Vehicle Technical Specification - Part 3

10 VEHICLE PERFORMANCE

[Issue 8; Configuration 10; 10th May 2010]

Definition	Unit	Target	Comment
Velocity av. of 2 runs in opposite direction over measured mile.	mph	>1000	To FIA regulations.
Acceleration distance	mile	<4.5	Total track distance 10 mile
Max Velocity (Vmax)	mph	1050	Or as appropriate to achieve the above average speed

Definition	Unit	Target	Status 10th May 2010	Comment
Available Track Braking Distance	Miles	≥5.5	5.5	Hakskeen Pan: 10 mile track plus 1 mile of over run at each end
Nominal distance: Vmax to 0 mph		4.5	?	‘chute solution TBD
Airbrake
Max Deployment Speed	mph	800	800
Max Deceleration	g	3	3	Progressive deployment to maintain g for as long as possible
Braking Distance	miles	4.5	>4.5	Airbrake-only braking dist, no chutes
Parachute
Number of Parachutes		2	2	Target: 2 identical chutes, chute 2 as spare for chute 1
Parachute 1 (fully reefed)
Max Deployment Speed	mach	0.9	0.9	Max strop load TDB
Max Deceleration	g	3	3
Parachute 2 (unreefed)
Max Deployment Speed	mph	400	?	TBD
Max Deceleration	g	3	3
Friction Brake
Application speed	mph	<250		Modified twin rotor DieselMax brake to be verified against the targets
Pedal Effort @ 1g	N	<500
Pedal Travel @ 1g	mm	<100
Brake Fade (Increase in effort)	%	<5
Deceleration (g)	g	1 (Tarmac) 0.3 (Alkali)

Definition	Unit	Target	Status 10th May 2010
Frontal Area	m2		1.937
M=0.5 Coefficient of Drag Area	Cda	0.5	1.1
M=0.7 Coefficient of Drag Area	Cda	0.7	1.13
M=1.0 Coefficient of Drag Area	Cda	<1.3	1.28
M=1.4 Coefficient of Drag Area	Cda	<1.3	1.32
M=0.5 Coefficient of Lift	Cl		-0.38
M=0.7 Coefficient of Lift	Cl		-0.08
M=1.0 Coefficient of Lift	Cl		0.3
M=1.4 Coefficient of Lift	Cl		0.3
Yaw Static Margin at M=1.3	%	3% - 5%	?
Front downforce percentage of static contact patch force	%	0 to 5
Rear downforce percentage of static contact patch force	%	5 to 10

[Issue 8; Configuration 10; 10th May 2010]

Definition	Unit	Target	Status 10th May 2010	Comment
Pump Configuration				Stentor large pump with improved volute
Power Requirement (Design)	shp	665	665
Peak Pump Speed (Contingency)	rpm	12000	12000
Pump Speed (Design)	rpm	11000	11000
Pump Torque (Design)	Nm	430	430
Pump Flow Rate (Design)	kg/sec	47.6	47.6
HTP Inlet Pressure	MPa	0.165	0.165
HTP Delivery Pressure (Design)	MPa	7.58	7.58
Volute and Bearing Housing	-			Aluminium
Pump Shaft, Impeller & Inducer	-			Stainless Steel
Front/rear Bearing Type	-			Roller/Ball Race
Pump Cooling	-			Self cooling with HTP
Pump Mass	kg		34

Definition	Unit	Target	Status 10th May 2010	Comment
Tank Configuration				TBC
Total Tank Volume	litres	810	963
Dimensions	mm	TBC	TBC
Material		6061 T6 Aluminium	Teflon/Carbon filament wound
Working Pressure	MPa	0.165	0.165
Max. Working Temperature	˚C	As low as possible	?
Test Pressure	MPa	TBC	TBC
Baffle Configuration				Horizontal and vertical plates with 114mm diam holes
Outlet Diameter	mm	108	108
Pressurising Gas		Nitrogen	Nitrogen
Vent Valve diameter	mm	100-150	100-150	Needs rubber hose connection
Combined fill and drain	mm	?	?	Situated on top of tank – internal pipe extending from top to bottom
Water Port	mm	?	?	For tank flooding in an emergency
Leak Mitigation Mechanism				Tank covered in external plastic jacket to contain small leaks

[Issue 8; Configuration 10; 10th May 2010]

Definition	Unit	Target	Status 10th May 2010	Comment
Static Stability Index (Design Condition full with Fluids and Driver)	G	>1	1.025
Static Stability Index (Empty and Driver)	G	>1	1.021
Dynamic Stability Index (Design Condition full with Fluids and Driver)	G	>0.83	0.75	a.b/k^2 . where a & b are distance to axles from C of G, k is radius of gyration
Dynamic Stability Index (Empty and Driver)	G	>0.83	0.75	a.b/k^2 . where a & b are distance to axles from C of G, k is radius of gyration
Yaw Static Margin Aerodynamic (Design Condition full with Fluids and Driver)	%	3 to 5	?	Percentage of wheelbase
Yaw Static Margin Aerodynamic (Empty and Driver)	%	3 to 5	?	Percentage of wheelbase
Static Margin Vehicle Dynamic (Design Condition full with Fluids and Driver)	%	5 to 10	5 est	Percentage of wheelbase
Static Margin Vehicle Dynamic (Empty and Driver)	%	5 to 10	0 est	Percentage of wheelbase
Yaw Velocity Overshoot	%	4	?
Roll Gain	deg/g	<4	2.64
Rollover Resistance	G	≥0.8		Target supported by CFD study of Thrust SSC lateral G scenario using current CFD code.