JJ2 Posted August 31, 2015 Hello all: For this project I want make a car-truck that has good off road capability but is at a very small scale. Enough "talking" here are the pictures. I have the basic chassis done as of yet, and I plan to use a L-Motor for drive, a M-motor for steering, and a old 9v BB for power. Yes I know that PF parts dont work with 9v parts but I plan to use this method where you bridge the two metal parts with tiny pieces of aluminum foil. I am not happy with the front suspension because I needed to use some gears to center the drive chain The suspension is going to be live axle and probably only have one spring each. I do not know what bodywork I am going to put on it but ALL suggestions are appreciated. Expect more updates soon! Share this post Link to post Share on other sites
A Gallifreyan Cat Posted August 31, 2015 Looks good so far. Hope it turns out well! Share this post Link to post Share on other sites
Technic Jim Posted August 31, 2015 (edited) That is looking really good so far. This MOC looks epic at the moment purely because it is just so small. Also for your 9V to PF conversion you could buy this (http://powerfunction...fault.aspx#8886) conversion cable Edited August 31, 2015 by Technic Jim Share this post Link to post Share on other sites
JJ2 Posted August 31, 2015 Looks good so far. Hope it turns out well! Why thank you That is looking really good so far. This MOC looks epic at the moment purely because it is just so small. Also for your 9V to PF conversion you could buy this (http://powerfunction...fault.aspx#8886) conversion cable I have three of http://powerfunction...fault.aspx#8886 but they dont make 9v battery boxes work directly with PF receivers without modding the wires or using an empty battery box. shown in Sheepo's video Share this post Link to post Share on other sites
Zerobricks Posted August 31, 2015 Only thing I would change is the use of the pair of 8 tooth gears, those are rather inefficient. Share this post Link to post Share on other sites
JJ2 Posted August 31, 2015 Only thing I would change is the use of the pair of 8 tooth gears, those are rather inefficient. I know I am planning to change that but I cant figure out how to get a 9 stud wide driven-steered axle. Have any ideas? Share this post Link to post Share on other sites
Pego Posted August 31, 2015 I know I am planning to change that but I cant figure out how to get a 9 stud wide driven-steered axle. Have any ideas? Well, if its going to have live axles you could try offsetting the whole driveshaft by one stud, it shoudn't affect anything Share this post Link to post Share on other sites
Kristof Posted August 31, 2015 Quite ambitious regarding the scale. I'm not very skilled in building technic vehicles so I can hardly make any suggestions - all I can do is to wish you good luck. I hope you succeed! Share this post Link to post Share on other sites
Rockbrick Posted September 1, 2015 (edited) I would try to use two centre differentials - longitudonally set - the left one would be between the left wheels and the right between the right wheels Edited September 1, 2015 by Rockbrick Share this post Link to post Share on other sites
JJ2 Posted September 1, 2015 (edited) I would try to use two centre differentials - longitudonally set - the left one would be between the left wheels and the right between the right wheels I could try that but the differentials will eat up way to much space in the chassis. No Diffs? No Ackermann? No soup for you! I guess I get no soup! Edited September 1, 2015 by JJ2 Share this post Link to post Share on other sites
Rockbrick Posted September 2, 2015 I could try that but the differentials will eat up way to much space in the chassis. No Diffs? No Ackermann? No soup for you! I guess I get no soup! depends on the diffs the lower profile none-bevelled ones may fit but would make the body too long for us city slickers diffs are more of anecessity as no grass or soil to off road and allow wheel slip at home the need for diffs is greater on polished floors Share this post Link to post Share on other sites
Sylvian Posted September 2, 2015 Like Pego said, why not offset the centre axle? Its not uncommon on real vehicles either. I like what you have so far. Offsetting the centre doesnt even seem to me as a compromise. Good luck! Share this post Link to post Share on other sites
