Recent content by Breadboard

Surely with the 80 pounds excess lift capacity alluded to on the page, incorporating blade jettisoning and a parachute assembly would not be impossible.

I agree in principle, but disagree in general! :rolleyes: Yes, building something like a small personal air vehicle of whatever type, would certainly involve a huge amount of work, and be quite expensive. But the parts and equipment are commercially available, and a design simply needs to...

Thanks Rainman. That has cleared up a huge amount. So this is the equation I need: Ct = T / p . n^2 . D^4 Where: Ct = Thrust Co-Efficient T = Thrust p = rho n = rev per sec D = Diameter I will e-mail the prop manufacturer today and get a value for Ct. Once I have Ct and solve for...

I say go to a lawyer and get them to sort it out. They're not free, but if your friends looking for $25k from this creep, then the laywers fees are small in proportion. You'll need a laywer anyway if your going to sue his ass. Let the cops throw him in jail and punish him, let your friends...

Fantastic University. Looks really great. But you have an armoury?...must be an American thing. :)

Rainman thankyou very much for all your help so far. Ironically another site has just given me a formula also. Literally within the last 5min after trying to locate this for over a month I have two! lol Anyway, I need to calculate the values for the object to rise vertically from a stationary...

I think I may be mixing up my constants and my formula, but my memory is a bit hazy about this! Anyway, I know the force required to push up, because I can convert my objects weight into Newtons pushing down. Therefore the force pushing up must be larger by any amount that that pushing down. But...

Thanks for the reply Astronuc. Yes its kind of like a helicopter. However it has a fixed prop, not a variable pitch prop as in a heli. Therefore the calculations should be simpler. To phrase it differently, I want to calculate the thrust necessary using my set of fixed values which I know...

No ideas anyone?

Calculating necessary Power to generate required Thrust Hello, This is my first post on this site and I hope someone can help. I am building an experimental air vehicle for my final dissertation in my Transport Engineering degree course. I am trying to track down a formula I need but can't...