---------------------------------------------------------- RV9-List Digest Archive --- Total Messages Posted Mon 04/21/03: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:50 AM - Re: Glide Ratio 9A (Bob Kelly) 2. 08:38 AM - prop question (DThomas773@aol.com) 3. 09:01 AM - Re: Glide Ratio 9A (Chris W) 4. 08:54 PM - Flap miscellaneous questions... (Richard E. Tasker) 5. 09:23 PM - RiteAngle AoA (Ralph Cloud) 6. 09:59 PM - ELT mounting (Leland) ________________________________ Message 1 _____________________________________ Time: 07:50:00 AM PST US From: Bob Kelly Subject: Re: RV9-List: Glide Ratio 9A --> RV9-List message posted by: Bob Kelly Jim, Not measured data, but taking Van's numbers of 500 fpm min sink at around 65-70 mph, you come up with something in the 12-14:1 range. Bob Kelly Still tooling On 21-Apr-03, Jim Hosie wrote: > --> RV9-List message posted by: "Jim Hosie" > > HI, > Has anyone got the point of measuring the glide ratio of a 9A? > Thanks > Jim > ________________________________ Message 2 _____________________________________ Time: 08:38:50 AM PST US From: DThomas773@aol.com Subject: RV9-List: prop question --> RV9-List message posted by: DThomas773@aol.com Is anyone out there flying an RV9 with a 150 horse with a fixed pitch prop. Looking at the catologue they recommend 77" pitch,but I wonder if I couldn't get away with a bit more. Dennis Thomas fuselage ________________________________ Message 3 _____________________________________ Time: 09:01:43 AM PST US From: Chris W Subject: Re: RV9-List: Glide Ratio 9A --> RV9-List message posted by: Chris W Bob Kelly wrote: > Jim, > > Not measured data, but taking Van's numbers of 500 fpm min sink at around > 65-70 mph, you come up with something in the 12-14:1 range. Not acording to my calculations. First I am assuming that the 65-70 mph is true air speed. 1 mph = 88 fpm so 65 mph = 5720 fpm dividing that by 500 fpm, you get 11.44:1 glide ratio. 70 mph = 6160 fpm and dividing that by 500 fpm, you get a glide ratio of 12.32:1. Just call it 12:1, a heck of a lot better than your average spam can! -- Chris Woodhouse 3147 SW 127th St. Oklahoma City, OK 73170 405-691-5206 chrisw@programmer.net N35 20.492' W97 34.342' "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -- Benjamin Franklin, 1759 Historical Review of Pennsylvania ________________________________ Message 4 _____________________________________ Time: 08:54:03 PM PST US From: "Richard E. Tasker" Subject: RV9-List: Flap miscellaneous questions... --> RV9-List message posted by: "Richard E. Tasker" I am finishing the flaps for my RV9A and find that the left flap ends up with a slight twist - maybe 1/8 tp 3/16 at the tip. I know Van's cautions against twist, but is this too much or am I being too picky. I suspect that I know what caused this - the left inboard nose skin was much wider open than the other nose skins and when I clecoed everything together I had to really horse it in and it put an uneven strain on the assembly, causing the slight twist. The drawing for the W-917 pushrod assembly shows a length of 94 7/32". One end of the dimension points to the center of the bearing while the other end points to some indeterminate point on the side of the bearing. Should the length be measured from center to center of the bearings or is it not that critical? The flaps are mounted with a drilled bolt, two washers and a castellated nut. If I tighten down the nut on the assembly the cotter pin is basically above the castellations on the nut. How tight is the nut supposed to be? Or should it be left loose so the cotter pin actually goes through the castellations? If I make it loose enough for the cotter pin to work properly, the assembly will have about 0.075-0.10' extra space. Or should I use thicker washers? Thanks, Dick Tasker, 09573 Left wing (almost done) ________________________________ Message 5 _____________________________________ Time: 09:23:55 PM PST US From: "Ralph Cloud" Subject: RV9-List: RiteAngle AoA --> RV9-List message posted by: "Ralph Cloud" I was wondering if anyone is planning to use the RiteAngle angle of attack indicator. It is a vane type of unit. We had a presentation/demonstration at our EAA meeting and, one of our chapter members has one installed on his Q200 and swears by it. Just for installation info. Ralph Wings Livermore, CA ________________________________ Message 6 _____________________________________ Time: 09:59:39 PM PST US From: Leland Subject: RV9-List: ELT mounting --> RV9-List message posted by: Leland The installation instructions for my ACK ELT say to mount it so that a 100 pound force applied to it in any direction will not cause a 0.1" movement. I initially mounted the unit to one of the side panels behind the pilot's seat. I added stiffeners and sheet metal doublers but the deflection exceeded the specification for a 20 pound force. I then copied the method used by two local area builders and mounted it to the floor of the baggage compartment with 0.062" plates top and bottom of the floor. The plates span two close lying ribs and are attached with six #8 screws and nutplates. The ELT is rock solid now. Note, Van's prepunched panel is cutout for the Ameri-King ELT display rather than for the ACK unit. Leland in Pleasanton Wiring the panel