JJ2 Posted September 2, 2015 UPDATE! I'll call this the suspension update. I made the front suspension first. It uses two rubber bands one for left and one for left for the "spring". To keep the suspension stable there are two vertical axles (the DBG and dark tan axles with stop) connected to These that can move independently to the rest of the chassis. Right now it is (correct me it I'm wrong) Pushrod steering using the flex system threw and pin hole and it is going to be power by a gear rack in the "body" of the car. The rear suspension is basically the same thing without steering and a single rubber band. The Drive-Chain is just some simple U-Joints. Again All comments and suggestions are appreciated All pictures are on my Bricksafe account. It did end up longer than I wanted it, and with more unused space than I wanted it to but that is subject to change. Stay tuned for more updates! Share this post Link to post Share on other sites
Pego Posted September 2, 2015 Looking really good so far, but you must reinforce the axle that goes into the front axle, because it won't stay in there under even low torque, like driving around a flat surface Share this post Link to post Share on other sites
JJ2 Posted September 2, 2015 Looking really good so far, but you must reinforce the axle that goes into the front axle, because it won't stay in there under even low torque, like driving around a flat surface I know I'm working on that... If I use the Kragle on it is it a 100% Lego solution? Share this post Link to post Share on other sites
Pego Posted September 2, 2015 I know I'm working on that... If I use the Kragle on it is it a 100% Lego solution? I wouldn't glue them together (if that is what you meant), they could still separate. If you have 2 more of the new u-joints you can use a half bush and some thin liftarm without making the chassis longer Share this post Link to post Share on other sites
Block_Smarts Lego Technic Posted September 2, 2015 Its looking good so far, Just need to reinforce that U joint! Share this post Link to post Share on other sites
JJ2 Posted September 2, 2015 (edited) If you have 2 more of the new u-joints you can use a half bush and some thin liftarm without making the chassis longer I did that with a 4L and 3L U-joint and it worked for a short time. When I was testing the drive chain by holding the wheels to see how strong it was and the U-joint broke Edited July 1, 2016 by JJ2 Share this post Link to post Share on other sites
Pego Posted September 2, 2015 Did the plastic break completely? I haven't seen that before Share this post Link to post Share on other sites
JJ2 Posted September 2, 2015 No just the two half's I think it is reparable Share this post Link to post Share on other sites
JJ2 Posted July 1, 2016 After a long rest period I finally got around to finishing this project. I pretty much scrapped the old design except the basic front axle but used the 42000 hubs on it, it is driven and steered by two M-motors, powered by an old 9v battery, and now uses an Sbrick. IMG_0630 by JJ2Sam, on Flickr The cab was roughly modeled after an unimog's cab and I made it a trash truck to hide all the ugly electronics parts that would have otherwise looked bad, I don't know if the trash made it look better though . IMG_0634 by JJ2Sam, on Flickr The drive chain is offset and has a small gear ratio (I could not fit one) The suspension is floating axle and the rear uses a rubber band and the front uses a dissembled spring and a rubber band. It ended out as a quite hard suspension which fits the type of vehicle it was modeled after so I am happy about that. IMG_0632 by JJ2Sam, on Flickr IMG_0633 by JJ2Sam, on Flickr IMG_0631 by JJ2Sam, on Flickr This might be the smallest lego 4x4 with steering and suspension ever made but I will not make any claims. There will be a video but in a few days, All pictures are on my Flickr account Thanks for reading JJ2 Share this post Link to post Share on other sites
Lego2016Lego Posted July 1, 2016 Look at the one I am making http://www.eurobricks.com/forum/index.php?showtopic=136710 Share this post Link to post Share on other sites
Pego Posted July 1, 2016 Very very cool! I too think it may be the smallest one yet, can we have a video? Share this post Link to post Share on other sites
JJ2 Posted July 2, 2016 Very very cool! I too think it may be the smallest one yet, can we have a video? Thanks the video will be made today or tomorrow. Share this post Link to post Share on other sites
