Burko-uk

This years Dakar Rally included a classic section, including an old 911. I thought I would take the GT3 RS and mod it into a modern equivalent. I don't own the set myself, so it's built from the parts bin. The colour is a bit dubious at first, but is meant to represent teh Wynns Oils race colour (as run by 911's at Le Mans, so there is some pedigree). There's not too much to it - the suspension was lifted by 3 studs, balloon tyres added, and the "splitter" at the front was pushed back a bit. I also added some extra rollcage frames. I dabbled with a bullbar and spotlights, but after three or four attempts, nothing looked right - it always looked like it had crashed into a scaffold tower, so I knocked that idea on the head. Some extra pics are on my brickshelf: Brickshelf Gallery - Dakar Rally inspired Porsche 911

I was inspired when I first saw this car during the dakar, that it's boxey shape would lend itself to my c-grade bodywork skills. That Peugeot no longer race this car goes to show how long it taken me to get myself in gear and actually make the thing! It has 4 L-Motors, powered by two AA battery boxes, through two IR's, one of which controls the steering. The colour vomit finish was intended to match the sponsorship colour scheme, let down by limited clours available for the curved panels used in the door. I ran out of enthusiasm so there's no interior, but given the size of the thing it moves OK. The suspension is based on the F1 car suspension arms, which in hindsight was a mistake. As the weight went up, the shocks needed doubling up, so the hubs look too fat in order to retrofit an extra shock at each corner. Overall, not being a regular MOC-er, and this being the first time I've seriously tried a car, I'm fairly please with this. Original My effort There are a few more pics of the the mechanics on my brickshelf Brickshelf Gallery - Peugeot-3008-DKR Hope you like.

As my Sonos is bricked until I upgrade my phone, my big issue with PU is future compatibility with devices. In 10 years time when Lego replace and stop supporting PU, how do you control it if the app won't work on the newest iOS or Andoid? Will bricklink be full of listings for iPhone 9's so you can run PU? Do I want to spend £400 on an excavator that I may not be able to use in a decade or so? My PF IRs will always work.

More expensive but you end up with more Lego. Mmmmmm. More Lego.

Love the wheel hubs and exhaust. Really clever ideas

Apologies for digging up an old thread, but Madocca, are you selling kits for this on EBay? I'm guessing not, so you may want to protect your IP on that platform! I won't post a link, as I don't want to advertise it any more than I already have. (Oh, and they're pushing your Tatra Trial Truck and Wing Body truck)

Odd doors, possibly borrowed from the Range Stormer Concept (what became the Range Rover Sport)

Nice to see a different subject being built. Looks great.

I'd say 9394 jet too. It's discontinued now, but in the UK on "Online auction sites" they are dirt cheap 2nd hand.

The sting is at a bit of an angle between wheel, so tries to twist the centerline of the wheel from the centerline of the axle, so it binds on the axle. Using a pulley (with the cross drilled out) reduces this issue as the angle of the string is much smaller as there is less offset between the string paths, and the pulley can cope with larger angles of twist before it binds on the axle because it's narrower, so a double win.

For such a high CoG that's amazingly stable! Love it.

As above, put wheels between two flat plates to achieve load bearing, and a normal large turntable (or ring gear from the bucket wheel excavator) for drive. There are plenty of examples in big crane models if you image search

Ha - Good plan. And easier than rebuilding it with XL's :)

Except it won't get torn apart as it's built like a tank... which admittedly is part of the reason it is as fast as a tank.

Yeah, it ended up weighing more than I anticipated. There is a gearchange mechanism in there too using a servo motor to give a slower speed at the push of a button, however this clearly became redundant so is dead mass now. But that just makes it even tougher to flip or push about by the opponent. Also agree with the XLs being a better option now, but I don't get much spare time, and decided to go with what I had rather than miss the deadline. The arm isn't meant to be fast moving. The primary purpose is to grab a victim, rather than hit it like a hammer. The front wheels are hubs from the "Studded Era" Test Car wheels. I picked those as they are smooth plastic, low friction, so the skid steer wouldn't be impacted. I get the point about the driven wheel location, but all the motors and the battery box, and most of the structure for the arm are all at the back. Clearly CoG will move when another bot has been grabbed, but once grabbed, speed is less of an issue.

5. Razor II Cat B - PF IR Signature Move - Grabber/Crusher This was going to be Razor from UK Robot Wars, however I ran out of space in the 45 stud cube, so although similar to Razor, I figured it was different enough to be named Razor II. This robot grabs other bots. Weaker machines are simply crushed, tougher machines are dumped in "The Pit". The body work is almost touching the floor to defend against flipper bots, and the bodywork is solid liftarm construction to be spinner proof. The bot weighs in at 1.8kg. It's driven by 2 L motors. The Claw is powered by twin M-motors and the cobra wings (just to look threatening) are driven by an M-motor. All IR controlled. Main_Topic

This is my entry to TC11 - RAZOR MKII This was going to be Razor from UK Robot Wars, however I ran out of space in the 45 stud cube, so although similar to Razor, I figured it was different enough to be named Razor II. This robot grabs other bots. Weaker machines are simply crushed, tougher machines are dumped in "The Pit". The body work is almost touching the floor to defend against flipper bots, and the bodywork is solid liftarm construction to be spinner proof. The bot weighs in at 1.8kg. It's driven by 2 L motors. The Claw is powered by twin M-motors and the cobra wings (just to look threatening) are driven by an M-motor. All IR controlled. [media] [/media] More pics to follow

Neat looking machine. Nice.

Lovely machine. I'd avoid WD40 though - anything that WD40 touches will rust, as it lifts off any protective layer of grease and then evaporates, leaving the metal to corrode. Try 3in1, as this is a light oil like WD40, but not quite as light, and doesn't evaporate, meaning no rust.

A planetary set up kind of has three "Axles" in one reduction stage. The Sun (single central gear) the Planets (Typically three gears inbetween the Sun and Ring) and the ring. The biggest gear reduction is between the sun and ring, so you fix the planet gears (Making them effectively idlers, with no effect on the overall ratio), drive the sun, and your output is the ring, going very slow with very high torque, hence, popular for winches. Alternatively you can fix the ring and use the carrier for the planet gears as the output, keeping the sun as the input. Electric low line winches tend to use a two or three stage planetary 'box like this, with the ring teeth cut out of the casing.

The push apart forces between the gears are balanced when you use a planetary gearbox, so there are lower bearing loads, so the bearings can be smaller/run faster/last longer. Very useful when you get to high loads, so they are used a lot in winches. You also get a much higher reduction ratio compared to spur gears (standard Technic gear arrangement), again useful in winches.

Oh, and being new to such things, is the size limit 45 studs? Or 45 inches, centimetres, metres, fathoms?

Robot Wars in the UK has a limit that you can only have one weapon, and it's not a projectile weapon.

Try with something less dense (in a loose sense). There's a lot of "Stuff" that you are trying to cut, and all the material will drag on the blade and cause friction, which is where it failed. Maybe try with just the centre card tube?

Not just the Mustang. There's one in the Defender (which I've built). The only issue I had was that the tension of the elastic bands was critical to operation. I struggled to get that right, and Sheepo admits in the instructions and supporting notes that the shifter is not 100% reliable. I'm not sure if there has been further development in later models.