There are more than one set with such characteristics. While first four are from 20th century, I've included them anyway, since they are well-known and include characteristics you are interested in.
Let's begin with 8860 - Car Chassis from 1980. This model has steering, 4-cylinder engine, 3 speed transmission, adjustable seats, rear suspension, ...
This can be done without a caster wheel as well:
Start out with a three wheeled vehicle, with two wheels in the front and one smaller wheel with less traction than the front wheels in the back. All wheels need to be fixed.
One of the front wheels is attached to the motor. This might need to have some gearing to get an appropriate speed.
The other front ...
The "wheels" are really the hubs, mostly from the various Speed Champions cars among others.
The inside of the wheel takes a standard stud, so you should be able to use:
Plate Modified 2x2 with Pin Hole
Technic Pin 1/2
Wheel Cover 5 Spoke
Beyond the primary question of how to build these particular wheels, there are a few common themes among wheels and ...
From a glance it doesn't look like a set as much as something someone might have randomly put together. The two blue 1x2 tiles at the front seem odd, as do the double-stacked black round tiles.
Of all the pieces used it seems the rarest would be the blue steering wheel or the blue seat. It turns out the blue seat piece is used in 'only' 67 different sets.
I would suggest looking at a speed build of this model and comparing the placement of pieces with that of your own.
So, let's try...this guy's video => The Austrian Lego Fan seems to have banged out a step by step build of this model, which shows a many angles of the area you're have issues with.
To get those butt-dragging results, you may have got your ...
You can attach couple of half bushes or full bushes on inner side of the axle near Technic beam like on the other side you have done with a gear. If axle is still trying to slide - fill in the entire inner axle part with bushes.
Here is picture of suggested fix. Here you can see extra half bushes added to fix the axle the same way gear fix the other axle ...
I see a gap between the grey part and the black part. They should be flush picture 1. Normally it take some force to assemble these hub parts.
If you look to the back side of the "back" side you must see the clip of the grey as
The grey part must rotate freely so if you apply some force to if and have it slow down if its own it must continue ...
I've read about someone having exact the same problem with the 42030 (Volvo L350 F wheel loader) years ago. And basically, the wheels aren't that different with this model.
Apparently, people sometimes don't realize how much force they need to use to click the wheels on.
The problem is with these pieces:
fitting in these pieces:
You need to use much ...
Assuming that you're asking about the engine in particular, it seems to be a large number of pneumatic engines that have been coupled together in order to supply the required torque. LEGO pneumatic engines typically consist of a pneumatic cylinder driving a crankshaft. Here's a basic picture to give you an idea:
The shaft usually also controls a pneumatic ...
In WeDo 2.0 app "LEGO® Education WeDo 2.0" there is a complete project 12. Steer that is exactly about that
When it drives forward it goes in straight line, when it drives backward it then turns to one side.
There is full build instruction in the app.
I've also added distance sensor and made it fully autonomous - whenever it sees obstacle it goes back, ...
Obviously The Lego Group has not released any sets specifically designed for the constraction figures, but some sets would still be reasonably sized. I've never asked a storm trooper, but let's assume he is 6 feet tall, or 72 inches. According to Brickset's information, 75114 is "over 9 inches tall" That makes the scale for the figure about 1:8.
As far as I know, there isn't an ambulance slated for release in 2017, and there hasn't been one available since 4431 in 2012:
This set can be picked up currently for as little as $30 used on Bricklink or eBay.
I designed some WeDo 2.0 models that can drive and steer using just one motor.
This one uses a system of gears to alternately drive the left or right wheel of a differential drive robot, depending on the turning direction of the motor.
You can find the complete building and programming instructions here:
Gev already answered the question about availability. LEGO Ideas sets are produced in small quantities. Perhaps this will change in the future as LEGO Ideas is now out of beta testing and was brought in-house by LEGO. The Curiosity is not going to be back unfortunately. I just called LEGO about this a couple of days ago.
As far as the Curiosity inventory, ...
I don't recall an official statement, but one story I read said that they made a deal with the original designer to limit production to one run, but that seems almost apocryphal.
As for buying the pieces you need, I would think you'd have better luck on Bricklink.
It's possible that the PaB on S@H might have all the pieces necessary, but that seems truly ...
If you want to stick to your current design (despite its obvious flaws), then here's another idea. Let's go!
As you can see, I tried to rebuild the crucial part of your framework.
Alright. Now two things I've noticed. You're using axles with stop. And there's some play between the bush and the wheel.
Okay, firstly on axles with stop.
Here's two pairs ...
Assaf, please note that this is not part of LEGO's website. StackExchange doesn't sell LEGO sets. In regards to your question, you are right; the #10187 LEGO Volkswagen Beetle is no longer available directly from LEGO. It was a set that was released back in 2008.
LEGO usually keeps sets on the market for a couple of years, sometimes a bit longer if they are ...