mihai_9600

Have you matched the speed of the tracks with the speed of the front wheels? This seems quite complicated to me as you have different motors and different wheels diameter.

Very nice! What's the usual length of the flex axles used for a leaf spring suspension? I would like to buy some of them and don't know which size.

Thank you both for your answers. I'll better buy a Sbrick than another servo motor.

Hi, I am wondering if, using the Sbrick, an M motor can be used for steering without any gear reduction. Can the Sbrick output a predefined voltage when pressing a button? I installed the Sbrick app on my phone but without the Sbrick there is nothing much to configure... Thanks!

You should look for a 9398 in your country. Maybe some kid got bored of it...

http://www.argos.co....ber/3858194.htm £170 -> £115

Yes, LOL indeed. There was also the crane alone for sale, some time ago. I will do the same if I will get this set :D

I don't think LEGO prepares all B-models for PF, especially if the set doesn't include the PF parts. Maybe you can get some inspiration from the A-model. Don't forget to use the white clutch gear.

Do you maybe have a link with all the contestants? I would like to see more ideas for this building scale.

I built this axle and it is really cool. Thanks D3K!! I recommend using the 5x11 frame for easier integration into the vehicle frame.

How are you steering with only 1 motor? I think you can build a substractor with pieces from 42030 - there are 2 diffs and of course 2 other motors apart from the XL.

Just wondering why this type of machine is called crawler crane and not tracked crane...

Try this, the ldd is somewhere lower together with the video: http://www.eurobricks.com/forum/index.php?showtopic=98458&hl=%2Bmini+%2Btatra I also tried to build a mini tatra with 49.5 wheels and the main problem was the steering. Also the 6.5 shock absorbers are pretty large for this scale, although the suspension performed overall well. Maybe some rubber bands are more appropriate, but I had no inspiration for them.

Thank you for fixing the text issue I suggested you after the first batch of reviews. It's much better now :)

Sariel, one suggestion from me for your reviews. Sometimes you are using the same text for several scenes, sometimes you have different text for each new scene. This makes me feel like I am missing the text change and I have to move my sight from the beautiful images to the bottom of the video. Maybe you could signal somehow the text change, like a fade in/out effect or slightly different color of text.

Hi, BlindBuilder, I will try to explain you with words how to assemble the hubs for the 9398 crawler. I don’t own this set but the building instructions are pretty clear for me. I hope I will be helpful to you. First you need to select the needed parts and put them apart. You will need: 1 x 92908c01 (I assume you already inserted the hub in the portal) 2x 92907 (Axle and Pin Connector Perpendicular Split) 1 of the following pairs of gears, depending on your desired ratio: 8t and 24t; 12t and 20t; 2x 16t 1x axle 4 with stop 1x axle 3 2x axle 2 notched 2x frictionless pin Building steps: I will call the position of the hub of the 92908c01 as bottom left. Insert the larger gear in the frame, bottom position. Push the axle 4 through the hole at bottom right. Now the hub should rotate together with the larger gear. Insert the smaller gear in the upper position of the frame and the push the axle 3 through the whole at top right. If you rotate the small gear, the hub should also rotate. Now the 92907 connector: I will call the position of its only round hole as bottom right, if you pass an imaginary axle vertical through it. On the left side you will have 2 pairs of axle holes, one top and one bottom. Next, embrace the top right corner of the portal hub with the left side of the 92907 connector. Its round whole must be still in bottom right position. Then insert an axle 2 through the bottom left hole of the 92907 connector. The portal and the connector should stay together now. Finally, insert the frictionless pin in the round hole of the connector, coming from top. The whole assembly will rotate when steered around the axle of the pin you inserted. Just below the 92907 connector is the hole through which you pushed the axle 3. This hole is a bit wider and can accommodate 1 stud of the 3L u-joint. This means that the joint of the u-joint is on the same axle as the frictionless pin. Connect the second 92907 connector in the bottom right position of the portal hub, but with the round hole up, not down as the first connector. Insert the second axle 2 through the bottom hole of the connector. Insert a frictionless pin in the round hole of the connector, coming from bottom. Build the hub for the opposite site and connect the top pair and the bottom pair of frictionless pins with beams. These beams will be connected to the chassis between the hubs. The free end of the u-join will connect to the drive shaft. Steering: insert an axle through the top right hole of both portal hubs. This should also pass through the empty hole of the 92907 connector. At the ends of these axles attach a 6536 connector by the axle hole, of course. Insert frictionless pins in the round holes of the above connectors and then connect a gear rack (64781) to those pins. You will now have a parallelogram formed by the beam between the hubs, the 2 axles and the gear rack. This parallelogram can be deformed by rotating a 12t double bevel gear (which is static related to the chassis) over the gear rack. Regarding other wheels to attach to these hubs, you can try the cheaper 56908 which accept 80.4 tires.