---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Wed 04/21/04: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:26 AM - model a ignition (Les Schubert) 2. 01:34 PM - Re: model a ignition (Carbarvo@aol.com) 3. 07:42 PM - Re: Horizontal stab question (At7000ft@aol.com) 4. 08:02 PM - Re: Horizontal stab question (Peter W Johnson) ________________________________ Message 1 _____________________________________ Time: 07:26:14 AM PST US From: Les Schubert Subject: Pietenpol-List: model a ignition Larry Here is my take on it. 1.The problem with trying to fire one plug with two sources is that the odds of ever getting both systems to fire at the EXACT same time is more or less impossible, especially for all four plugs. If they don't fire at the same time the high voltage will follow back down the none energized plug wire instead of firing the plug. 2. The other thing to remember is that most likely a misfire will be caused by a fouled plug which this will do nothing for. 3. I here there are twin plug heads available for model A's. 4. I don't understand your comment about the "former starter hole" being taken up by a oil filter. I was sure that the starter mounted to the bell housing adapter that bolted to the block which you certainly don't want or need on a airplane. Les Dear 'A' Ford Engine Gurus, On my ('31) Ford I am currently using a single magneto per The Plans. However, I would like to add a second ignition source (magneto or battery) and wire both systems to one set of plugs. I have the engine's (former) starter location taken up by an oil filter, so that type of conversion is out. I guess that I will be adding something in the original distributor hole or . . . . ? Ideas Please! I am looking for some sage advice about what would be some good equipment choices and maybe even sources for same. Are there any known problems with using two ignition systems with one set of plugs? Thanks, Larry Prange NX1929A ________________________________ Message 2 _____________________________________ Time: 01:34:21 PM PST US From: Carbarvo@aol.com Subject: Re: Pietenpol-List: model a ignition Would you consider springing for a dual ignition head? I believe that if you'll visit [www.secretsofspeed.com] you will find them....Carl Vought/Huntsville, AL ________________________________ Message 3 _____________________________________ Time: 07:42:45 PM PST US From: At7000ft@aol.com Subject: Re: Pietenpol-List: Horizontal stab question Interesting, of all the tail feather pictures I have seen on the net none of them have had wood strips glued between all the gussets. Has anyone else had to do this? What I am trying to confirm is if the 2 8" x 1" x 3/16" plywood pieces glued to the center of the horizontal stab go on both the bottom and the top. I'm not sure if I read your problem right? But you do put the plywood gussets on top, but if you use Poly Fiber like I did, you have to cut strips of wood to go around the stabilizer to fill in the gaps between plywood gussets, as Poly Fiber dacron heat shrink covering, needs a constant perimeter level piece of wood to glue to, so when you shrink it, it shrinks evenly. If you have a gap on the perimeter your dacron will sag in the gap without a surface to glue to and shrink distorted. I learned the hard way! Ray > Just to make sure before I start glueing, does the > 3/16" ply that goes on the > leading edge and center beam go on top and on the > bottom of the horizontal stabilizer? ________________________________ Message 4 _____________________________________ Time: 08:02:53 PM PST US From: "Peter W Johnson" Subject: RE: Pietenpol-List: Horizontal stab question I filled the spaces between the gussets with spruce and sanded to shape. Peter. http://www.cpc-world.com -----Original Message----- From: owner-pietenpol-list-server@matronics.com [mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of At7000ft@aol.com Subject: Re: Pietenpol-List: Horizontal stab question Interesting, of all the tail feather pictures I have seen on the net none of them have had wood strips glued between all the gussets. Has anyone else had to do this? What I am trying to confirm is if the 2 8" x 1" x 3/16" plywood pieces glued to the center of the horizontal stab go on both the bottom and the top. I'm not sure if I read your problem right? But you do put the plywood gussets on top, but if you use Poly Fiber like I did, you have to cut strips of wood to go around the stabilizer to fill in the gaps between plywood gussets, as Poly Fiber dacron heat shrink covering, needs a constant perimeter level piece of wood to glue to, so when you shrink it, it shrinks evenly. If you have a gap on the perimeter your dacron will sag in the gap without a surface to glue to and shrink distorted. I learned the hard way! Ray > Just to make sure before I start glueing, does the > 3/16" ply that goes on the > leading edge and center beam go on top and on the > bottom of the horizontal stabilizer?