How to motorize the Lego Technic Race Truck, set 8041

I assembled Race Truck. Then I wanted to add motors to it, which are called Power Functions.

Other people have instructions on the Internet how to motorize the race truck, but they use extra parts. I wanted to use only the parts that come with the set. Also, I wanted to make it simple, because I am only 9 years old.

Here is what I did.

Step 1. Take the stuff from the rear end of the truck. It should look like this pic, Fig.1

Fig. 1

Step 2. Collect all the parts you need, see Fig.2. They all are in the set, except for the 2 motors and battery pack, and receiver and controller. You have to buy them separately.

Fig. 2

 

Step 3. Assemble the frame for the XL motor that will drive the back wheels. It should look like Fi. 3 and 4

Fig. 3


Fig. 4

Step 4. Attach the axle 9 and axle 4 and the XL motor, also the black gear. Like in Fig.5.

Fig. 5

Step 5. Take off the yellow gear and axes connected to it in the back of the cab. Should look like Fig. 6

Fig. 6

Step 6. Now make a frame for attaching the M motor that will turn the front wheel. Use two pieces (part number 4173668) and small blue pegs like in Fig. 7. Then attach to them 7-holes beam like in Fig. 8.


Fig. 7

Fig. 8

Step. 7. Add yellow gear, axle connector, axle 3 and axle 4 and 2 black pegs, like in Fig. 9.

Fig. 9

Step 8. Attach M motor to axle and two pegs.

Fig. 10

Step 9. Make the frame to attach the battery pack. Take two 5-hole beams and attach on the top of differential like in Fig. 11. Snap the battery pack on the pegs like in Fig. 12.

Fig. 11

Fig. 12

Step 10. Put receiver on the top of the engine and connect the wires. The final truck should look like Fig. 13.

Fig. 13

And now you drive it -- click here for a movie.

Mangonel

I made a Mangonel. A Mangonel is a contraption. (here is a pic)

The Mangonel works like this. There is a spoon, you crank it down . And then you stretch the rubber band  attached to the spoon . You put ammo on the spoon. Then you release crank1.

The Mangonel was first used about 2,500 years ago. 

Gear box

I made a gear box out of Lego Technic parts . It converts slow turning in to fast turning.

Now look at the picture.

 

A is a box, it hold everything together .
B is a handle to hold the box A.
C is a crank ,I turn it with my hand ,and it turn axle D.
D turns 40teeth gear E.

E turns 8 teeth F gear witch turn G 40 teeth gear , witch is on the same axle.

F is 8 teeth F gear turns g gear , witch is on the same axle.

G is a 40 teeth gear witch turns 8 teeth H gear , witch is on the same axel as 40 teeth I gear.

H is 8 teeth gear that turns 40 teeth gear I , witch is on the same axel.

I is 40 teeth gear , witch turns 24 teeth J gear.

J is 24 teeth gear , witch turns K axel.

K is axel , axel K turns wheel L.

L is wheel.

Gears F and G are 5x faster then gear E.

Gears H and I are 5x faster then Gear G.

Gear J is 1.5x faster then gear I.

All together, wheel L is 5x5x1.5 = 38 times faster than crank C.

The brick and the ram

Today I made a battering ram,(On the left) a battering ram is a contraption that was used from 9 century BC until this very day.


If you are wondering what the science is? Well, here, energy gets storage in the pen and force goes in the wall. it was made out of wood and the top made of metal. The top was usually in the shape of a ram head which is why its named "The Battering Ram" 

 I made a cage out of Lego. I tied rope to the pen and the cage. Then each time I pulled the pen a cm farther the brick flew farther

Then I made a graph. It told me if I pull it from 0 cm to full blast where it will land. After I put a gram of weight on the pen and did full blast. It went extremely far.

Mushrooms are fungus, not a plant. Since they are not a plant they don’t exactly grow like plants. In other words they don’t need the sugar made from sunlight and carbon dioxide. As well they grow above soil, or on its food source such as a tree.

Why are we talking mushrooms? Well my brother found a mushroom, extremely huge mushroom, and we are showing you the mushroom right here in this picture.

You see the ruler? It is a foot long so the mushroom is more then half a foot. That's pretty big.

IT'S AN ALIEN! EVERYBODY RUN!

Stinky soap

Today I fizzed up soap. First, I put soap in a bowl and then, put the bowl in the microwave for three minutes then it fizzed up and got very stinky.

Last, I put it in a little longer and then it turned in to liquid soap

I spent several days at the Assategue Island in Maryland. I learnt about many animals that live there.

Wild horses come in small groups, they are very suspicious, and their poop looks like green ovals. They eat grass and drink water. When horses sleep they put one foot up, and then they put another one up.

The Maryland blue crab has blue on its claws. Male has a candle shape on its stomach, and a female has a temple shape on her stomach. You catch a Maryland blue crab by taking a hook attached to a string and then take a piece of chicken, hook it to the hook. It is illegal to keep a crab if it is smaller than 12 centimeters.

Other animals I saw: horseshoe crab, a lady crab, clam, mussel, starfish, seahorse, egret, and plankton.