---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Sun 04/28/13: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:46 PM - Canopy Cutting Made Easy! (Matt Dralle) 2. 10:22 PM - LOP Article (DEAN PSIROPOULOS) ________________________________ Message 1 _____________________________________ Time: 08:46:39 PM PST US From: Matt Dralle Subject: RV-List: Canopy Cutting Made Easy! The first step with any Van's canopy installation is cutting the plexiglass bubble out of the molding frame. For me, this went smoothly mostly thanks to an awesome tool called a "Roto-Zip" that is available from a local Lowes hardware store. I have a right-angle cut-off wheel attachment for it. I can't remember if this came with it or if I bought it separately as an accessory. In either case, it is a must have for this Plexi cutting. I got some 3.5" "metal cutting wheels" for it and I have to say it is the cat's meow when it comes to cutting the canopies out. The tool has plenty of power and doesn't bog down, yet it is very controllable and accurate cutting is pretty easy. Don't get me wrong, this is definitely a manly tool and it requires a fair amount of respect. But it has just the right weight and fits nicely in your hand. The right-angle attachment can be unlatched and spun in any direction in relation to the handle and cord, which is really nice. Highly recommend! - Matt Dralle RV-8 #82880 N998RV "Ruby Vixen" http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... RV-6 #20916 N360EM "The Flyer" http://www.mattsrv6.com - Matt's RV-6 Revitalization Log Status: 150+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode ________________________________ Message 2 _____________________________________ Time: 10:22:45 PM PST US From: "DEAN PSIROPOULOS" Subject: RV-List: LOP Article What prop do you have on the engine Jeff? I have an 0-360 with AFP conversion and I was using a wood prop for first flights. The thing had trouble with off idle acceleration and idling when hot. After 5 months of tinkering I finally discovered it was the flow divider. Don fixed it for free and things worked well for a few months. The airplane ran great, idled great and then seemed to revert to its prior condition but, after rechecking, it wasn't the flow divider and I never did figure out what exactly it was. When I was at 35 hours I installed a Sensenich FP metal prop which is at least 25 pounds heavier with a lot more inertia than the wood prop. The engine didn't have any more problems with quitting after landing because the inertia of the metal prop kept the engine turning through the roughness that would normally cause the engine to quit with the lighter wood prop installed. I finally messed with the idle mixture on the servo enough that the engine would idle smooth without the rough running cycles but that seemed to be a little too lean for off idle acceleration. When I would push the throttle in during a recovery from a power off stall or during touch and gos, the engine would sputter and run rough for the first 1/4 throttle and then smooth out and run well. It never quit under these conditions but it did bother me so I decided to richen the idle mixture a bit to stop that from happening. When I did that, the old rough running idle cycles reared their ugly head again but, at least no more sputtering off idle when hot. These rough running idle cycles occur after the engine has warmed up. When I start the engine (cold) it idles solidly at Don's suggested RPM (750) until CHTs get over 150 and the under cowl temps get warm. Then, suddenly it goes into this mode where the prop will spin several blades at 750 RPM and then the RPM will drop to apppx 600 for a few blades and then back to 750 RPM and, the cycle repeats itself. I think these RPM drops are caused by the engine loading up after it is warmed up but I can't be sure. When I first discovered the flow divider was sticking, it was acting that way but when Don repaired it, it was rock solid (after a mixture adjustment) at 750 RPM for a couple months, even with low inertia wood prop in the middle of a hot Florida summer. Then it reverted to its old self and caused some nuisance engine quitting after landing and taxiing. I checked the flow divider again but that was not the problem. When I've got the cowl off I always check the intake tube bolts and hose clamps to make sure they aren't loose and letting the idle go lean (but if my hypothesis is that the engine is loading up with excess fuel then an intake leak is not likely to be the problem so go figure). Bottom line is that if I leave the mixture full rich while idling and taxiing it is not nearly as big an issue with the metal prop due to inertia. But when I hear the engine start into the rough idle, that's my clue to lean the mixture and things smooth right out. I've been going to fly up to Don's and have him look at it and try adjusting it but haven't had the time. Leaning at idle works well and I would rather have to do that than have the engine sputtering during a stall recovery or go around. Just my observations after flying with the setup for four years. Regards Dean Psiropoulos RV-6A N197DM Tarpon Sprgs, FL (25 Meters MSL) ________________________________ Original Message _____________________________________ From: "Jef Vervoort" Subject: RE: RV-List: LOP Article - FLYING magazine RV9A with XIO-320 and Airflow Performance, needs leaning on the ground, near sea level. Jef Vervoort, Belgium. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv-list Browse Digests http://www.matronics.com/digest/rv-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.