Original Posted By: "Owen Davies"
Hi Listers,What is the general concensus of prop diameter, pitch and bladewidth/depth of a 110hp Corvair powered Piet?CheersPeter.________________________________________________________________________________
Pietenpol-List: Propellor Sizes
Re: Pietenpol-List: welding
Original Posted By: Wayne Meier
Among other comments, Jack Phillips wrote:> I bought his video, bought some flux (not from him) and tried my hand at> welding some 5052. It is nowhere near as easy as he makes it look.Unlike> steel which begins to glow first dull red then bright red then yellow then> white then begins to glisten and look "wet" before it melts, aluminum just> sits there sucking up heat from your torch until it nears its meltingpoint> and then "presto!" it's GONE. There is no color change or any visual cue> that it is about to melt.My aluminum welding is limited to a little practice in aviation-orientedwelding classes, so take this for what it's worth:Teachers claim that you can recognize when the puddle forms by aslightly "wet" appearence, but I've never been able to see it myself.Instead, I've managed to do some okay welds by just poking thesurface with the end of the welding rod, being sure not to leave therod in long enough to melt the end off. When it penetrates thesurface, start moving the torch and rod to lay down the bead.You'll have to move a good deal faster than with steel to avoidhaving the puddle fall through, but you can get the timing downwith a little practice.For something like a fuel tank, design can help. If you flange theend panels outward, so that the joint has two layers of metalfacing the torch, you can melt them down to form a bead withless risk of disaster.Kent White offers videos about all sorts of metalworking.I believe they include some on welding aluminum. I have notseen them, but his videos have a good reputation--amateurishproduction values, but lots of info.Now if only I could get far enough along in a project tohave some use for them myself.Good luck.Owen Davies________________________________________________________________________________Date: Thu, 14 Nov 2002 09:05:33 -0600
Among other comments, Jack Phillips wrote:> I bought his video, bought some flux (not from him) and tried my hand at> welding some 5052. It is nowhere near as easy as he makes it look.Unlike> steel which begins to glow first dull red then bright red then yellow then> white then begins to glisten and look "wet" before it melts, aluminum just> sits there sucking up heat from your torch until it nears its meltingpoint> and then "presto!" it's GONE. There is no color change or any visual cue> that it is about to melt.My aluminum welding is limited to a little practice in aviation-orientedwelding classes, so take this for what it's worth:Teachers claim that you can recognize when the puddle forms by aslightly "wet" appearence, but I've never been able to see it myself.Instead, I've managed to do some okay welds by just poking thesurface with the end of the welding rod, being sure not to leave therod in long enough to melt the end off. When it penetrates thesurface, start moving the torch and rod to lay down the bead.You'll have to move a good deal faster than with steel to avoidhaving the puddle fall through, but you can get the timing downwith a little practice.For something like a fuel tank, design can help. If you flange theend panels outward, so that the joint has two layers of metalfacing the torch, you can melt them down to form a bead withless risk of disaster.Kent White offers videos about all sorts of metalworking.I believe they include some on welding aluminum. I have notseen them, but his videos have a good reputation--amateurishproduction values, but lots of info.Now if only I could get far enough along in a project tohave some use for them myself.Good luck.Owen Davies________________________________________________________________________________Date: Thu, 14 Nov 2002 09:05:33 -0600
RE: Pietenpol-List: Propellor Sizes
Original Posted By: Walter Allen
Peter,RPM governs diameter, and max cruise governs pitch.I'm assuming 2800 RPM and 80 MPH cruise.Using those numbers it comes out to 68X28 or 66X29.It will be a while before I start carving, so I haven't got to the point offiguring the width/depth part yet.SkipWhat is the general concensus of prop diameter, pitch and bladewidth/depth of a 110hp Corvair powered Piet?CheersPeter.________________________________________________________________________________Date: Thu, 14 Nov 2002 12:28:35 -0800 (PST)
Peter,RPM governs diameter, and max cruise governs pitch.I'm assuming 2800 RPM and 80 MPH cruise.Using those numbers it comes out to 68X28 or 66X29.It will be a while before I start carving, so I haven't got to the point offiguring the width/depth part yet.SkipWhat is the general concensus of prop diameter, pitch and bladewidth/depth of a 110hp Corvair powered Piet?CheersPeter.________________________________________________________________________________Date: Thu, 14 Nov 2002 12:28:35 -0800 (PST)
Re: Pietenpol-List: Propellor Sizes
Original Posted By: "D.Dale Johnson"
Subject: Re: Pietenpol-List: Propellor Sizes
Subject: Re: Pietenpol-List: Propellor Sizes