Recent content by MattH150197

He seems to have made so many mistakes in the notes! I will use the notes you provided from now on, putting the loss in the denominator and entering a gain value gives a much more reasonable answer. Thank you very much for being so patient, you have helped tremendously!

Perhaps should have shown you this at the start but this is the formula I am going off

Ahh yeah sorry i see what you mean now it should be 1.99x10^-13 however I am still getting a fairly low value of 1891m this is what my whole equation looks like: 4th root (( 10x10^3 * 0.1^2 * 3.16) / (4pi^3 * 0.5^4 * 1.99^-13)) Am i right in assuming gain should be taken as 1 if not stated?

So SNR 13dB = 10log(Psignal/PNoise) and converting PNoise into Watts is what I am unsure of because i know you can't actually convert -130dbW into Watts so I am not sure if it converts as -1x10^14 or 1x10^-14 but the latter gave a more favourable result.

Sorry I am unsure if you still mean the losses is wrong or the Psig

Okay i can see where I've gone wrong for losses, 10log(y) = 5dB > y = 10^(5/10) = 3.16 is this correct? however I am unsure where I've gone wrong for the Psig

Homework Statement I am asked to find the Max detection range of the following radar system: Transmitter Power, Pt = 10Kw RCS = 1 m sq. Frequency = 3Ghz Losses, Ls = 5dB radar dish radius, r = .5m Noise level, N = -140dbW SNR= 13 dB Homework Equations Radar Max range =...

Oops! Sorry yeah I meant 12.5, I really have no idea where 9.5dB has come from and it was really frustrating why I was getting different. So thanks for clearing it up guys!

Homework Statement Im going over some revision for fibre optics and I've come across an example question to calculate the power margin of the system with the following info is given: transmitter power = -10dBm Connector loss = 1.5dB Attenuation = 3dB/Km Total length= 2KM Receiver threshold =...

Thanks this is extremely useful!

I actually used some of this for one of my modifications and saw pretty good results! I decided to compare my results to results obtained using xflr5 for the same wing to add something to my discussion. Thanks for your help guys!

Very good point and for example for the attached graph i have talked about how the rough surface doesn't produce lift as efficiently as the smoother conditions however the roughness seems to prolong the stall angle and how this may be due to roughness at the leading edge of the airfoil inducing...

Homework Statement I am doing a report on the effect of the surface roughness of a wing on the wing's performance. This was done by testing a a wing design in a wind tunnel using a smooth, intermediate and then rough surface. The test involved varying the pitch angle and tunnel power setting...

Ah yeah of course, thank you very much!

This is a diagram showing the location of the pressure readings.