Recent content by Daveami

Thanks for the reply, I have looked at CL with respect to the moment as well as working out the dynamic wind pressure of the tunnel and multiplying this with the area of the wing and a drag co-efficient. Just wondering how well it will relate to practice measurements. Thanks for your help! Dave

Hello, I am designing a rig to measure the rolling moment of a model aircraft. The rig will have a settable yaw, pitch and roll, but only the rolling moment is to be measured. The model aircraft will be similar to an Airfix model. Approx dimensions: L221 x W152. I was just wondering if anyone...

Dont worry about this one, I have now solved it!

Hi there, Would anyone be able to help with the below problem. Vertical cylinder, closed at the lower end, fitted with a frictionless piston of mass 200kg and cross-sectional area 0.1m^2. The cylinder contains air which is heated such that its state changes and the piston rises through...

Ah brilliant! Thanks for the help mate!

Hi there, I am having difficulty with one aspect of intergration by substitution where the substituion of a square root is U^2, wondering if anyone can help. Problem: Integral of: 2x√(3x-4) dx by substituting U^2 = 3x-4 Would du^2/dx = 3 therefore 1/3 du^2 = dx (I think...

Brilliant, thank you both for your help!

Hi, Would anyone be able to explain the main differences between the effect of electrons and photons colliding with atoms in the ground state. As far as I understand they are very similar as both cause excitation and in some cases ionization. Any help would be greatly appreciated. Dave