I’m no PPL holder but this bit of info i was given holds true no matter what the test, its not the examiner that fails you, its you that fails you.
as said in above posts just make sure you are ready, learn from the mistakes you have made in the past, learn from others mistakes you have learned about. and your license when you get it isn’t a license to say you know how, it’s a license to keep learning.

hope this helps.

Greg

Any time mate, no worries. Just thinking, it over revs?. is this at idle? or if an auto box when you are driving and its changing up late?. if the first have the airflow sensor checked, the second could be either its stuck in ‘kick down’ mode or the box needs looking at by a speciallist. i don’t know much about auto boxes but from what i understand (and i am willing to be corrected here) there are small journals and ball valves in there and the valves are opened by vaccum and the vaccum may be low or maybe the fluid has become thin over time?. as i said i am no expert on Auto boxes so i would get it checked out if that is the case..

hope this helps.

Greg

And if you really want a headache try this one.

http://en.wikipedia.org/wiki/Jet_engine_performance

edit, Forgot to mention but as far as i remember Boyles law does not include equations for the combustion of the gasses, just the heating of.

hope this helps.

Greg

Basically its expanding in a confined space, (the volume is no longer a constant as the combustion causes the gas to expand), thus increasing the pressure. as the presure is higher at the chamber inlet than it is at the outlet the gas escapes through the path of least resistance, ie, out the back. please don’t ask me to do the equations for it cos i really do not even want to attempt it, its been 25 years since i had to tackle them things and i ain’t going to start now. 😉

here’s some basic stuff. for thickies like wot i is. :rolleyes: 😉 😀

http://www.grc.nasa.gov/WWW/K-12/airplane/aboyle.html

a bit more in depth but this may help.

http://library.thinkquest.org/12596/combined.html

hope this helps.

Greg

the MKXVI is looking real nice Fluffy, great work by you guys at the flight, heres a couple of pics i have of her,

first time i saw her, (why does that remind me of a rather old and vulgar song i know 😉 )

and the last time, not that long ago really.

with the black colours she would have looked good like this maybe? 😮 😀

all the best.

Greg

I will check on this with the guy who was taking ownership of her, not sure when this will be as he works long hours. sorry i can’t be of more help.

Greg