bloodhound ssc project
Post on 11-Sep-2014
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Essential Skills Application of Number Level 2
Matthew Evanson
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Bloodhound SSC
Intro
Bloodhound SSC is a project launched in December 2008 which aims to build a car and break the world land speed record by achieving 1,050 mph. The project is led by Richard Noble and the car will be driven by Andy Green. The car will be powered by a jet engine, from a Eurofighter Typhoon, and a rocket. The plan is to uses the jet engine to get the car to around 300 mph before igniting the rocket to get the car above 1000 mph. The jet engine will have a total thrust of 20,000 LBS of thrust. The rocket will add 25,000 IBS which the team behind the project hope will give them enough to break the record. This will give the car a total thrust of 55,000 LBS. The ratio between the rocket and the jet engine would be 5:4. or 55% to 45% There will also be a Cosworth Formula 1 engine powering the fuel pump to feed fuel to the rocket. The cars total mass will be 7780 KG with fuel and the driver. The car will contain 1752 KG of fluids or 22%. Total Weight of Bloodhound SSC Showing the Contribution Liquid Makes to the Total
Mass of the Car
History of Land Speed Records Since the invention of the car, many people have broken the land speed record. In total the record has been broken 59 times by 29 different people and 24 different cars:
A Table to Show Every Time the Land Speed Record has Been Broken
Year Location Car Diver Nationality Speed (M.P.H)
1898 Acheres Jeantaund Gaston de Chasseloup‐ Laubat France 39.2401899 Acheres Jenatzy Camille Jenatzy Belgium 41.4201899 Acheres Jeantaund Gaston de Chasseloup‐ Laubat France 43.6901899 Acheres Jenatzy Camille Jenatzy Belgium 49.9201899 Acheres Jeantaund Gaston de Chasseloup‐ Laubat France 57.6001899 Acheres Jenatzy Camille Jenatzy Belgium 65.7901902 Nice Serpollet Leon Serpollet France 75.0601902 Ablis Mors William K.Vanderbilt USA 76.0801902 Ablis Mors Henri Fournier France 76.6001902 Ablis Mors Augieres France 77.1301903 Ostend Gobron Brillie Arthur Duray USA 83.4701903 Dourdan Gobron Brillie Arthur Duray USA 84.7301904 Daytona Mercedes William K.Vanderbilt USA 92.3001904 Nice Gobron Brillie Louis Rigolly France 94.7801904 Ostend Mercedes Pierre de Caters Belgium 97.2501904 Ostend Gobron Brillie Louis Rigolly France 103.5501904 Ostend Darracq Paul Baras France 104.5201905 Daytona Napier Arther E Macdonald France 104.6501905 Arles‐Salon Darracq Victor Hemery France 109.6501906 Daytona Stanley Fred Marriot USA 121.5701909 Brooklands Benz Victor Hemery France 125.9501910 Daytona Benz Barney Oldfield USA 131.2751911 Daytona Benz Bob Burman USA 141.3701914 Brooklands Benz L.G.Hornstead UK 144.1001924 Arpajon Fiat Ernest Eldridge UK 146.0101924 Pendine Sunbeam Malcolm Campbell UK 146.1601925 Pendine Sunbeam Malcolm Campbell UK 150.7601926 Southport Sunbeam Henry Segrave UK 152.3301926 Pendine Babs J.G Parry Thomas UK 169.3001926 Pendine Babs J.G Parry Thomas UK 171.0201927 Pendine Bluebird Malcolm Campbell UK 174.883
1927 Daytona Sunbeam Henry Segrave UK 203.7921928 Daytona Bluebird Malcolm Campbell UK 206.9561929 Daytona Golden Arrow Henry Segrave UK 231.4461931 Daytona Bluebird Malcolm Campbell UK 246.0901932 Daytona Bluebird Malcolm Campbell UK 253.9701933 Daytona Bluebird Malcolm Campbell UK 272.4601934 Daytona Bluebird Malcolm Campbell UK 276.8201935 Bonneville Bluebird Malcolm Campbell UK 301.1291937 Bonneville Thunderbolt Greg Eyston UK 312.0001938 Bonneville Thunderbolt Greg Eyston UK 345.5001938 Bonneville Railton Mobil Special John Cobb UK 350.2001938 Bonneville Thunderbolt Greg Eyston UK 357.5001939 Bonneville Railton Mobil Special John Cobb UK 369.7001947 Bonneville Railton Mobil Special John Cobb UK 394.2001963 Lake Eyre Bluebird Donald Campbell UK 403.1001964 Bonneville Spirit of America Craig Breedlove USA 407.4501964 Bonneville Wingfot Express Tom Green UK 413.2001964 Bonneville Green Monster Art Arfons USA 434.0201964 Bonneville Spirit of America Craig Breedlove USA 468.7201964 Bonneville Spirit of America Craig Breedlove USA 526.2801964 Bonneville Green Monster Art Arfons USA 536.7101965 Bonneville Spirit of America Craig Breedlove USA 555.4831965 Bonneville Green Monster Art Arfons USA 576.553
