Today's Message Index:
----------------------
1. 05:07 AM - RV9 Empennage kit (EXT-Allen, David)
2. 05:43 AM - Re: RV9 Empennage kit (Peter Mather)
3. 05:56 AM - Re: RV9 Empennage kit (Matthew Brandes)
4. 07:27 AM - manual trim knob (jc@INFONET.COM.BR)
5. 07:28 AM - Re: Re: RV9 Empennage kit (rv-9a-online)
6. 10:02 AM - Re: Re: RV9 Empennage kit (Nigel Goad)
7. 10:03 AM - Re: manual trim knob (Richard Jones)
8. 10:52 AM - Re: Pitot Static Testing with Dynon (Steve Sampson)
9. 01:29 PM - Re: manual trim knob (Matthew Brandes)
10. 02:32 PM - manual trim knob (jc@INFONET.COM.BR)
Message 1
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| Subject: | RV9 Empennage kit |
--> RV9-List message posted by: "EXT-Allen, David" <david.allen@boeing.com>
I'm about ready to order the tail kit and noticed the electric elevator
trim option.
Does anyone have any pros or cons to share about this option?
Is there anything wrong with the manual trim, etc.
Dave Allen
Message 2
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| Subject: | Re: RV9 Empennage kit |
--> RV9-List message posted by: "Peter Mather" <peter@mather.com>
Dave
I think one of the cons of the manual is having to run control wires forward
rather than just electric cables
Best Regards
Peter
----- Original Message -----
From: "EXT-Allen, David" <david.allen@boeing.com>
Subject: RV9-List: RV9 Empennage kit
> --> RV9-List message posted by: "EXT-Allen, David"
> <david.allen@boeing.com>
>
> I'm about ready to order the tail kit and noticed the electric elevator
> trim option.
>
> Does anyone have any pros or cons to share about this option?
> Is there anything wrong with the manual trim, etc.
>
> Dave Allen
>
>
>
Message 3
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| Subject: | re: RV9 Empennage kit |
--> RV9-List message posted by: "Matthew Brandes" <matthew@n523rv.com>
Dave,
This is only the first off many decisions you will have to make in the
building process.. each has its pros and cons and most just come down to
builder preference. I chose the manual trim. The manual trim uses a thick
cable that runs from the fuel selector area to the trim tab. The trim is a
large black knob that you twist to adjust. The manual trim cable weighs
more than the electric trim option and takes up some room by the fuel
selector but a good option. (It also takes up one of the wire run holes, so
if you select this option, make an additional wire run hole in the center
section when you get to the fuse.)
The electric trim uses a servo mounted in the elevator. Lightweight, can be
controlled from your stick grips if you get a fancy one. I hear they are
overly sensitive and can be hard to get right but you can buy a little box
to control the how fast it moves. Also, I believe the newer autopilots from
TruTrak and Trio can automatically adjust your trim if you use the electric
trim option... so that might sway you if you are going to use an autopilot
with that option.
In the end, do you want to use a switch/rocker to control the trim or just
twist a knob?
Good luck and have fun!
Matthew Brandes,
Van's RV-9A (Finish Kit)
EAA Chapter 1329 President
EAA Chapter 868 Web Editor
www.n523rv.com <http://www.n523rv.com/>
Message 4
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| Subject: | manual trim knob |
--> RV9-List message posted by: jc@infonet.com.br
Hi there:
The manual instructs to remove the plstic cover on top of manual trim knob in order
to
unlock the disangage mecanism from vernier.
Ive tried to do it using a small screw driver and give up.
You people have another ideia?
Thanks in advance.
JC - Aracaju - Brasil
RV-9A QB
#90997
Fuse
http://websites.expercraft.com/jcmm/
Message 5
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| Subject: | Re: re: RV9 Empennage kit |
--> RV9-List message posted by: rv-9a-online <rv-9a-online@telus.net>
A couple of comments:
Van's advises not to drill any more holes in the spar carry-through for
wiring, although they have said that the existing ones could be enlarged.
The practical result is that manual trim reduces the ability to route
wiring quite substantially.
The other negative of manual trim is that the trim knob and it's
mounting will dig into your body when you are upside down working
underneath your panel. I made a removable tab on the fuel selector box
so that if I have to work under the panel, I just remove it and lay the
assembly on the floor.
I still prefer manual trim, but like everything else, you have to weigh
the trade-offs.
On an amusing note, the trim cable has a note on it 'not for aircraft
use'. Go figure.
Vern Little, RV-9A
Matthew Brandes wrote:
>--> RV9-List message posted by: "Matthew Brandes" <matthew@n523rv.com>
>
>Dave,
>
>This is only the first off many decisions you will have to make in the
>building process.. each has its pros and cons and most just come down to
>builder preference. I chose the manual trim. The manual trim uses a thick
>cable that runs from the fuel selector area to the trim tab. The trim is a
>large black knob that you twist to adjust. The manual trim cable weighs
>more than the electric trim option and takes up some room by the fuel
>selector but a good option. (It also takes up one of the wire run holes, so
>if you select this option, make an additional wire run hole in the center
>section when you get to the fuse.)
>
>The electric trim uses a servo mounted in the elevator. Lightweight, can be
>controlled from your stick grips if you get a fancy one. I hear they are
>overly sensitive and can be hard to get right but you can buy a little box
>to control the how fast it moves. Also, I believe the newer autopilots from
>TruTrak and Trio can automatically adjust your trim if you use the electric
>trim option... so that might sway you if you are going to use an autopilot
>with that option.
>
>In the end, do you want to use a switch/rocker to control the trim or just
>twist a knob?
>
>Good luck and have fun!
>
>Matthew Brandes,
>Van's RV-9A (Finish Kit)
>EAA Chapter 1329 President
>EAA Chapter 868 Web Editor
>www.n523rv.com <http://www.n523rv.com/>
>
>
>
>
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Message 6
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| Subject: | Re: re: RV9 Empennage kit |
--> RV9-List message posted by: Nigel Goad <sirlegin@sbcglobal.net>
I think the bottom line is if you plan on a 2 axis auto pilot you will need the
electric trim. If not, manual trim is good.
Message 7
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| Subject: | Re: manual trim knob |
--> RV9-List message posted by: "Richard Jones" <esnj@granbury.com>
I think that you have to take the assembly pretty well apart to get the
center button and release rod out. After doing this, I cut a piece of 1/16
clear plastic and used my computer to print the word "TRIM' and smaller
font "UP" & "DOWN" with arrows on a piece of paper and inserted this in the
hole where the button was...Dick Jones-90062
----- Original Message -----
From: <jc@INFONET.COM.BR>
Subject: RV9-List: manual trim knob
> --> RV9-List message posted by: jc@infonet.com.br
>
> Hi there:
> The manual instructs to remove the plstic cover on top of manual trim knob
> in order to
> unlock the disangage mecanism from vernier.
> Ive tried to do it using a small screw driver and give up.
> You people have another ideia?
> Thanks in advance.
> JC - Aracaju - Brasil
> RV-9A QB
> #90997
> Fuse
> http://websites.expercraft.com/jcmm/
>
>
>
Message 8
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| Subject: | Pitot Static Testing with Dynon |
--> RV9-List message posted by: "Steve Sampson" <SSampson.SLN21@london.edu>
Leland - how long did you hold the pressure for? (It sounds like a great
cartoon with you and your tounge stuck in the RV!)
In one sense I never did manage to test it. I have tested it to the pitot by
disconecting it and subsequently a high speed taxi in which it accidently
flew a few yards.
Steve.
-----Original Message-----
From: owner-rv9-list-server@matronics.com
[mailto:owner-rv9-list-server@matronics.com]On Behalf Of Leland
Subject: RV9-List: Pitot Static Testing with Dynon
--> RV9-List message posted by: Leland <federigo@pacbell.net>
A few months ago Steve Sampson asked how he could verify the integrity
of his pitot system with the Dynon AOA probe installed. Steve probably
figured out how to do this already, but here my procedure. Using
cellophane tape, tape over the two drain holes in the bottom of the
probe, tape over the AOA orifice, and run tape around the junction
between the probe body and the forward cap of the probe. (The rest of my
probe is potted with RTV and did not leak.) Then with somebody looking
at the ASI, blow into the pitot tip and then plug up the orifice with
your tongue. Don't blow too hard as you may come off scale. If there are
no leaks, the ASI will holds its value.
Similar procedure for the static system. Tape over one of the static
ports. Put you mouth over the other port and suck, then stopper the hole
with your tongue. There may be an initial decrease as the VSI leaks its
air internally, then the altimeter should hold steady.
Leland
Almost ready for the FAA inspection
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Message 9
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| Subject: | re: manual trim knob |
--> RV9-List message posted by: "Matthew Brandes" <matthew@n523rv.com>
JC, what instructions are you reading that says this? Can't say that I
remember see'in this anywhere... is there something we are supposed to
remove from the trim knob???
Matthew Brandes,
Van's RV-9A (Finish Kit)
EAA Chapter 1329 President
EAA Chapter 868 Web Editor
www.n523rv.com <http://www.n523rv.com/>
Message 10
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| Subject: | manual trim knob |
--> RV9-List message posted by: jc@infonet.com.br
Hi Matthew:
Just now Im in Aracaju, main city from Sergipe state, 250NM from my kit and manual.
Tomorrow Ill be building again. Im a petroleum eng. and work on offshore rigs.
the manual in chapter 8, fuse, ask usto remove the unlock mecanism from vernier
system
in order to operate the trim safely. I believe that is possible to push the knob
in a
very turbulence situation.
There is a pin connecting the push/pull unlock button on top of vernier that must
be
removed. To access this pin and rod we need to remove the rubber cap on top of
vernier.
Its a problem only for elevator manual trim instalation.
Ill send you more details about it.
JC - Aracaju - Brasil
RV-9a QB
#90997
http://websites.expercraft.com/jcmm
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