Reflection6:

Today Mr Ward showed us some different ways to join two or more pieces of pine wood.

- we learnt how to make a rebate joint, this joint increases the glueing area which would then make the pieces more sound:

- we then learnt how to do a simple joint called a butt joint, this was a simple joint that all you do is glue to flat surfaces together then hold it together with a nail.

- the final joint we learnt was a reinforced but joint, this was a triable nailed and glued onto a butt joint.

Reflection 5:

New topic:

Design Futures Year 10 Pre- Engineering Trebuchet Design:

Height: Is not to exceed 550mm

- energy can not be created but it can be transferred or transformed.
- the trebuchet transforms from stored gravitational potential energy to kinetic energy to air friction

EXAMPLES:

This is a photo of a Trebuchet with a sling.
Mr Wards:
Potential Energy (gravity) = m x g x h
                                         = 3 x 9.8 x 0.4
                                         = 11.76 Joules

Reflection 4:

Over the past couple of lessons i have been working on creating my car. I am nearly finished i just have to do a test run and fix anything that needs to be changed.

So far it looks like:

The engine, battery holder and the switch are all glued with double sided tape. I used this as it is more accurate then the hot glue gun and is flat. Next lesson I will glue the battery holder down properly as it isn't completely straight and centred. 

Reflection 3:

OBJECTS:

spur gear
pinion gear
engines
axel housings
wheels
battery holder
little wheels
use core flute

This lesson I am going to start ideation and drawing.

Reflection 2

How to make a car go faster than another (create less friction):

- converting energy from the batteries to the wheels
- the lighter it is the faster it goes
- the more mass that is over the back wheels the less the wheels spin on take off
- test different combinations of gears to see which one goes faster
- coreflut can be used as the body of the car as a lighter alternative

Reflection 1:NEW TOPIC

This term in Df we will be building small cars that will be raced down a track. To make the fastest car you need to be able to decrease the friction between the car wheels and the track.
This lesson we learnt about how to calculate velocity:

Velocity: is the rate of an objects position with respect to time in a given direction.
V= displacement/time

Eg1:
A car takes 12 seconds to travel a distance of 50 metres. Determine the velocity of the car.
v=/d/t
T=12s
D=50m
V=?
v=50/12
v=4.2m/
therefore velocity is 4.2m/s

Eg2:
How long would it take a vehicle to travel 1000m if its average velocity is 15m/s
D= 1000m
V=15m/s
T ?
V=d/t
t=d/v
t=1000/15
1=66.67 sec
therefore time taken is 66.67s

Eg3:
Determine the displacement of a vehicle travelling 20m/s for duration of 1 minute. 
V=20m/s
T=60s
D=?
V=d/t
txv=d
60x20=d
1200m=d
therefore the displacement is 1200m or 1.2Km

Reflection 4: Evaluation of the Torch

EVALUATION:

 

A predominant issue that has been present in today’s society is the reoccurring assault happening towards women. A useful and important accessory that can increase the security of all women today can be a torch. By having a small torch that can be easily accessed at all times can be ideal in stressful situations. For example in dark corners trying to locate your key to get into a safer place, to identify strange people if they are coming to close and finally it can be used as a defence mechanism if your in a situation where you have to attack.

 

How I built my torch:

 

BARREL:

The completion of my barrel started by drawing one of the sides on a frontal work plane so it can be revolved. The width of the handle is 25 mm, I chose this measurement because it is small but still easy to hold onto and can fit into small places. The length of just the barrel is 115 mm. I then rounded the end of the barrel as well. To create the button I extruded a shape from the middle of the barrel on the frontal work plane that rounded the edges to make it easier to handle.

 

REFLECTOR:

The reflector was also assembled on a frontal work plane, the 2 sides were 15 mm and the width was made to fit perfectly in the barrel. When I finished drawing it I revolved it and then shelled it with a 2.5 mm edge.

 

LENSE/TOP CAP:

The lens was made by making a circle, then extruding it 8 mm then extruded it down about 6 mm. I did this so I could create an LED look. I did this by drawing circles on the face then duplicating them and finally extruding them up.

