Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Oh. I believe those hyper power drag engines employ magneto’s. Also very popular in aero circles too.
Certainly I find this whole topic fascinating. But more than anything, the engineers that did the original research and design of all these machines, I'm in awe of. There's been some very clever people within these teams, trying to understand exactly what they did is intriguing.
I’ve just seen a squirrel…..Seriously though. I transistorised switch has got to be a better solution to achieve a superior Ldi/dt HT performance and reducing stored energy across the points Cdv/dt?I’m betting that if CDI or and EI was available to Mr Honda back in the 70s he would have used it in preference to a mechanical system.Just wondering….
Quote from: K2-K6 on January 26, 2022, 02:50:58 PMCertainly I find this whole topic fascinating. But more than anything, the engineers that did the original research and design of all these machines, I'm in awe of. There's been some very clever people within these teams, trying to understand exactly what they did is intriguing.Oh sh*t Cathy just came in early and I have it boiling away in a pan on the kitchen hob
I found this which answers my question on the Boyer Bransden system. It only has a single transistor because it fires all 4 coils at the same time. .. so I guess consumes double the current of the standard ignitionhttp://www.sohc.co.uk/index.php?topic=9062.0Also found this where a Norton guy de-potted a BB unit. :-http://atlanticgreen.com/boyerexposed.htmThe Honda 4-Cyl Mk3 one which one I am de-potting has blocking diodes on each coil though and a string of 5 series connected Zener diodes, which protect the transistor. Still plotting out the Honda-4 version circuit. All of the capacitors are tantalum type.... which is good news.