1965 Bonneville Spirit of America.Sonic 1 Craig Breedlove USA 600.601
1970 Bonneville The Blue Flame Gary Gabelich USA 622.4071983 Black Rock Thrust 2 Richard Noble UK 633.4681997 Black Rock Thrust SSC Andy Green UK 717.1441997 Black Rock Thrust SSC Andy Green UK 763.035
0.000100.000200.000300.000400.000500.000600.000700.000800.000900.000
1898 1904 1927 1963 1997
Speed (M.P.H)
Year
A Graph to Show the Speeds at Which the Land Speed Record has Been Held
I have also created a graph to show how many times the record has been broken by drivers from different countries. The UK currently leads with 27 times compared to 16 by the USA. Pendine sands in Camarthenshire has been used multiple times for breaking land speed records due to the beach being very straight and long. When Thrust SSC was being designed, tests were carried out at Pendine were they placed a model of the car and put it on a rocket sledge to test the aerodynamic properties of the car.
I have also created a graph to show the progression of the record since the first one was set in 1898.
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5
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UK USA France Belgium
Times Record Brok
en
Countries
A Graph to Show the Number of Times Each Country Has Broken the Land
Speed Record
Analysing the Results From looking at the line graph showing the different speeds, i think that progression has been steady increasing exponentially. From 1898 to 1927, the graph isn’t very steep which shows that progression was not very impressive which is probably because of the lack of technology. From 1927 to 1997, the graph seems to get steeper but then its stays at that steepness. I think that this is because as technology has got more advanced over the last few years, the cars can go a lot faster. The first jet powered car was used in 1937 and I think that coincides with the graph increasing. For example, the first car to break the land speed record was Gaston de Chasseloup‐ Laubat driving the Jeantaund. This car would have been made in 1898 so there wouldn’t have been the computers and materials to build the car like there was for Thrust SSC. I think therefore that in the future, the graph is going to get even steeper because as technology increases, the speed of the cars will increase a lot more.
The Motion During each run that the car makes, it is going to accelerate rapidly. This can be shown on the graphs below. I have added the labels the black line through the graph indicating when the acceleration is zero.
A Graph to Show the Acceleration and Speed over Time of the Bloodhound during a Perfect Run
A Graph to Show the Acceleration and Speed over Distance of the Bloodhound during a Perfect Run
The graph gives the speed in meters per second. However, when looking at the speed of cars, we tend to use miles or kilometres per hour. To convert meters per second into kilometres per hour, I made the following formula: If 1 mps = 3.6 kph Then S = S x 3.6 (S being the speed in meters per second) From learning and understanding this formula, I was then able to convert the meters per second measurement to kilometres per hour. To convert kilometres per hour to miles per hour, I divided the number by eight and then timed it by five. I could then complete this table. I have rounded these numbers to the nearest whole number.
