No different than you, I am certain - eyeball Mk.1 and the instrument provided. For instance here I would say here we have about 40% up input.
My observation shows that when you input half forward stick as observed on PFD you get full down deflection of the elevator on F/CTL page. I had tried to locate a reference in the manuals but did not find it.
The ground mode description you quote is indeed correct but please note that it does not say that "amount of side stick deflection commands the (elev) deflection in full range of travel". Rather it says "direct relationship". What kind of proportion or conversion factor is there in the relationship, if any, is not explained. There are other cases, where control to surface ratio is not 1:1 and/or varies with speed: RUD TRVL LIM, NWS spring to mind. Even the ground mode description of elev UP says that max. deflection is reduced by 75 knots to 66 % of travel.
As I said I cannot find written explanation of what I saw, ... but people are seeing things.
I will try to get a snapshot.
Back to the original question ss41 asked: Why does Airbus call for half or full elev DN for tkof? I comment that Airbus does nothing like that they ask us for half/full sidestick input - and no, that is not the same thing.
The reason for DN elev input (however large and achieved by whichever means) had been established. As the underslung engines introduce significant nose up moment the NW is unloaded. To re-introduce more weight onto NW, down elevator is applied. Even with aircraft stationary the engine exhaust provide sufficient airflow to achieve the desired effect.
but it really is FULL elev down for both cases at start of take-off roll.
Also I am pretty certain that half stick gives full elevator down with IAS=0.
I only substituted "start of take of roll" with "IAS=0" ?.
It is not necessary to dig any deeper until we can establish the facts. I shall get the photo and you will stop your next flight control check halfway stick down and observe elev pos on F/CTL page before proceeding as required. Deal?
Of course, all parties are sincerely welcome, AIDS Alpha callout would be nice or,
IFixPlanes where are you?
Oh, speaking A320 and not the other buses, are we?
Yours,
FD (the un-real)
Lord, I just hope so much I hadn't been seeing things, please, please...