Jump to content

Collective resistance.. How much is needed???


seldridge1960
 Share

Recommended Posts

Hey, for some of the real time helicopter pilots out there.....

 

I recently installed a collective control in my sim pit for the Huey. It takes a fair amount of pressure to lift and depress the rod. What is considered "normal" resistance for the real collective for the Huey?

Birdstrike = Chicken Sandwich!

Link to comment
Share on other sites

Being generous I'd say 2 pounds...maybe a little less. I could probably get a spring scale and check, but it's hot out and I'm too lazy to hook up the hydraulics. ;)

 

EDIT: This is with the trim release button pressed.

 

EDIT #2: Duh, you said collective, so no trim button. In the case of the collective, it depends on what you've set the friction to. Somewhere between "it falls on it's own when you let go of it due to gravity" all the way up to "the AFCS check fails because it can't overcome the friction".

 

EDIT #3: Bad day for me, of course this version doesn't have AFCS. But you can tighten the friction on the collective all the way to the point where you won't be able to move it without some serious adrenaline. Most pilots set it somewhere in between based on preference. Usually just enough so it stays put when they let go of it, but they can still move it fairly easily and precisely without hamfisting it.


Edited by AlphaOneSix
Link to comment
Share on other sites

In the H model the collective shouldn't fall with the friction fully wound off.

 

The maintainers use a spring gauge to ensure 8-10 lbs of force is required to move the collective with friction wound off.

 

Do you have a fishing scale handy? :)

 

- Bear

Pacifism is a shifty doctrine under which a man accepts the benefits of the social group without being willing to pay - and claims a halo for his dishonesty.

 

- Robert A. Heinlein

Link to comment
Share on other sites

In the H model the collective shouldn't fall with the friction fully wound off.

 

The maintainers use a spring gauge to ensure 8-10 lbs of force is required to move the collective with friction wound off.

 

Do you have a fishing scale handy? :)

 

- Bear

 

I wonder if the collective on the 412 works the same? I don't have any experience on Hueys except for the 412, but I do know that if you loosen it all the way, it sometimes droops down on its own, so our pilots add friction, then leave the friction on during the AFCS check, which promptly fails because it can't move the collective.

Link to comment
Share on other sites

In theory it's the same, though I can't remember the exact amount of breakout force for the 412.

 

In practice... I've been civilian for the last three years and no two 412 collectives have felt the same. :)

 

Also our AFCS has no collective input so maybe that's also a reason for any difference. Amount of force doesn't have to be as exact if you're not involving AFCS actuators, just the ham-fisted monkeys in front. :)

 

- Bear

Pacifism is a shifty doctrine under which a man accepts the benefits of the social group without being willing to pay - and claims a halo for his dishonesty.

 

- Robert A. Heinlein

Link to comment
Share on other sites

You could use that friction setting for hydraulics off. :)

 

- Bear

Pacifism is a shifty doctrine under which a man accepts the benefits of the social group without being willing to pay - and claims a halo for his dishonesty.

 

- Robert A. Heinlein

Link to comment
Share on other sites

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...