Time Speed (mps) Speed (kph) Speed (mph)
Rocket starts 18 133 479 299 Rocket stops 43 466 1678 1049 Jet engine stops 44 444 1598 999 Parachute 1 deployed 46 266 958 599 Parachute 2 deployed 54 177 637 398 Wheel brakes applied 63 111 400 250
Distance and Speed In the graph below, I red divisions which I have added represent the distance of the track in miles. I did this as I knew that 1.6 KM equalled a mile. There for if I could complete this table and make the divisions on my graph.
Miles Kilometres 1 1.6 2 3.2 3 4.8 4 6.4 5 8.0 6 9.6 7 11.2 8 12.8 9 14.4 10 16 11 17.6
I was then able to measure the distance on my graph between each division and then find the highest speed through that distance to show where the measured mile should be. This is marked out in Blue.
Scale Diagram of the Track
Time
I was then asked to look at the time when the car enters the measured mile and when it leaves, and whether it was half way. I believe that the car will enter the measured mile at 40n seconds and leave at 44 seconds. The run will last for approximately 96 seconds
so the mile will not be half way.
Return run In order for the car to make a record, it has got to turn around within an hour of the first time being set, to make another run as an average. The car starts its return run from the measured mile as this will give sufficient space for the car to accelerate. The car will need to start at the 13.6km mark on the first run for its return run in order to go through the measured mile at the optimum speed. I worked this out by looking how far it has got to go from the measure mile to reach it optimum speed.
Try It Yourself In this section of my project I have been asked to construct a car that I made myself. I then had to run it five times. This is the information I collected along with the speed which I worked out by dividing the distance by the speed. Distance (Meters) Time (S) Speed (Meters/S) 3.5 10.1 3.5/10.1 = 0.35 3.3 9.8 3.3/9.8 = 0.34 3.4 9.7 3.4/9.7 = 0.35 3.5 10.2 3.4/10.2 = 0.34 3.2 9.2 3.2/9.2 = 0.35 I then had to work out the average range and speed for the five runs I made: Distance: 3.5+3.4+3.5+3.4+3.5= 16.3 /5 = 3.46 Time: 10.1+9.8+9.7+10.2+9.2=49 /5=9.8 This means the average speed was: Average Speed: 3.3 / 9.8 = 0.33 M/S To work out the range of the numbers, I needed to take the biggest away from the smallest: Distance: 3.5 – 3.4 =0.1 Time: 10.2‐9.2 = 1 Range Speed:0.3/1= 0.3 (M/S) I would say that the mean is the best way to display my data because it gives a fair representation of my results. You would only really use the median if there was a large range in my results. For example, if there was a physical problem, such as the wheel falling off, then I would use the median. Therefore, I chose to use the mean.
I was then asked to make some improvements to my model to make it better:
Improvement 1: Bigger Balloon Distance (M) Time (S) Speed (M/S) 4.1 8.9 0.46 4.3 9.3 0.46 3.9 9.1 0.43 4.3 9.2 0.47 4.2 9.5 0.44
Improvement 2: Bigger Wheels
Comparing these results to my original results, it shows that I was right to make these improvements because both produced better results. The bigger wheels made the car go slightly further but the bigger balloon made it go further and faster, so I think that it was a better improvement. I also think that if I was to run this experiment again, I would put both improvements on the car at the same time because I would expect the balloon to make it go faster and the wheels further producing a more impressive result.
Bibliography All images have been taken from the Bloodhound website: http://www.bloodhoundssc.com/. The originators are Curventa and Siemen.
Distance (M) Time (S) Speed (M/S) 3.7 10.6 0.35 3.6 10.5 0.34 3.8 10.9 0.35 3.6 10.8 0.33 3.5 10.4 0.34