---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Mon 02/04/08: 11 ---------------------------------------------------------- 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 _____________________________________ Time: 05:03:10 AM PST US From: "Ralph E. Capen" Subject: RV-List: 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 _____________________________________ Time: 05:41:59 AM PST US From: "Ken Arnold" Subject: RV-List: 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 _____________________________________ Time: 12:55:21 PM PST US Subject: RV-List: Pitot leak check From: James H Nelson 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 _____________________________________ Time: 01:10:36 PM PST US From: "Ralph E. Capen" Subject: Re: RV-List: 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 >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 _____________________________________ Time: 02:05:02 PM PST US Subject: RV-List: Pitot leak check From: James H Nelson 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 _____________________________________ Time: 04:38:19 PM PST US From: "S Hamer" Subject: Re: RV-List: 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 _____________________________________ Time: 05:11:37 PM PST US From: Richard Reynolds Subject: Re: RV-List: 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 _____________________________________ Time: 05:39:34 PM PST US From: "Carl Bell" Subject: RE: RV-List: 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 _____________________________________ Time: 06:47:28 PM PST US From: Kelly McMullen Subject: Re: RV-List: 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 ____________________________________ Time: 06:58:53 PM PST US From: HCRV6@comcast.net Subject: Re: RV-List: 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 > > 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 ____________________________________ Time: 08:03:46 PM PST US From: Vanremog@aol.com Subject: Re: RV-List: 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. 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