Today's Message Index:
----------------------
1. 05:03 AM - Plenum - Van's 360 baffle kit - "finger spacer" (Ralph E. Capen)
2. 05:41 AM - Recent Fatalities in NC (Ken Arnold)
3. 12:55 PM - Pitot leak check (James H Nelson)
4. 01:10 PM - Re: Pitot leak check (Ralph E. Capen)
5. 02:05 PM - Pitot leak check (James H Nelson)
6. 04:38 PM - Re: Pitot leak check (S Hamer)
7. 05:11 PM - Re: Pitot leak check (Richard Reynolds)
8. 05:39 PM - Re: Re: Controlling defrost fans (Carl Bell)
9. 06:47 PM - Re: Pitot leak check (Kelly McMullen)
10. 06:58 PM - Re: Carpet Security (HCRV6@comcast.net)
11. 08:03 PM - Re: Carpet Security (Vanremog@aol.com)
Message 1
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| Subject: | Plenum - Van's 360 baffle kit - "finger spacer" |
Folks,
I started working on my baffle kit yesterday as it will be the basis for my plenum.
The instructions call for a 1/4" 'finger spacer' on the back side of the first
panel outboard of the centerline to be riveted around (below) a bolt hole for
an AN4-15A bolt.
My Aerosport built (XP360 I'm fairly sure) IO360B1F6 isn't threaded there so I
know a nut/washer will also e required. Also, even with a 1/4" spacer, a 15 length
bolt will be way too long.
Anyone else find this? Is 1/4" thick a good size for the spacer? What length
bolt did you use?
Thanks,
Ralph
Message 2
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| Subject: | Recent Fatalities in NC |
Sad accidents the past few days. 6 fatalities near Mt Airy, NC and one
near Elkin, NC in RV-4. Write up in Mt Airy news paper.
do not archive
Message 3
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| Subject: | Pitot leak check |
I am doing the leak check on my pitot system. What are the usual guide
lines. Right now, I have a leak down at this rate: 50K to 45K in
+2 min. 110K to 105K in 50 sec. The only joints left are the screw on
nuts at both of my air speed indicators.
Jim Nelson
N15JN
Message 4
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| Subject: | Re: Pitot leak check |
I remember hearing that you are 'allowed' 100'/min on your static system.
I don't recall hearing anything on the pitot system.
Have you tried the ASI's independantly of each other? One of them may be bad....it
has happened......
I'll be monitoring this thread as I am interested too....
-----Original Message-----
>From: James H Nelson <rv9jim@juno.com>
>Sent: Feb 4, 2008 3:49 PM
>To: RV-List@matronics.com
>Subject: RV-List: Pitot leak check
>
>
>I am doing the leak check on my pitot system. What are the usual guide
>lines. Right now, I have a leak down at this rate: 50K to 45K in
>+2 min. 110K to 105K in 50 sec. The only joints left are the screw on
>nuts at both of my air speed indicators.
>
>
>Jim Nelson
>N15JN
>
>
Message 5
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| Subject: | Pitot leak check |
Yup, I'll need to make a close off fitting to do that. I think I will
do the Teflon grease on the tubing first and see how it does.
Jim
Message 6
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| Subject: | Re: Pitot leak check |
Jim,
Look in AC 43.13 if you have a copy. It's all in there. My book is at the
hangar and I don't want to rely on my memory to give you the info.
Steve Hamer
RV-6
Apple Valley, Ca
>
> I am doing the leak check on my pitot system. What are the usual guide
> lines. Right now, I have a leak down at this rate: 50K to 45K in
> +2 min. 110K to 105K in 50 sec. The only joints left are the screw on
> nuts at both of my air speed indicators.
>
>
> Jim Nelson
> N15JN
>
Message 7
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| Subject: | Re: Pitot leak check |
The pitot/static system tests are covered in FAR/AMT (Aviation
Maintenance Technicians). The FAR/AMT is a good book to have and is
available from Spruce, Sporties, etc.
FAR PART 23.1325(b)(2)(i) - Static Pressure System (Leak Test)
FAR APPENDIX E to PART 43 - Altimeter System Test and Inspection
These test are normally done by the avionic shop that "certifies"
your transponder but you will save boo coos of money if you have a
leak tight system before you go to the shop..
In accordance with FAR PART 23.1325(b)(2)(i), conducted proof test
demonstrating the integrity of the static pressure system. At 1000 ft
above airport elevation, The leakage was ----- ft in 1 minute. The
requirement is less than 100 ft in 1 minute.
