Throttle correlator

Service and maintenance tips, questions, and issues.

Moderator: Ron Spiker

Throttle correlator

Postby seneca2e » Sun Jan 20, 2013 7:37 pm

Do you have to have a decent amount of throttle friction on to enable your throttle correlator to work? In other words if you just lift the collective with NO throttle friction does your throttle roll off(if you don't hold it and prevent if from rolling)-thus preventing the correlator from adding throttle? This is the way it is designed but just wondering how much throttle friction you have to use to get it to work correctly?
seneca2e
 
Posts: 389
Joined: Mon Feb 11, 2008 10:35 pm

Re: Throttle correlator

Postby Ron Spiker » Mon Jan 21, 2013 4:17 am

I never use any throttle friction at all, and the correlator works just fine.
User avatar
Ron Spiker
Site Admin
 
Posts: 527
Joined: Sat Mar 22, 2003 5:33 pm
Location: Pittsburgh, PA

Re: Throttle correlator

Postby Brad Bowles » Mon Jan 21, 2013 7:18 am

I agree with Ron. It should work fine with friction off.
Brad Bowles
 
Posts: 82
Joined: Sun Dec 10, 2006 9:20 pm
Location: Georgetown TX

Re: Throttle correlator

Postby bryancobb » Mon Jan 21, 2013 10:16 am

seneca2e wrote:... In other words if you just lift the collective with NO throttle friction does your throttle roll off...


Mine did this when I first bought it. After removing the engine, I found out the throttle cable was routed wrong and was binding.
I routed the cable housing correctly and shot some motorcycle cable lube inside the housing and after that it worked fine.
Always a chance yours got kinked.
YHO-3BR Pilots International
User avatar
bryancobb
 
Posts: 283
Joined: Thu Feb 27, 2003 8:23 pm
Location: Cartersville, Georgia

Re: Throttle correlator

Postby seneca2e » Mon Jan 21, 2013 2:02 pm

Interesting by comparison the Enstrom F model which has the correlator specifically says you must use enough throttle friction to enable the correlator to work so I figured it was the same in the Brantly. I hold the throttle stiff enough for the correlator to work but wondered if this was typical for the Brantly. Sounds like its not.
seneca2e
 
Posts: 389
Joined: Mon Feb 11, 2008 10:35 pm

Re: Throttle correlator

Postby seneca2e » Mon Jan 21, 2013 5:15 pm

Well upon further inspection I believe mine is working correctly. You should have a little friction on the throttle to keep it from rolling. If yours does(did) not it must have been naturally stiff enough to prevent it from rolling off. I have mine well lubricated so maybe that's why mine is low enough friction it has to have a little added via the friction knob to prevent it rolling off. If I understand you guys with the friction completely off if you put one finger under the collective aft of the twist grip and raise the collective you're saying the throttle doesn't roll at all? That means your throttle twist grip has a certain amount of friction already built in. This arrangement adds throttle when you raise the collective and the twist grip is not allowed to move. Of course the pilot can always roll throttle in either direction by twisting the throttle as well.
seneca2e
 
Posts: 389
Joined: Mon Feb 11, 2008 10:35 pm

Re: Throttle correlator

Postby Ron Spiker » Mon Jan 21, 2013 5:29 pm

I have never used any throttle friction whatsoever in any of the dozen plus Brantlys I've flown, and the correlator works just fine as I raise the collective. I don't know (or care, really) if the throttle grip actually moves slightly one way or another as the collective is being raised, but the engine RPM does increase unless I purposefully prevent it, so I know it is working.
User avatar
Ron Spiker
Site Admin
 
Posts: 527
Joined: Sat Mar 22, 2003 5:33 pm
Location: Pittsburgh, PA

Re: Throttle correlator

Postby bryancobb » Mon Jan 21, 2013 8:19 pm

Well,
Don't feel bad if you desire to manipulate the collective without any movement in the twist grip. Everybody has different ways they like their coffee.
My personal taste (not that it matters), is having both the collective and throttle frictions fairly snug so I can totally remove my hand from the collective for extended periods during cross country flight. I swapped hands on the cyclic to mess with radios and the GPS.

The friction knob is there for a reason and if you need to add a little, that's fine.
YHO-3BR Pilots International
User avatar
bryancobb
 
Posts: 283
Joined: Thu Feb 27, 2003 8:23 pm
Location: Cartersville, Georgia

Re: Throttle correlator

Postby Ron Spiker » Mon Jan 21, 2013 8:40 pm

I agree. It's there if you want to use it/them. I take my hand off the collective/throttle all the time and the throttle never moves. I always have a bit if collective friction on for that purpose (so the collective stays put). I've just never had a need to use the throttle friction. The correlator works without use of the friction and I've never seen the throttle move on its own when I do remove my grip. I was just replying to the OP. I haven't seen the need for the throttle friction to be on in order for the correlator to work.
User avatar
Ron Spiker
Site Admin
 
Posts: 527
Joined: Sat Mar 22, 2003 5:33 pm
Location: Pittsburgh, PA

Re: Throttle correlator

Postby seneca2e » Mon Jan 21, 2013 9:23 pm

I was just curious if you raise the collective as I described with your fingers not on the twist grip(engine not running) does the throttle roll off as you raise the collective. On a R22 it doesn't move at all but on a Enstrom 28F and at least on my Brantly it does. A bit of throttle friction or just a semi-firm grip allows the corellator to work just as it was designed. Looking forward to comparing Brantlys going forward. It was slow on the board and we had to talk about something lol.
seneca2e
 
Posts: 389
Joined: Mon Feb 11, 2008 10:35 pm


Return to Servcing and Maintaining

Who is online

Users browsing this forum: No registered users and 1 guest

cron