RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

LOL!!!
I almost spit my drink all over my keyboard.

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Goobers!! Lol!

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

No reply...but here is the post about thetiming of Rcexl ignitions.<hr />Here's the deal with the timing, if you have one of the modules with #4 on it (stock DLE20) the timing is best at ~35*, if you have a standard Rcexl ignition with no numbers on it (says Rcexl on the module, not DLE) set it at 28*-30*. The module for the DLE20 has changed but even the original was set at 35*, personaly I prefer the standard Rcexl ignition at 28*. Either one will make the engine run very well but the #4 module will let the engine idle stupid slow, much slower than necesary.
<hr />There ya go..............

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Thanx jody and Capt., can I use my DLE55 ignition with the sensor set at 28* before TDC ? This is just to check if the engine is OK otherwise ?

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Yes, the DLE55 ignition is the standard Rcexl igniton, time it at 28* BTDC.

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Thanx Jody that was quick.... :-)

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

JediJody,

The DLE website says that the CDI can b run off a 6.6V LiFe Battery pack with a regulator, but the manual only refers to 6.0V operating voltage.
 I assume the website is upto date but will my DLE 4# CDI unit handle the 6.6V LiFe battery pack?

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

No. Put a UBEC or diode between the pack and the ignition so as not to exceed 6.0 volts.

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

What value would be correct for the diode ?

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Go to the top of this page and click on "Search This Thread",
then enter diode

You'll easily find numerous postings on this.

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

THAT web site is by Hobbico/Tower Hobbies, and NOT the official DLEngines web site.
It states "LiPo requires a regulator", not LiFe.

Now go back to this thread's first msg, and my recap of info here.
Click on the link "Ignition draw + Voltage issues......"

Then see my reply to dwreel

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

I'm using a 1N4007

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Please pardon the copy and paste but I'm tired of typing it all out, this question is asked almost every other page. With a little effort searching for answers one can almost always learn something else, maybe even the next thing they're going ask.

The DLE factory manual doesn't state any battery or voltage, the Hobbico manual says a 4.8 or 6.0 volt battery, the Rcexl instructions say 4.8-6.0 volts, it even states to use a diode or regulator if using 2 cell LiFe or A123 packs to drop voltage to below 6 volts. The very latest from Rcexl says that 7.0 volts is the maximum their ignition can handle but a single cylinder ignition is then drawing a full 1 amp from the battery when it can easily do its job on less than 1/2 that current. That means the excess is dissipated within the ignition as heat, not good for electronic devices.

That said, I work on these engines everyday, the failure rate for the ignitions run on straight 2 cell Life batteries is more than 5 times that of those run at below 6.000 volts. Those that survive the warranty period still die a very premature death and cost about $80 to replace. Personally I don't care if you want to use a car battery for your ignition and I have no problem replacing them under warranty if they fail, they give me new ones free, no questions asked. BUT, Rcexl, Hobbico, DLE, and certainly not myself will replace your airframe or replace your flying time or relieve any of the hassle having a bad ignition day will cause.

I've recommended countless times what's the safest, most reliable, provides the longest battery life, and the longest duty cycle for your ignition. Exceeding 6.000 volts only has draw backs, zero advantages, no performance advantages whatsoever.

Again, the diode is a 1N4007, 3 cents each, http://www.alliedelec.com/search/pro...px?SKU=2660007

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

The diode required to drop the voltage from a 6.6V LiFe is 1N4001 - it drops the V by 0.9V and so the output becomes 5.7V ideal for the CDI.
What I have done is to solder 2 male futaba connectors to a LiFe 6.6V. 1 goes directly to the Rx thru a switch and the other has a 1N4001 in series and goes to the CDI thru another switch.
hope this helps....

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Rcexl recommends the 1N4007 diode, not the 1N4001.

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

why? they have the same characteristics only the operating/ reverse voltages are different. for our low voltage use even 1N4001 is enough. Please correct me if I am wrong.

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

You will need to ask Rcexl that one, but their instructions are clear which one they recommend.

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Here is a related question and I don't mean to Pi$$ anyone off here but I am going to run a 5cell NiCd pack and we all know that at full charge they go over the 6V range so do I also need to protect the circuit with a regulator or a diode to prevent over voltage until it actually comes down to normal operating voltage?

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Yes

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Come on people, READ. I just posted this a couple of hours ago.This is notdifficult to understand.

The DLE factory manual doesn't state any battery or voltage, the Hobbico manual says a 4.8 or 6.0 volt battery, the Rcexl instructions say 4.8-6.0 volts, it even states to use a diode or regulator if using 2 cell LiFe or A123 packs to drop voltage to below 6 volts. The very latest from Rcexl says that 7.0 volts is the maximum their ignition can handle but a single cylinder ignition is then drawing a full 1 amp from the battery when it can easily do its job on less than 1/2 that current. That means the excess is dissipated within the ignition as heat, not good for electronic devices.

That said, I work on these engines everyday, the failure rate for the ignitions run on straight 2 cell Life batteries is more than 5 times that of those run at below 6.000 volts. Those that survive the warranty period still die a very premature death and cost about $80 to replace. Personally I don't care if you want to use a car battery for your ignition and I have no problem replacing them under warranty if they fail, they give me new ones free, no questions asked. BUT, Rcexl, Hobbico, DLE, and certainly not myself will replace your airframe or replace your flying time or relieve any of the hassle having a bad ignition day will cause.

I've recommended countless times what's the safest, most reliable, provides the longest battery life, and the longest duty cycle for your ignition. Exceeding 6.000 volts only has draw backs, zero advantages, no performance advantages whatsoever.

Again, the diode is a 1N4007, 3 cents each, <u><font color="#00265e">http://www.alliedelec.com/search/productdetail.aspx?SKU=2660007</font></u>

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Reading is fundamental,
comprehension is an acquired skill.http://images.rcuniverse.com/forum/t...80/Ec87708.gif

A basic 4-cell NiMh gets it done!

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

And a 5 cell needs a diode to get it done....

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

so a 12v car battery would work??http://www.rcuniverse.com/forum/js/f...bananahead.gif

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

Why not use 2 of them and hook them together and use a bunch of diodes to bring it down.

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
 

[/quote]
LOL, looks like a ruff day at the office Jody:)