Weak spark on a dle 55???? - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-27-2019, 05:55 PM   #11
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Re: Weak spark on a dle 55????


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Air gap does play a factor in the ignition.. As the magnet passes under the sensor the ignition measures the time it spends under the sensor.. " the dwell " angle.. this is how the ignition knows to advance or retard the timing.. as for the hall effect " transistor " yes they can become weak aka " fuzzy " and not generate a strong enough signal to fire the ignition properly..

Watch the video .. good basic primer to understanding hall effect..

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Old 07-27-2019, 11:01 PM   #12
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Re: Weak spark on a dle 55????

.The dwell of the sensor over the magnet is only used to retard the timing when flipping . once the engine is running it uses RPM to advance the timing or the dwell or distance between the multiple square wave pulses from the hall sensor . but you were close .
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Old 07-28-2019, 06:15 AM   #13
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Re: Weak spark on a dle 55????

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.The dwell of the sensor over the magnet is only used to retard the timing when flipping . once the engine is running it uses RPM to advance the timing or the dwell or distance between the multiple square wave pulses from the hall sensor . but you were close .
Like I said the time the magnet spends going past the sensor.
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Old 07-28-2019, 09:38 AM   #14
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Re: Weak spark on a dle 55????

I only meant to highlight these are two separate functions that the module is programmed to do . the function you mention only covers flipping the engine . after it starts it no longer uses the time it's under the Magnet ,only the time between pulses . Think of it this way you can set the dwell on a point ignition as long or short as you like it wont change the RPM one bit and RPM is whats being used to adjust the timing when running this ignition .

Unlike point ignitions capacitor discharge ignitions do not use dwell for coil saturation , the capacitor is always being charged . so a increase or decrease in dwell does not change the capacity of the secondary portion of the ignition system to fire. If the module sees a square wave it will fire , seeing as the hall can only signal or not signal the ignition will either fire or not fire . even it it were possible to have a poor signal it would either be strong enough to fire or not . What you are talking about would be possible on a point ignition because poor dwell or dirty(fuzzy lol)contacts can reduce the saturation of the coil and weaken the spark ..
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Old 08-01-2019, 06:49 PM   #15
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Re: Weak spark on a dle 55????

Hello I had a problem with a DLE55 with weak spark it was the magnet was weak, ordered a new prop hub fixed. Also if you want to check out your ignition get the ignition kit from CH ignition, he has many videos on the subject on his web site. Good luck my man..
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Old 08-01-2019, 08:00 PM   #16
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I had a weak magnet on my 3W 42 engine. I put a rare earth magnet on it for a while "6 months" he he and it worked good after. I'm sure if you left it on there in between flights and when it sits in the hanger it would recharge with out interfering with this summer.
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Old 08-02-2019, 05:14 AM   #17
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Re: Weak spark on a dle 55????

Wonder how frank, the guy who started this thread made out?
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Old 08-02-2019, 10:05 AM   #18
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Re: Weak spark on a dle 55????

He's probably a bit “fuzzy”! Lol
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