Recent content by ra180

1. Fuels and Engine efficiency Mechanical Engineering

I needed to convert it for my equation. Is my answer correct or not?
2. Physics problem involing a lotus car need help

Homework Statement When the a lotus is driven at average speed of 20 m/s the drag force on the vehicle is 400N. If the average fuel conversion is 13% then calculate the distance traveled by the vehicle. Mass of Vehicle = 903kg Volume of fuel tank= 43.5 litre Density of fuel= 775 kg/m^3...
3. Fuels and Engine efficiency Mechanical Engineering

Homework Statement Car (A) C180K WITH A 1.8 litre supercharged spark ignition, Maximum power output 104kw, based upon standard fuel efficiency test a vehicle with this engine would consume 6.1 liters over 100k journey Car (B) C220 CDI with a 2.0 litre turbocharged diesel engine. Maximum...
4. Boundary Thickness Questions

Calculate the thickness of the boundary Layer δ at a location x= 0.3m along the chord length of an aircraft wing at each of the following velocities. (u = 20, 40,60,80,100 knots) Assume ISA P=101325 R=287 T=288.5 μ =18 x 10-6 (1)Re transition=5 x 10^5 (2)δ Laminar = x 4.91 Rex^-0.5 (3)δ...
5. Reynolds number calculation for undergraduate

Would you believe that is the next question should I start a new thread or continue posting here?
6. Reynolds number calculation for undergraduate

Sorry guys I have been really busy here is my answer. Assuming ISA P= 101325pa ,R= 287 J/kgk and T=288.15K Convert knots into meters per second (1) 20 knots= 10.29/ms, 40 knots =20.58m/s 60 knots= 30.87 m/s 100 knots =51.44 m/s (2) Using the formula R= ρux/μ where (ρ= P/RT) (u= velocity in...
7. Reynolds number calculation for undergraduate

Thanks Travis can i post photos of calculations i have tried?
8. Reynolds number calculation for undergraduate

Calculate the Reynolds number at a location χ= 0.3m along the chord length of an aircraft wing at each of the following velocities;u= 20,40,60,80 and 100 knots. Assume International Standard Atmosphere (ISA) conditions for pressure and temperature. Take; R =287 J/KG;μ= 18 X10 -6 Kg/m s; 1 knot =...