bustard and lucky spring to mind

🙂

coanda

thats about the size of it in my experience also moggy.

coanda

I have, for thursday,

The CAD realisation of three pieces for a machine tool casing

I have then to Mill two faces of one of those pieces, in a stupidly designed piece of CNC software and then write five or six pages about it.

Proper uni students ARE nocturnal, Havent been to sleep before 2 am, for well, 3 years nearly.

Majority of it bloody sober…..who thought it would be a good idea to do an engineering degree!

There is always tomorrow……until tomorrow arrives.

coanda

that is quite somthing!

thanxfor that its an excellent link, its immediatly going in my book marks!

coanda

excellent photo’s guys, looks like a great day for flying!

coanda

ahh they operate at more efficient speeds, arent required to burn as much fuel to get the requisite air through(supposedly!).

The very fact that the air isnt chanelled directly at the blade faces doesnt help matters.

they are probably loosing energy a fair amount by turning those hubs, overcoming friction in the bearings for the hubs etc etc, whilst also driving the compressor system inside the engine. (although there is less of a ‘high’ pressure section.)

its just not that much more efficient than anything else. I would imagine that there would be serious vibration problems requiring weighty props, and xtra padding in the fuselage walls, as the tips of the blades are probably reaching the speed of sound (even though the blade is allowed to go that much faster by sweeping the blade tips scimitar fashion. This vibration sensitivity would hold the blade to ransom on occasions such as turbulence.

coanda