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Eliminate ignition battery? - 1/14/2012 10:31 PM   
Scota4570


 

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From: Salinas, CA, USA
Status: offline 		I run single or dual 5-cell NIMH for my receivers. I use Futaba 2.4 RXs for my gassers. Can I use one of these:

http://www.hobbyking.com/hobbyking/store/__15212__HobbyKing_Micro_UBEC_3A_5v.html

or something simmilar, to do away with my ignition (RCEXL) battery?





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RE: Eliminate ignition battery? - 1/15/2012 2:44 AM   
av8tor1977



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Status: offline 		Well, if you look over in the "Gas Engines" forum, there is a huge "ballyhoo" about this, with proponents on both sides.

Having said that, I decided to try it. My latest plane, an ARF bash with a BME/Supertigre .90 on gas/ignition, is controlled by a Hitec Aurora 2.4 rig. I am running the ignition system and the radio both on one battery. No problems so far. (I am not using an isolator of any kind; just running both the receiver and ignition off one battery to save weight.)

Apprently from what I have read, the RCEXL ignition likes 4.8 volts but will live on 6 volts. No more than that however...

AV8TOR

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RE: Eliminate ignition battery? - 1/15/2012 2:51 AM  1 votes
av8tor1977



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Status: offline 		As a side note, I do some fairly nasty bench testing on any of the electronics I get from China. I have a 5 volt vibrator motor assembly that I got out of a toy. I mount the electronic item from China on some foam, but attached to a piece of wood with the vibrator motor mounted on it. I then do a "burn in" run for 30 minutes with the component running and being vibrated. If it survives that, I fly with it.... So far so good. It kind of deals with electronic "infant mortality rate", cold solder joints, loose/floppy components, etc. (At least I like to think so.....)

AV8TOR

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RE: Eliminate ignition battery? - 3/1/2012 3:31 AM   
nateprice215


 

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Status: offline 		I would do away with your entire ignition with this:

http://youtu.be/7GfKySURoeA

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RE: Eliminate ignition battery? - 3/1/2012 2:55 PM   
Tidnab


 

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Status: offline 		In running your weedeater on a glow plug,it eliminates the stock ignition,except for the flywheel.If this engine would be converted to an airplane engine,would it start as easy just flipping it, or would an electric starter be needed ? I have a Homelite 30cc I converted,but it is still using the original module.Would using a glow plug,be benificial to power and rpm's of the engine ? I also run highly modified Homelites in my gas r/c boats and if your method would increase the power and rpm's that would mean more speed. I run 32:1 mixture in my boat engines.Will glow plugs work with a higher oil content than the mixture you're using ?

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RE: Eliminate ignition battery? - 3/1/2012 4:10 PM   
av8tor1977



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Status: offline 		There is always this option: http://www.rcuniverse.com/forum/m_8009384/mpage_1/key_/tm.htm

It works on every engine I have tried it on from 15cc to 50cc, and you usually gain at least a couple hundred rpms.

AV8TOR

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RE: Eliminate ignition battery? - 3/2/2012 12:07 AM   
nateprice215


 

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Status: offline 		My gasoline glow plug conversion and the gas/glow conversion both eliminate the flywheel, coil, wire, and sparkplug.

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RE: Eliminate ignition battery? - 3/9/2012 5:03 PM   
Papa51


 

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Status: offline 		How could I determine which engines will work only on the standard gasoline/oil mix as shown in the video? Is it just trial and error or are there certain engines that are more receptive to this modification? FYI I have an old Quadra 50 engine that I would LOVE to convert just to save some weight. Trying to ween myself off of glow fuel so having to mix glow fuel with gasoline would defeat the whole purpose.

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RE: Eliminate ignition battery? - 3/9/2012 7:55 PM   
nateprice215


 

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Status: offline 		If you have M14x1.25 spark plug threads and tell me the distance between the piston and the gasket of the spark plug, then I could make one fit for you.  So far, I have made this work on Ryobi and echo.







