Today's Message Index:
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1. 06:19 AM - Elevator position in cruise (Matthew Brandes)
2. 07:13 AM - Elevator position in cruise (James H Nelson)
3. 08:47 AM - Re: Elevator position in cruise (Matthew Brandes)
Message 1
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| Subject: | Elevator position in cruise |
--> RV9-List message posted by: "Matthew Brandes" <matthew@n523rv.com>
What are you flying RV-9'rs seeing for an elevator position in cruise? My counterbalance
arm is sticking up may 3/4"-1" in cruise at 2500. Sure seems like
a lot.
Can I fix that by adding a little more shim under the HS front spar?
Matthew Brandes,
RV-9A - N523RV
Hobbs: 15.3 Hours
www.n523rv.com
Message 2
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| Subject: | Elevator position in cruise |
--> RV9-List message posted by: James H Nelson <rv9jim@juno.com>
Hi Matt,
First, is this in a lightly loaded situation. Or is it in a max
loaded situation? If this is a lightly loaded condition, then shim stock
under the tabs on the front HS spar mounts would be required. You are
trying to raise the tail in the present condition so raising the front of
the spar is called for. Remember that the tail is designed to provide
down loading in normal flight configuration. It seems as tho you have
too much down loading and your elevators are trying to reduce it by
providing a lifting moment. Try several shims of say .010 to .020
thickness. Try one and go fly. Continue to adjust until you have a
slight downward positioning of the control horn in a lightly loaded
condition. Then, as you load the aircraft up the trim will center up the
control horn on the tail and as you approach full load, the horn will be
slightly displaced upward. I hope that makes sense. BTW, "coke cans"
are aluminum and are thin enough to be used as shim stock. Just clean
off the material so you don't have a sugar coating on anything. Prime it
also. I would probably make several shims, clean and prime them and then
go after the adjustments to the horiz. spar.
Jim
RV9-A (QB)
Message 3
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| Subject: | RE: Elevator position in cruise |
--> RV9-List message posted by: "Matthew Brandes" <matthew@n523rv.com>
Jim,
Yes, lightly loaded. It is me with 3/4 tanks. I'll make up a batch of shims and
play with it some.
Matthew Brandes,
RV-9A - N523RV
#90569
www.n523rv.com
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