Hi.
I have a Evolution 26gt2.
when i first bought it, the engine worked great, i am using a Motul 2T Racing Fully syntetic oil (1:33)
after a gallon of fuel through it, i tach it at 9000RPM on a 16X8 Master Airscrew (Great performance).
from some unknown reason, the Ignition module broke down and i had to replace it.
didnt changed anything... exept for the ignition module...
now the engine spins the same prop (16X8 MA) at ONLY 8200RPM.
i tried re-tune it, but this is as good as it gets...
the new module looks exactly as the first one.
i am running a 4cell 1000mAh NiCad battery, didnt changed it (the ignition module specificly says 4.8V).

two of my friends have the same engine, theire engines have 2 magnets on the prop backplate...
My engine have only one magnet.
could it be that the new ignition requiers both magnets in order to time the engine right?

this is a bit frustrating, the engine suppose to be a "Top of the line" engine, but it has a lot of problems...

is there anything i am missing?

I know that one of the leading threads now is related to these engines... personally, i really liked this engine when it worked good,
but it just isnt worth spending so much money for a 8200rpm engine (i could have buy one of the cheap chinese engines for more than half the price and same performance)

Thank you.
Raviv.

You say, you only have one magnet. What is the code (name of your ignition module) Is it a black potted box, a film roll type, or a tin box ignition.
the old type vlach that used one single changed to two magnets, but this will not operate with the single magnet.
Engine power should not be ignition type dependant. Ask for a new ignition. The one they sent you clearly is not OK. Don't blame the engine if the fault is somewhere else.

Hi Pe, thank you for your replay.
the new ignition looks exactly like the one int the following link:
[link]http://www.horizonhobby.com/Products/Default.aspx?ProdID=EVO30943312[/link]
i really think i will have a hard time replacing this module, how can i explain the supplier that the ignition doesnt work right?

The instructions with the module should tell you how to set up the magnets
I would hope anyway

actually, you cant adjust the timing in the Evolution engines.
the sensor is bolted to the crankcase and the magnets are fixed ate the propeler thrust washer.

i will try replacing (again) the module at the LHS i bought it from... hope it will help this time.

My eyesight is too bad for such a midget picture with no visible clue of the real item.
If you have a single magnet engine. are you sure it's a bluehead evolution? If I am well informed, the evolution MVVS's all have the twin magnet ignition. Check the engine numbers on the left and right mounting flanges, like D-58 (l-r), and communicate that with horizon, or order a twin magnet prop hub to go with the ignition you have now. The key location has never changed, so it should be the right thing to do when upgrading.
If then it still does not work OK, they sent you a faulty ignition.

I had one of these engines and the one comment I caught from your description is that you were using a 4.8v battery. Mine required a minimum of 6 volts to a maximum of 8.4 volts. It had the module you can see in manual. Also 2 magnets not one. Something does not sound right, are your sure it is a GT2? notice where the plug screws into the head, is there a round shield around the bottom? if there is it is the older version using the 4.8 batt.

Hi pe-
I am sure its a blueheaded evolution, the head have a "26GT" written on it.
you said that the new ignition, the one that needs two magnets to work, wont work with a single magnet... my Ignition module works, but not as good as it should.
Horizon wont communicate with an israeli costumer, they will direct me to theire distributer...
I really dont know what to do... first - a good module broke down and i had to wait so long in order to replace it.
now - when i got the new ignition, it seems to be working wrong...
if i will decide to replace it, i will probably take forever until i get the new one.

JPal -
The ignition clearly says "4.8V", its written in big blue letters on it (and small black letters on the engine's manual [8D])
The plug does have a round shield around the bottom,
the plug cap (at the ignition side) is a chrome plated round cap that is held to place (to the plug's bottom shield) using a small allen bolt.

thanks.

Ravivos

You do not have a GT2 buy your description , early when the GT was out on the market Horizon came out with a bulletin stating they had problems with that ignition on 4.8 v and that it needed at least a 6 volt and you could use a 7.4 lipo un-regulated with no problem. Not long after came the GT2 with a newer ignition

How long did this engine run good on 4.8 before it went bad????

you might try a 7.4 lipo on the new one.

I will call Horizon on Monday for you and post the results here, check back.

Dave

Hi Dave-
The engine worked great for about one gallon of fuel through it.
then the ignition module broke down and i had to replace it.

with the previous ignition module, the engine peaked at 9000rpm on a MA 16X8, great performance.
the only thing i changed was the ignition module, with the new one - the engine peaks at 8200rpm on the same prop.

it seems that the ignition, although it clearly says 4.8V, needs a bit more...
i really dont want to fry my module so i have some hesitations about connecting it to a highr voltage source...

I will wait for your replay regurding horizon's answer.

10x dave ...