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RE: Eliminate ignition battery? - 3/13/2012 9:43 PM   
Papa51


 

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Status: offline 		My sparkplug is angled at 45 deg. I guess the intention is to get the end of the glow plug as close as possible to the corresponding spark-gap location. The plug being angled will make it a little more difficult to measure exactly how high above the piston TDC the center/end of the spark plug is. If you just used the dimesions of the sparkplug from the end to the top surface of the head that the sparkplug seals against, you could just make it so that the end of the glow plug at full insertion coincides with the location where the end of the sparkplug would normally rest. On another note, has anyone maybe considered the possibility that using E15 fuel would give you a 15% ethanol blend in the fuel already? What is the possibility that some people that are having success with this system are increasing their chances of success without knowing it simply by using a gasoline/ethanol blend anyway? Can anyone out there maybe shed some light on this? How about you AV8TOR? On still another note, I'm not sure if eliminating the flywheel on a magneto engine would not affect the engine balance. Doesn't the flywheel also contribute some degree of counterbalance for the engine or is the flywheel in itself balanced so as not to have any net affect on the engine? If I let you know what kind of sparkplug my engine requires, would that give you the information you need to make an adapter for me?

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RE: Eliminate ignition battery? - 3/13/2012 11:41 PM   
av8tor1977



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Status: offline 		I tried E-85, which is 85% ethanol when I first started with the Gas/Glow experiments, and wasn't happy with the running characteristics and so the switched to the Gas/Glow mix as we know it know. Methanol is different than ethanol, and it is the methanol that creates a catalytic reaction with the glow plug and helps keep it warm.

Most of these engines do not use the flywheel as part of the overall engine balance. An exception is some Ryobis. (I have only run across a couple of Ryobis balanced using the flywheel to assist in balancing in numerous years.)

AV8TOR

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RE: Eliminate ignition battery? - 3/15/2012 6:07 PM   
Papa51


 

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Status: offline 		How long will the glow fuel/gasoline mix keep in a good airtight container?

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RE: Eliminate ignition battery? - 3/15/2012 6:11 PM   
av8tor1977



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Status: offline 		If kept airtight, and in a cool spot out of sunlight, I would say one month. It might last longer but why take the chance? I mix up three quarts at a time. One quart of 10% oil, 10% nitro glow fuel and two quarts of premium gasoline.

When it goes bad, you will probably know it because the smell distinctly changes (usually)....

AV8TOR

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RE: Eliminate ignition battery? - 3/15/2012 7:03 PM   
Papa51


 

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Status: offline 		Three quarts at a time was pretty much what I was thinking. The 10/10 glow fuel is easier to find in quarts than in gallons........and then you don't have to measure anything out.

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RE: Eliminate ignition battery? - 3/16/2012 8:11 PM   
Papa51


 

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Status: offline 		Once I remove the magneto/flywheel am I going to need some kind of hub or something to take up the space where the flywheel was. The stock prop hub bolts to the front of the magneto/flywheel.

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RE: Eliminate ignition battery? - 3/17/2012 4:30 AM   
av8tor1977



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Status: offline 		A lot of the time I just use a hole saw on the drill press to cut out the center of the flywheel. I then dress that round and square on the lathe, then put that on the taper and use a standard screw on prop hub adaptor. (Well, I make all my prop hub adaptors too, but you know what I mean....) Anyway, a lot of the time that is faster for me than setting up the lathe to cut a tapered prop hub, and if it is for an ignition engine, the mag center is keyed so I make a collar to go over that and know that my ignition timing will never "slip".

AV8TOR

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RE: Eliminate ignition battery? - 3/17/2012 5:56 PM   
Papa51


 

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Status: offline 		I'd like to keep the magneto/flywheel in tact just in case the engine doesn't work satisfactorily on gas/glow. Then I could always convert it back to magneto. I guess I'll have to get someone to make me a hub.

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RE: Eliminate ignition battery? - 3/18/2012 4:11 AM   
av8tor1977



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Status: offline 		You could just leave the flywheel on it, and use a a regular screw on prop hub. Then if it runs ok on Gas/Glow, which I am sure it will, then you can have a prop hub made that eliminates the flywheel, or use the flywheel center and a screw on prop hub as I mentioned....

AV8TOR

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RE: Eliminate ignition battery? - 3/19/2012 6:01 PM   
Papa51


 

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Status: offline 		Sounds like a plan. I'll let y'all know how it goes. FYI.......... another source for a glowplug adapter that I have not seen mentioned here yet is Wackerengines.com. 14mm threads, $20 w/&3 shipping.

Thanks

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