Volvo
FL12 8x8
Saturday 5 June 2010, by
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Technical data |
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Volvo FL12 8x8
Truck features all wheel drive, 4 wheel steering with different steering lock, full double wishbone suspension, remote controlled 4-speed gearbox with neutral gear, working winch, working fake R6 piston engine and working steering wheel.
Remote control
Vehicle is remote controlled by a mobile phone using Bluetooth connection. Both applications (mobile phone app and NXT app) are written by me in Java language (I used LeJOS to program NXT). Click here to see screen-shots from the mobile application.
Gearbox
Gearbox uses 2 driving rings to shift gears, each of them is controlled by one NXT motor. After shifting gear motor locks in a fixed position to prevent slipping off a driving ring. Gearbox design is similar to gearbox mounted in my Maz 5434 with the difference that is has 4 gears instead of 2.
Gear’s ratios are:
Gear 1: 18.75:1 Gear 2: 11.25:1 Gear 3: 6.25:1 Gear 4: 3.75:1
Steering system
Two front axles are steered with different ratios which is 1:1,67 (z12 drives z20). System construction is strong, backlash is low and it is almost impossible to desynchronize axles steering.
Multimedia
Other movies with Volvo:
Lego Volvo FL12 8x8 WIP Lego Volvo FL12 8x8 WIP on snow Lego Volvo FL12 inside cam on Truck Trial Competition LEGO Truck Trial 1/2010 part 2 of 2 LEGO Truck Trial 3/2010 part 2 of 2
Volvo on other sites:
Topic on the Eurobricks Forum Topic on the LUGPol Forum (in Polish)
Atr 2010
View online : Brickshelf gallery - Volvo FL12 8x8
Forum posts
1. Volvo, 5 June 2010, 11:00, by Clement
Dude,
I believe your truck is the most advanced Lego Truck Trial for now 8) I always wondered one thing : are the NXT motors that much powerfull ?
Clement
1. Volvo, 22 June 2010, 20:47, by Atr
Thanks Clement. NXT motor is nearly as powerful as an XL motor, though in the Volvo an XL motor is used for propulsion.
2. Volvo, 22 June 2010, 07:53, by yoraish
What is the most convenient gear ratio that you used? I mean like for most part of the terrain.
1. Volvo, 22 June 2010, 20:52, by Atr
If I were to chose only one gear ratio out of that 4 I would pick the second gear (1:11.25). But this only applies to that certain weight and motor power.
3. Volvo, 5 August 2010, 16:21, by steamtrain
Atr,
Congratulations. This is a very nice integration of NXT-building and truck model building. Never saw something like this before. Simply the best.
I’am trying to make a NXT-truck to, but since i’am having a hard time with programming PID on the mindsensors NXTMMX, i wish i had made a gearbox just like you did.
steamtrain
www.legonxtcranetruck.blogspot.com
4. Volvo, 5 August 2010, 16:29, by steamtrain
Atr,
congratulations. This is a very nice integration of NXT-building and truck model building. Never saw something like this before.
I’am trying to make a NXT-truck to, but since i’am having a hard time with programming PID on the mindsensors NXTMMX i wish i had made a gearbox just like you did.
steamtrain
View online : Volvo