Today's Message Index:
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1. 04:38 AM - Re: Elevator and joystick throw (John Hauck)
2. 05:06 AM - Re: Elevator and joystick throw (Richard Pike)
3. 06:36 AM - Re: Elevator and joystick throw (racerjerry)
4. 05:31 PM - Re: Elevator and joystick throw (B Young)
Message 1
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| Subject: | Elevator and joystick throw |
Gator/Kolbers:
I haven't heard of this problem before. Usually elevator function is right on
set up the way the plans and instructions indicate.
Elevator cables need to be tight. A tiny bit of slack in the elevator cables will
produce a lot of slop in fore and aft movement of the control stick.
Geometry should be right on unless someone has changed it from the stock set up.
Get someone to lock the elevator in place. Snug the elevator control cables until
there is no play, fore and aft, in the control stick.
You will be surprised how much this will improve elevator authority.
That's what I have discovered. That's what I did to correct the problem.
We recently made this correct to Larry Cottrell's FSII. I flew it loose, corrected,
and flew it tight. Flew like a new airplane after that.
John h
MKIII
Baldwinsville, NY
-----Original Message-----
From: owner-kolb-list-server@matronics.com [mailto:owner-kolb-list-server@matronics.com] On Behalf Of smgates
Sent: Saturday, June 29, 2019 2:13 AM
Subject: Kolb-List: Elevator and joystick throw
Hi all,
I've just finished building my Firestar II tandem and in the process of test flying.
One thing that the person test-flying initially has noted is that the elevator
authority feels a little limited, and 'spongy' feel at either extreme.
Flying here in W Australia can be very turbulent and windy much of the time and
he feels an improvement in the elevator authority would be useful.
The joystick has a cable pivot point separation of 3" and the elevator control
horn a cable pivot separation of 4". So we are thinking of increasing the joystick
pivot separation to around 4" also. However, this would mean having to raise
the front of the seat about 1/2".
Has anyone found a similar problem and if so how did you address it?
Thanks
Steve
--------
Gator
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489907#489907
Message 2
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| Subject: | Re: Elevator and joystick throw |
I would also help to gap seal the elevator to the stabilizer.
--------
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kolb Firefly Part 103 legal
Kingsport, TN 3TN0
Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489911#489911
Message 3
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| Subject: | Re: Elevator and joystick throw |
I built a very early Firestar II. I was kinda' disappointed that control cables
NOW rubbed on the bottom of the fuselage tube at the forward end. In the Kolb
Newsletter of July 1, 1995, Kolb suggested the addition of a control cable
fairlead made from Lexan sheet to keep control cables from rubbing on the aluminum
tube.
I got fed up and added a second row of 4 control cable pulleys to one of the fuselage
cross tubes to raise the cables and to enable me to properly tension the
elevator cables without fear of sawing either aluminum or Lexan.
Dunno' if my mod was necessary or even advisable, but it worked for me. Things
may have changed since then.
Jerry King
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Jerry King
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489915#489915
Message 4
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| Subject: | Re: Elevator and joystick throw |
>
> Before I started messing with cable locations I would put Vortex
> generators underneath the horizontal stabilizer in front of the hinge area
> and see if that increase your Authority I did that to my Mark 3 and it made
> a significant difference.
The v gs that I bought were stolspeed from John Gilpin in Australia. Try
https://stolspeed.com/installing-vortex-generators
Boyd Young
Mkiii Utah
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