Be very careful in applying pressure or vacuum to your system. You
can damage your instruments!
Richard Reynolds
Norfolk, VA
RV-6A 430 hrs.
On Feb 4, 2008, at 3:49 PM, James H Nelson wrote:
>
> I am doing the leak check on my pitot system. What are the usual
> guide
> lines. Right now, I have a leak down at this rate: 50K to
> 45K in
> +2 min. 110K to 105K in 50 sec. The only joints left are the
> screw on
> nuts at both of my air speed indicators.
>
>
> Jim Nelson
> N15JN
>
>
Message 8
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| Subject: | Re: Controlling defrost fans |
Mike,
Did you get a chance to make a couple of pictures, I bought the fans and
would love to see your installation. Thx C
Carl W Bell
New Venture Consulting
Mobile: 803.640.2760
www.newventureconsulting.com
carlbell@gforcecable.com
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of mikerv6a@ao.com
Sent: Monday, January 21, 2008 10:46 PM
Subject: RV-List: Re: Controlling defrost fans
Here is a simple two-speed fan control using an spdt switch. I'm using a
fan from DigiKey, cat no. 603-1055-ND that's 80mm square and 25.4mm
thick, about 3.15" x 1". It has ball bearings and relatively high airflow
for its size. Rated power at 12V for this fan is 6 watts. I measured fan
current at about 0.52A at 12.0 volts. The relationship between voltage and
current was close to linear down to 6V, and the fan continues to run at
still lower voltage. I chose 8V as a target votlage for "slow" speed, and I
found fan current to be about 0.33A at this voltage. Speed of these fans is
easily controlled either by providing variable voltage or by inserting a
resistor in series with the fan circuit. I used a 15-ohm 10-watt resistor
having an aluminum housing which includes tabs for mounting on a couple of
screws. This results in about 8.5 volts on the fan with 13.5V power bus
voltage. Power dissipation in this resistor is calculated to be about 1.7
watts. The reason for my "oversizing" the power rating of the resistor
I selected is that the built-in mounting provision for the 10W resistor is
very convenient. The resistor is DigiKey catalog no. 810F15RE-ND.
(Low Speed) Resistor
O--------------/\/\/\/------
/ |
-------------/ O (OFF) |
spdt switch |
w/ center-off O---------------------------
\
------------------------------- FAN--------
(Full Speed)
Mike Linse
RV-6A (canopy...)
Corvallis, OR
Message 9
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| Subject: | Re: Pitot leak check |
Only specs for altimeter and static system, not pitot, at least if you
are referring to Appendix E.
S Hamer wrote:
>
> Jim,
>
> Look in AC 43.13 if you have a copy. It's all in there. My book is
> at the hangar and I don't want to rely on my memory to give you the info.
>
> Steve Hamer
> RV-6
> Apple Valley, Ca
Message 10
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| Subject: | Re: Carpet Security |
Re Velcro, a word of caution. If you use the self stick kind you can expect it
to start shifting and slipping around before long and making a real mess, I'm
sure you can guess how I know. Get the Velcro that doesn't have an adhesive
backing and glue it down to stay with a good quality, like 3M, contact cement.
--
Harry Crosby
RV-6 N16CX, flying - 432 hours
-------------- Original message ----------------------
From: Richard Dudley <rhdudley1@bellsouth.net>
>
> Thanks to all who responded so far with a great variety of 9 approaches.
> I believe that I will try the Velcro approach next. It appears the
> easiest for me to me to try now while I have things apart for my annual.
> If that works for me I'll stop there. If not, I'll try one of the others
> that requires some more drilling and riveting.
>
> Best regards,
>
> Richard Dudley
>
>
>
>
>
>
Message 11
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| Subject: | Re: Carpet Security |
In a message dated 2/4/2008 7:00:33 P.M. Pacific Standard Time,
HCRV6@comcast.net writes:
Re Velcro, a word of caution. If you use the self stick kind you can expect
it to start shifting and slipping around before long and making a real mess,
I'm sure you can guess how I know. Get the Velcro that doesn't have an
adhesive backing and glue it down to stay with a good quality, like 3M, contact
cement.
===========================================
Or Gorilla Glue.
N1GV (RV-6A, Flying 883hrs, O-360-A1A, C/S, Silicon Valley)
**************Biggest Grammy Award surprises of all time on AOL Music.
(http://music.aol.com/grammys/pictures/never-won-a-grammy?NCID=aolcmp003000000025
48)
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