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Well Don I've been working on engine combustion now for almost 40 years off and on, so there is a lot I have learned and even more I'd like to try. The biggest thing I have found is that one ignition I made and trying I'm trying to upgrade with newer electronic devices combined the best features...

It's been awhile since I've posted here or even tried to keep up with what has been posted. But here is another thing that has been left out on this research but, it's stuff I have researched already myself and would like to share. One thing that happens in a combustion engine when the...

Here is something I found with RADAR equipment and ignitions, Don you and Ignator might know about this, VSWR (Standing Reflected Wave). It's been my experience with ignitions that this increases with the plug gap, wire resistance, and the air/fuel mixture. Basically anything that impedes the...

You know when I went to electronics engineering school they had the habit of making us go into so much detail it was nuts. When I got out into the field I started to forget everything that wasn't related to the stuff I wasn't working on. But it is somewhere buried in my brain, use it or lose it...

LOL, I just punched in the numbers and the Excel spreadsheet did the rest. Yah I guess I could have whittled it down some, I wasn't sure which way to go on that one. My bad. Ray

Wow, the subject of inductors and transformers from one misread PDF is not good. I don't know where you guys got your knowledge from or what kind of equipment you have both worked on. But you both missed and are missing some information. That paper "LECTURE 25 Basic Magnetic Material Information...

The best is the one I'm developing, LOL. But for right now the ones that come to mind are the RCEXL & the S/S ones. I say for right now because I would wait if you can for Don to finish his testing. The things that I would look for are the battery requirements, size, and easy of use with the...

I think if we're going to be on the topic of capacitors we should mention for the layman that there are different types of capacitors that use different materials for different applications. Not all capacitors store a charge, some like ceramics and there are others (Mica and PTFE) that are best...

One to make or one to buy? Ray

The problem with all this is that this is a forum for marching engines and when it comes to ignitions how much information is too much? I know that for myself I sometimes go too far and give out information that is well, irrelevant and not required for the end purpose. Then there is how much...

To be honest I can't remember. If I do I'll let you know.

Yah Peter it was a late night. Yes I blew that one. And yes you can step-up both voltage and current but, inversely. Yes a capacitor stores a charge but, current is not the major side of the charge. It's just like an inductor leans more toward current. Certain capacitors that are good at...

With R/C engines we use the braided ignition wire mostly to cut down on RF interference on the radio receiver. Some like me use standard RG-59 TV cable and smaller silicone plug caps. Just need to break out the grounding braid a bit, hide it, and make sure it's grounded. The RG-59 cable actually...

Short form: CDI Short Spark; Yes CDI's have a short spark and the main reason is they Don't use dwell time. They only have the time constants for the capacitor and the time constants of the primary coil. On top of this one needs to also include the ESR (internal resistance) of the capacitor and...

The new RCEXL is version 2 and there is also a #2 Hall-Effect mount. According to the instructions the RCEXL will only trigger off the south pole which, is normal. Firing both plugs at the same time is also normal since most R/C twin cylinder engines are opposed piston (boxer) design with both...

Working on it.

I totally agree.

-"why do CDI seem to produce shorter spark duration than LDI?" The whole idea behind a CDI is to produce a higher voltage spark without having to build a huge coil. The automotive CDI coils are about half the size of the LDI coils, in pre computer EMUs era. Capacitors are known more as a voltage...

Good questions. With the projects I've been involved with the minimum battery I've seen used the most is 4.8 volts (4xAA) and a current consumption of 0.5 amps for a single cylinder. Of course multiple that by the number of cylinders. On my basic Sparky ignition it is 4.5 volts and 0.4 amps but...

It seems that way. :) I tried editing SPICE model programs but, found it to be PITA. So long as I get a good starting point I'm happy. Ray