 

FINAL ASSEMBLY:

I added the barrel then the reflector and selected an edge from each and centred the axis. I did the same thing with the lens and moved it all together so they could fit.

 

Finally I really enjoyed this topic a lot as I improved my skills on pro desktop to a great extent from last year.

 

Reflection 3:

I have finally handed in the projects so now I can start the ideation process of my safety torch. So far this is what I have researched:

MEASUREMENTS:

LED 2-Cell D Flashlight Specifications:

Length: 10" (254 mm)


Barrel Diameter: 1-9/16" (39.67 mm)


Head Diameter: 2-1/4" (57.00 mm)


Weight with batteries: 23 oz. (674 g)

http://www.maglite.com/d_cell_led.asp

Batteries:

AA: 14.5 × 50.5 (diameter x height)

AAA: 10.5 × 44.5 (diameter x height)

http://en.wikipedia.org/wiki/List_of_battery_sizes


IDEATION SO FAR:

I really like these because they are relatively simple and they have ideal features like anti role bar around the head of the torch, non slip grig and shatter proof lenses.

Reflection 2:

So far this term we have been working through pro desk top to complete a series of projects to get us ready for making the torch that is due the start of next term. These projects included using skills like:
- mirroring
- revolving
- extruding
- projecting
-adding components, fixing them, mating faces
- rounding edges etc.
Now that we have the knowledge of these certain skills it will be easier to make are torches.
Our projects like the clock, toy block, phone, wheel, calculator and pen are due this Friday. So far I have done all of them I just have to print them out and then I can hand it in.

Reflection 1: Introductory lesson pro desk top

Todays lesson was an introductory lesson about Pro desk top, Mr Ward demonstrated some simple techniques and explained the C.A.D and C.A.M explanation.

C.A.D: Computer Assisted Drawing or Design

C.A.M: Computer Assisted Milling Machine 

Next lesson we will probably start working on the computer. 

Reflection 9: finished product

Preparation for our oral:

Charlie and I worked really hard to make sure that our resort was finished in time for our speech. We managed to complete the project with just enough time to practise and rehearse for the oral. Over all we both used our time wisely in every lesson making sure we came to each class with a plan of what to do. For example in one of our lesson we decided that I would get the wind turbines made and Charlie would finish laying the snow and painting the turbines. This would happen every lesson to make sure that we weren't waisting time, but still having fun. By doing this Charlie and I didn't have to stress when the time came to write the oral because we new that our resort was organised and finished. (except for a few minor additions we had to make one lunch time)

Overall I really enjoyed making the resort and having the freedom to design our own thing!

Reflection 8: Term 2

This week we have had two lessons, Charlie and I have been working very hard to complete our project and we have planned our time very well. Last term we finished painting our project, making snow, making all the huts, making our wind turbines and making the train track. This term we have just finished off the last bits like painting the wind turbines, making a train for the train tracks and glueing more snow everywhere! On friday our last lesson for the week, we will finish or project by making trees to put around the resort.

How we made different items:

SNOW: grated the white styrofoam shapes

TRAIN TRACK: used red clay and hot glued it around the mountain, and finished it off with grey paint.

WIND TURBINES: used a very long thin round piece of wood and cut it into 3 shorter sticks then used masking tape to tape wire to the top. then folded the wire down to a 90 degree angle and put a little white fan on the end of the wire. This resulted in the fan being able to spin. Then we painted it white and sprinkled snow on the top.  

HUTS: regular cardboard folded to make a cube than than we used a cardboard with a bumpy texture to make the roof and door than we painted  PVA glue on the top of the huts then dipped the huts in our fake snow to make it look like it just snowed. 

TRAIN: For the train that went on our train track we just used cardboard to make a 3-D rectangle and painted it grey. 

For the trees we are thinking about just using a cardboard cone and painting it green. 

Reflection 7:pictures

This is the resort so far- ski mountain in the back, train track around the mountain and snow everywhere 

This is what the huts look like however they will have fallen snow on the tops of the roofs. We have about 8 or so of these that will go in front of the mountain

 This is the snow that we made using the material that are in the picture below.

To make the snow we used this styrofoam shell  and a grater. The first time we did this it didn't work because we were using it incorrectly but the second time we got it and managed to make a lot of it!