what for ?

hello just to know in this video at 3'10, the nose wheels up ?

[ame]

Extending nose strut shortens take-off distance by about 50%...

According to the manual:

"Full hiking of the strut will add approximately 3 degrees to the angle of attack, which shortens takeoff runs."

(p. 1-63, T.O. 1F-5E-1-1)

It further says, that the strut will automatically de-hike when you put your gear up after takeoff and that the retraction time will be about 9 seconds (compared to 6 seconds with a non-hiked strut).

The short takeoff tests will be interesting for sure... :)

The checklist states the nose gear should be hiked before TO, but doesn't seem to mention anywhere when it should be dehiked. I'm guessing it's only needed for TO and the switch should be returned to the dehiked position all other times?

You don't need to manually dehike it after t/o, as this will be done automatically when you raise your gear (and I assume the spring-loaded switch will spring back to its dehiked-position).

And yes, the hiked strut is - afaik - only needed for takeoff or better to say short takeoff runs.

You don't need to manually dehike it after t/o, as this will be done automatically when you raise your gear (and I assume the spring-loaded switch will spring back to its dehiked-position).

And yes, the hiked strut is - afaik - only needed for takeoff or better to say short takeoff runs.

Not quite what I was asking, I know the gear will retract either way.

The checklist refers to the aircraft being started with the switch in the dehiked position, and it being moved to hike for take-off. There don't appear to be any further references. Is it supposed to remain hiked for landing/taxi etc?

Is it supposed to remain hiked for landing/taxi etc?

It won't make sense to land with an hiked nose gear strut. It's sole purpose is to shorten your takeoff run by giving you additional 3 degrees aoa.

This is why I think the switch will behave exactly as I mentioned earlier and just like bbrz said:

snaps back to the dehiked position once the plane is lifting off.

So, there is no need for further references of this switch in the manual or checklists, as the takoff is the only time you actually use it and it will dehike itself automatically upon raising the gear.

I know it wouldn't make sense to land with the gear hiked, just surprised there's no mention of the switch being moved after takeoff.

The switch being held electromagnetically would make sense, it's just not specifically described as working in this manner.

Excellent, thanks for the info.

As we understand, it works this way. Electromagnetically held in hiked position. It is automatically switched off when weight is not on wheels, so, just after takeoff.

Nice!:thumbup: