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Group Prezi Hovercraft
Transcript of Group Prezi Hovercraft
He wants a hovercraft that will not only function properly but must also look aesthetically pleasing since its the CEO who is going to ride on it.
Since he likes playing golf, he wants it for smooth transportation on the golf course.
A vehicle or craft that travels over land or water on a cushion of air provided by a downward blast.
By: Abdul & Shahal
A real life hovercraft!
That's the Hovercraft!
Our hovercraft once finished will me made out of a styrofoam plate to hold the propellers, motors, and the flexible skirt.
There will be a hole a little infront of the center to hold the lift motor and propeller and will be measured and cut a little bigger than the motor to maintain airflow from outside and in the skirt. Popsicle sticks will be glued to hold the lift motor.
The motor and the propeller in the back will be glued and held on a little Popsicle truss structure which will not only give it a certain height above the base but will also keep it steady.
Our hovercraft will be tethered to make it lighter.
Our flexible skirt will be made out of a plastic garbage bag which will be wrapped all around the base and taped like a cushion with holes in the bottom for some air to escape.
Some areas we researched on were
Drift: Be carried slowly by a current of air or water.
Drag: Pulling forcefully
Skirt: Its purpose is to direct airflow downwards from the fans - to generate lift.
Balance of weight
Our four hypotheses:
1) surface roughness slows a hovercraft's speed;
2) the larger the skirt, the faster the hovercraft will go;
3) the more weight applied onto the hovercraft, the faster it will go;
4) the more powerful the motor/propeller the faster the hovercraft will go.
Only hypothesis 1 on surface roughness was found to be true. The 3 other hypotheses were found to be false.
Many forces are at work on the hovercraft like gravity, friction, and the lift (air cushion) of the hovercraft.
1 question Abdul and I asked ourselves:
What is the best design we can come up with for our hovercraft which will be efficient,light, aesthetically pleasing, simple and most importantly, possible to construct?
Reason for the name.
Some factors that affect the operation of a hovercraft:
1.Weight of the Hoverboard
2. Air or fluid pressure
3. Control of the air flow beneath the bottom surface of the hoverboard in order to make the whole thing work
4. Passage of air.
5. Thrust and steering device.
6. The surface it is traveling upon
7. Air resistance
Working with others
Garbage bag for skirt
1. Make rough sketches
2. Choose the best design out of all the sketches made
3. Make sketches of top, front, side view of the best design
4. Pick 2 motors and propellers that function properly
5. Use battery to test them
6. Cut a hole (double the radius of the motor) with an exacto knife for the lift fan on the Styrofoam plate
7. Use Popsicle sticks to make the structure on the back to hold the thrust fan
Designs that contributed our final idea
We were focused, determined and organized all the time while we were designing and making our hovercraft. We always looked for a better design to get a very good result. We achieved this by not working hard, but, working smartly.
We used this model to utilize our plan.
Our 5 rough sketches
On his new hovercraft
Our hovercraft will be a rectangular styrofoam for the hull. It will have a hole cut a little infront of the middle which will hold the motor and fan with the help of two popsicle sticks (glued on the top) to provide air for the bottom. There will be a Popsicle structure on the back as well to hold the second motor and which will be used to propel the hovercraft forward. This fan will be tilted inwards to provide the airflow towards the lift fans. Once these fans and motors are placed in the correct position using hot glue, the machine will be used to test it. Once done the skirt a plastic garbage bag will be carefully wrapped all around the hovercraft. Next, there will be tiny holes made in the hovercraft which will be used to provide the levitation. Now the hovercraft is ready to be tested.
Other things we decided upon:
Best shape for a hovercraft.
When tested, it should function properly.
Distance between the lift motor and the back motor.
Should we use batteries?
How many fans should we put?
How can we be different than our peers?
What other decisions might be necessary?
8. Glue the motor on the back on top of the structure (the fan facing inwards tilted)
9. Glue the lift motor inside the hole (the fan facing downwards) by attaching it to two popsicle sticks which will be held by the surface
10. Fold a garbage bag for our skirt on the bottom and tape it around the plate keeping it loose.
11. Next make tiny holes in the skirt so the air can travel through and the hovercraft can levitate.
12. Connect all the wires with the electrical machine to provide the power.
13. Once the fans are properly working you are ready to paint the hovercraft navy blue
14. Put 3 coats of acrylic navy blue paint.
15. Now it is ready to be tested/raced.
However we changed our plans a lot of time. We made over 5 models until we finally reached with the final product which functions properly but it is still in progress.
Some of our previous hovercraft models
To make a fully functional, aesthetically pleasing and an efficient hovercraft with the propellers, motors and wires given in class and also to use our own batteries but within a maximum range of 24 volts, any material for the base and skirt.
The batteries will be used to power the motors which will help turn the propellers.
The fans and motors will provide both acceleration and levitation for the hovercraft.
The skirt will be the main base of the hovercraft it will also help levitate the hovercraft.
Overall this project was not bad for us.
Even though we spent too much time on thinking about our final design, we achieved a a good final result which is a working hovercraft.
Since we didnt spend time on our skirt so much, we had to remake it many time.
We didn't research enough about air circulation to the skirt which will make it hover. But we finally found it and realized our mistakes.
However, all the mistakes we made were redeemed with our final product which actually hovers properly.