aerodynamic question!

[harropster]

hi all, quick question for yas :E

when you make a turn to the left, the right aeliron goes down thus making the extra angle of attack, thus creating the more lift, while the left aeliron goes up

is this correct?

also

pushing the nose down, causes the elevator to deflect upwards

is that correct?

and left rudder pedel causes the rudder to deflect to the left (assuming you are still facing the front of the aircraft)

thanks for your help!
i am still a beginner pilot :)

[helopat]

when you make a turn to the left, the right aeliron goes down thus making the extra angle of attack, thus creating the more lift, while the left aeliron goes up

is this correct?

Spot on!

pushing the nose down, causes the elevator to deflect upwards

is that correct?

Lets think about this one. Push the yoke (or stick) forward, nose pitches down. Why? Because you've done something to make the tail pitch up. To do that you would've made the elevator deflect DOWNWARDS which causes the tail to rise.


left rudder pedel causes the rudder to deflect to the left (assuming you are still facing the front of the aircraft)

Again, spot on (except pedal is the correct spelling).

[maxdrypower]

Harropster, Best way to work all this out it to watch it happening , next time your up ask your instructor to carry out the actions and watch the control surfaces ,pictures paint thousands of words and all that , this is also imho certainly the best way to answer those , at times tricky trim tab questions on the exam . You are also probably best posting in the private flying forum a bit further down as most of the student ppl's seem to hang around there

[harropster]

hehe I have my PPL, just getting ready for the CPL Aerody exam!

I have just never looked at them while I have been flying!

Thanks for your help helopat!

[camel toe]

I've been taught to do a full and free movement on the control column and to check correct sense, ie everything moves in the right direction.
Aircraft have come out of maintenance in the past where things were connected in the wrong order and a when the control column turned to the right the aircraft rolled to the left. For me this is an important check eveytime I fly as I don't know who has been tinkering since the last time I flew.
Easy to do on low or high wing aircraft. In a low wing turn to the right and the right aileron comes up to "wave" at you, check to see if the lefty has dropped down. Repeat, and then check elevator/stabilator too.
I think you should also know which way the trim tabs move too, I don't just crank the wheel, I turn it and make sure it's actually doing something and in the correct direction too.
Camel Toe
"Over Macho Grande?"

[maxdrypower]

Camel Toe , top screename . As an ex engineer albeit of MilFJ I think the flying control surfaces would have to be seriously dismantled and rebuilt completely differently for the controls to work backwards . Its really a simple set up of cables bell cranks and other clever bits . I really cant see the controls being reversed. No restricted movement or even completely jammed absolutely hence full and free check at least twice prior to departure , any light a/c engs care to enlighten us as to whether this could happen

[Simon150]

Maxdrypower - see attached - page 13:-

http://www.caa.co.uk/docs/33/SRG_GAD_GASIL1OF2005PDF.PDF

I believe there was also an incident a few years ago where a Hawk from Valley went in shortly after take-off due to reversed aileron controls.

[Simon150]

I also remember crewing for a glider competition once, our particular aircraft used to get rigged/de-rigged every day, and you had to be very carefull to rig the ailerons up the right way. I think it was a Standard Cirrus.

[FREDSIMTH]

"hehe I have my PPL, just getting ready for the CPL Aerody exam!

I have just never looked at them while I have been flying! "




Are you really serious

[harropster]

Yep =/

Asked a few other mates, and they werent to sure either.

I mean I always check them before take-off, but I guess it just never really registered which way they deflected when I checked them :}

[Simon150]

I must say, I was a little suprised that having done your PPL, and are about to do your CPL Aerodynamics Exam (so presumably you have finished your studies), don't seem to have an appreciation for what most pilots would consider the absolute basics.

I have just done my ATPL exams, which I believe have some overlap in content, and this is something that you really need to understand as it forms the basis of much of Mass and Balance, Performance, General Knowledge etc. Get a good working level knowledge of the basiscs like this and you will find Commercial Exams much much (much) easier.

[NavPilot]

I'd check the control surface movements...the sense apart from free unrestricted movements,....during my pre-flight...AND Pre-T/o....why would someone not notice that....ever?:eek:

Given it is impractical to crane your neck to the extent possible,in the larger types...but that's just what a couple of A320 Lufthansa pilots should have done...and they realised that a bit after 'rotate'...just two switched wire connectors did the trick :ugh:...'fly-by-wire' it was..! luckily for them they came away unscathed. Now then, was that lufthansa or Air France...:confused: