Today's Message Index:
----------------------
1. 07:49 AM - Re:Re: Pitot Static Testing with Dynon (Leland)
2. 08:00 AM - Re:RV9 Empennage kit (Leland)
3. 08:33 AM - Re:RV9 Empennage kit (John Spicer)
4. 08:56 AM - Re: Re:RV9 Empennage kit (Albert Gardner)
5. 12:03 PM - Trim-- electric vs. manual (Richard Scott)
6. 12:40 PM - Re: Trim-- electric vs. manual (Richard Jones)
7. 01:40 PM - Re: Trim-- electric vs. manual (Carroll Neblett)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Pitot Static Testing with Dynon |
--> RV9-List message posted by: Leland <federigo@pacbell.net>
Steve, I only held the pressure until convinced that the ASI, VSI and
ALT readings were stable. I think the official test procedure allows a
10% leak after one minute. Sticking your tongue in those ports is not
comfortable. My procedure sounds ridiculous but I tried covering the
odd-shaped Dynon probe-tip with various plastic tubings and found that
they all leaked or slipped off. Removing lines from my installed pitot
probe for testing is not easy.
On Monday, the official pitot-static testing for the "FAA" documentation
will be conducted that will also include verification of the altitude
encoder and transponder. That testing will cost about $200. I just
wanted to be sure the system was OK before having that testing done.
Earlier, I had changed the battery in the Dynon and caused a leak in the
pitot system behind the panel.
Congratulations on your brief hops.
Leland
>Time: 10:52:47 AM PST US
>From: "Steve Sampson" <SSampson.SLN21@london.edu>
>Subject: RE: RV9-List: 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.
>
>
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re:RV9 Empennage kit |
--> RV9-List message posted by: Leland <federigo@pacbell.net>
Dave, the stiffness of the manual trim cable somewhat inhibits free
motion of the elevator. Even so, I installed the manual cable because
one of the Technical guys at Van's told me that the factory demonstrator
electric-trim tends to be touchy at cruise, even with the two-speed
circuit in place.
Leland
>
>Time: 05:07:49 AM PST US
>Subject: RV9-List: RV9 Empennage kit
>From: "EXT-Allen, David" <david.allen@boeing.com>
>
>--> 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
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re:RV9 Empennage kit |
--> RV9-List message posted by: "John Spicer" <spike@spikesplace.org>
I've flown a piper with electric trim and didn't like it at all as it was so
sensitive. I can think of many times in the Cessna when I've re-trimmed the
airplane with less than an 1/8th of a turn and would believe that in an
airplane
as responsive as the RV, hand trimming might give me a better feel. I ended up
deciding on manual trim for that reason.
-- John
www.rivetbangers.com - Building more than just RV's
www.spikesplace.org/cgi-php/serendipity - Builder's log
>
> ----- Original Message -----
> From: "Leland" <federigo@pacbell.net>
> To: <rv9-list@matronics.com>
> Sent: Thursday, March 10, 2005 10:53 AM
> Subject: RV9-List: Re:RV9 Empennage kit
>
>
> > --> RV9-List message posted by: Leland <federigo@pacbell.net>
> >
> > Dave, the stiffness of the manual trim cable somewhat inhibits free
> > motion of the elevator. Even so, I installed the manual cable because
> > one of the Technical guys at Van's told me that the factory demonstrator
> > electric-trim tends to be touchy at cruise, even with the two-speed
> > circuit in place.
> > Leland
> >
> > >
> >
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re:RV9 Empennage kit |
--> RV9-List message posted by: "Albert Gardner" <ibspud@adelphia.net>
I really like the electric trim on my 9A. I installed the module that drops
the voltage an adjustable amount and wired it to a micro switch on the
flaps: with flaps up you get very slow trim change, otherwise electric trim
is full speed. Works great.
Albert Gardner
RV-9A N872RV
Yuma, AZ
----- Original Message -----
From: "John Spicer" <spike@spikesplace.org>
> I've flown a piper with electric trim and didn't like it at all as it was
> so
> sensitive. I can think of many times in the Cessna when I've re-trimmed
> the
> airplane with less than an 1/8th of a turn and would believe that in an
> airplane
> as responsive as the RV, hand trimming might give me a better feel. I
> ended up
> deciding on manual trim for that reason.
> -- John
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Trim-- electric vs. manual |
--> RV9-List message posted by: Richard Scott <rscott@cascadeaccess.com>
For those with flying 9's, I would like to know how the plane flies at full
up and full down trim. Can you keep it level? Can you overcome the trim
adequately to climb with nose down trim and vice versa? In other words, if
you get a runaway trim situation, can you continue to fly safely until you
can land, even if that means flying half an hour or more? You can't in my
'41 Interstate Cadet, but trim in that is manual.
If it is too hard to overcome the trim, then for me the question of manual
vs. electric trim is simple: You'll never have a manual trim runaway on
you (of course the cable could break, but so could wires).
Richard Scott
9A wings
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Trim-- electric vs. manual |
--> RV9-List message posted by: "Richard Jones" <esnj@granbury.com>
Richard: That's exctly why I went with manual trim. I was really affraid
of a runaway trim problem. I've never tried full up or down trim in flight
and I think that I would not want to try it. After landing with about three
turns of up trim cranked in, the trim tab is down about 1/2 inch. On a go
around with this trim, I think that the stick force is probably 15 lbs or so
to keep the plane climbing at a reasonable rate. With side-by-side seating
and fuel tanks near the pitch balance point, you just don't have to do much
with the trim once you find a speed that you want. I am guessing that I
don't have to crank in more than three turns of down trim from 90 kts to 150
kts, but I've not actually counted. I don't know how much the electric trim
will move the tab from neutral to full up or full down, but if it's in the
order of an inch either way, you could have your hands full with a failure.
Dick Jones 90062
----- Original Message -----
From: "Richard Scott" <rscott@cascadeaccess.com>
Subject: RV9-List: Trim-- electric vs. manual
> --> RV9-List message posted by: Richard Scott <rscott@cascadeaccess.com>
>
> For those with flying 9's, I would like to know how the plane flies at
> full
> up and full down trim. Can you keep it level? Can you overcome the trim
> adequately to climb with nose down trim and vice versa? In other words,
> if
> you get a runaway trim situation, can you continue to fly safely until you
> can land, even if that means flying half an hour or more? You can't in my
> '41 Interstate Cadet, but trim in that is manual.
>
> If it is too hard to overcome the trim, then for me the question of manual
> vs. electric trim is simple: You'll never have a manual trim runaway on
> you (of course the cable could break, but so could wires).
>
> Richard Scott
> 9A wings
>
>
>
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Trim-- electric vs. manual |
--> RV9-List message posted by: "Carroll Neblett" <cneblett@erols.com>
I've bought and built the electric elevator trim, but have never been
fully comfortable with elevator control being subject to an electrical
problem (and the trim servo doesn't appear to be of very impressive
quality).
It may be a stupid idea as I've never seen or heard of it on any
aircraft, but I've often wondered what would be wrong with having electric
trim on one side and manual trim on the other. This would give the
convenience advantage of electric trim (if there is any) and the safety
advantage of manual trim. In the event of a runaway electric trim, it could
be offset with manual trim, but I have no idea what the drag and roll
effects would be of having extreme and opposite trims on the left and right
elevators.
If having both trim types would be aerodynamically practical, it
shouldn't add much cost, especially if Van's would allow the empennage kit
to be ordered with two "left" elevators.
Carroll Neblett
(waiting on wings)
----- Original Message -----
From: "Richard Scott" <rscott@cascadeaccess.com>
Subject: RV9-List: Trim-- electric vs. manual
> --> RV9-List message posted by: Richard Scott <rscott@cascadeaccess.com>
>
> For those with flying 9's, I would like to know how the plane flies at
> full
> up and full down trim. Can you keep it level? Can you overcome the trim
> adequately to climb with nose down trim and vice versa? In other words,
> if
> you get a runaway trim situation, can you continue to fly safely until you
> can land, even if that means flying half an hour or more? You can't in my
> '41 Interstate Cadet, but trim in that is manual.
>
> If it is too hard to overcome the trim, then for me the question of manual
> vs. electric trim is simple: You'll never have a manual trim runaway on
> you (of course the cable could break, but so could wires).
>
> Richard Scott
> 9A wings
>
>
>
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|