a difference. The car is a lot quicker, I actually struggle to control it as the house was not built for racing technic lego cars. I'm crashing again and flipping the car over such is the speed and weight difference. I will post some more pics asap and try a video, maybe over the weekend. I can highly recommend the AAA box. It's ideal for this sort of model. H Quote
JM1971 Posted December 5, 2013 Posted December 5, 2013 (edited) Let me know how the AAA battery box compares to the AA one please! Same here, I ordered one on tuesday because its needed for quite a few mocs on rebrickable, also I like fast little cars like the Horace test car. Its all about power to weight so its fun experimenting with different motors and gearing. EDIT: Glad to hear its a lot faster. Edited December 5, 2013 by JM1971 Quote
MrNumbskull13 Posted December 6, 2013 Posted December 6, 2013 I think I might get one of these... Quote
JM1971 Posted December 6, 2013 Posted December 6, 2013 My AAA box arrived today, first thing it surprised me how small it is and only weighs 80 grams with batteries inserted compared to the 210 grams AA box. Quote
Lakop Posted December 6, 2013 Author Posted December 6, 2013 I know what you mean. The size surprised me too, they are worth every penny. H Quote
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