Tuesday, March 10, 2009
We greatly enjoyed this ballooncar assignment.
Now we're done the car, it's time for the report; we're gonna do 150% better on our report, to make up for race day . But overall, We think we did the best we can do, compromising our ideas together to make the most decent XPLOSION ballon car :) :)
To summarize the race:
Trial ONE - I blew the ballooncar, hoping that it would reach the 3 metre mark. Mr.P says "GO" ... FAIL ! My hand got caught inbetween ... well with the ballooncar. SOOO then again, I had to blow into the car, ... here goes nothing. After, Mr.P repeats himself, and our car MOVES ... NOT ONLY WAS OUR CAR MOVING, IT WAS TRAVELLING IN A STRAIGHT LINE, and, it reached the 3 metre mark ! We were so happy ! =)
Trial TWO: Before this trial, we attached another balloon. Reason being, the balloon had so much saliva in it ! ( I know, NASTY !). I then blew the balloon and let it go for the second trial. The ballooncar didnt even move =( But atleast we made it on the first run! Why didnt it move ? The car did not move because we attached the balloon to the car with very tight tape. This ensured the air to escape the balloon slower and with less power and air to push the car.
Monday, March 9, 2009
Materials we used :
alluminum foil->it reduced the turning of the car... a bit. This was a last minute thing, I could not find anything else to add to the car =(.
knex wheels->the best wheels we could find, plus the weight wasnt so bad =)
BBQ sticks->We wanted to be original =) Its light, and easy to work with
bristle board. WHY? For decoration.
straw-> it let the air esacpe the balloon slower, enabling it to move the car.
rubberband-> to attach the balloon to the straw
gluegun/glue/tape -> Obvious reasons :P
balloon-> used for the "gas" of the car. ( the air escaping the ballon car)
X-PLOSION BALLONCAR ! We fixed our car, and now it goes in a straight line ... (most of the time, still not perfect, but we tried our best =) ) !! YAY.Tomorrow is race day, and we hope our car does well !
Sunday, March 8, 2009
Saturday, March 7, 2009
1. took out one wheel, to make the ballon car have THREE wheels.
2. you know that red part you see in the picture of our recent ballooncar ? The one that is attaching the wheels to the car? We changed those knex parts to bbq sticks ! AND OBVIOUSLY it reduced the weight of the car by a lot :)
Thursday, March 5, 2009
a ) insert the balloon in net and attach net onto car
b ) create a fence around ballon to prevent it from moving
We tried both, but havent decided on which one is better ... * still in discussion
concusion - we did not do any of the ideas, we just taped the balloon securely to the car.
Wednesday, March 4, 2009
SOOOOOOOOOO WE FINALLY BUILT A DECENT CAR ! YAY ! :)
We put parts of our cars together to make a ballon car that works very well !
BUT the only problem is making it travel in a constant direction ; to make it travel in a straight line.
materials we used :
knex wheels with some other knex material like the sticks, BBQ sticks, straw, string, and cant forget the balloon !
P.S. this is the 4th car we SHOULD have raced with for race day.
So I've decided to totally change my whole idea since my last idea didn't work too well. So I made the body of my car out of bbq sticks and the wheels with sewing material ( the rolls ). Here is a picture of it ...
BUT this did not work either due to the wheels. So .. I think the biggest challenge is to find better wheels.