Ravivos

Go to the Horizon website and lookup the EVO26GT2, then find the current manual for it and go to the part that speaks about the ignition. You will see that the current module for the GT2 looks entirely different from the one that you provided the link to. This is the current module that is being used today it also comes with a strob light. Another thing is that the current ignition spark plug cap presses on the plug and is not held on with an allen screw. Again by your description I believe that you do not have a GT2 but a GT

Hi,

I know 3 modification.

1. one magnet - ignition is in mettal silver box for 4 or 5 NiCd
2. two magnets - ignition is in metal silver box for 4 or 5 NiCd
3. two magnets - ifnition in black plastic box , Lipol or 6 NiCd

For each of them you have to have correct catch for propeller with correct position for magnets and correct number magnets

I have asked MVVS to look at your question, Maybe they can tell exactly what's going on. I hope I can get an answer.
Your Horizon dealer should not let you down though [:@]

in order to clarify things, i attatched a picture of my engine.
the picture clearly shows the ignition module, the plug connection and the single magnet.
tested the battary today, even at 1A load, the voltage remains 5.2V

i dont think it really matters if the engine is a GT or a GT2, as lon as it work well and strong.
i only ask to have the rpm readings that i had before the ignition module was changed.

and the pic...

pe - thank you for your help, i hope MVVS could advise me and help me solve this problem

You have the early version of the 26GT. They are NOTORIOUS for faulty ignitions. My reccomendation is that you send the entire engine and module to horizon or designated service center for a replacement of the engine with the newer version. It's your only hope.

I can definitely say that your engine is not a GT2. The 26GT2 comes with a MSR (ICU-L) ignition module. The MSR ignition module is designed to run with a MINIMUM of 6.5V. It will safely work between 6.5V to 8.4V and is self regulated for LiPol and LiIon batteries. They have a warning indication stating that this version DOES NOT have a battery test mode, therefore there is no need to place the engine at BDC before powering up the ignition since there is no pre-ignition spark to clear the cylinder. This new module also comes with an LED indicator to warn you when the ignition is in sleep mode (Auto-off), and when the battery is too low (<6 V).

The 26GT2 and the 35GT2 don't have the choke servo option, and the plug cap does not have the retaining set screw.

One thing is for sure, if you have only one magnet on your backplate you need an ignition module with a single pick-up designed for the generation 1 engine. Damroadhog is correct in that Horizon issued a bulleting stating that it was O.K. to use 6V, that is a 5 cell NiCd or NiMh pack NO LiPol/LiIon packs.

I think your LHS sold a bill of goods, and they should re-order the correct part for your engine.

You should be taken care of by warranty.
If you want to keep the engine and make it run right. Then we have a setup that will work fine and is adjustable. BUT you gotta buy it
CH Electronics

Ravivos


Spoke with Danny at Horizon today, he said "do not put more than 4.8 into the older style ignition" as you have.

also asked if he would do some thing like an exchange/ upgrade and he said no you would have to buy one.

If I were you , I would talk to your LHS that sold you this one and return and reorder the new one and order the prop shaft washer to match

Part# prop drive washer ( EVO3094I1101 )
Part# ignition ( EVO3314LB )

What sucks about this is when you ad up the money you will have more into this engine than a new DA 50.

I have $520.00 into my GT2, but I love every flight


Good luck

Dave

Hi Dave.
Thank you for your help.
I would try replacing my ignition with a GT2 module and order (buy) a new prop washer, i just hope my LHS wont give me any problems...
this means that the engine (and the plane) are grounded until i get the parts, which probably take a month or two. [sm=sad_smile.gif]
I really like this engine - easy to start, works great, reliable...
It sure is annoying to spend so much money (engine + bisson muffler + accesories) on an engine and have it grounded for a faulty parts... [sm=angry_smile.gif]

the engine is mounted on a CMP zero, absolutly great combo
[img][/img]


never mind... ill just fly my Israeli TF spitfire [sm=shades_smile.gif]
[img][/img]


Edit: it seems that i cant attach the pictures inside the text itself...

I received the response from MVVS:
The ignition you have is a horizon special, to be used with 4 cells only. I think horizon sent you the right ignition type, but that it is faulty, so I would advise you should send it back for replacement.

quote:
Dear Mr. Reivers,
the engine is equiped with one magnets, which is modification for Horizon only. The ignition must be replaced for the same type. The box looks similar, but the ignition inside has another construktion. The customer should buy the Horizon ignition, not Vlach.
There should be no more as 4,8 V, the igniton can be so damaged.
Best regards:
Josef Svajda

unquote

To avoid confusion:
I would like to ask the posters, commenting not in accordance with this MVVS statement, to edit their posts accordingly.

Nice planes!
You can post images inside the text like this if you insert the image URL between the image quotes. The image must be available on a (your?) public domain.

Pe, again, thank you.
i didnt connected anything but a 4.8v batt (4 cell NiCad).
i guess i will replace the ignition module again, hope this time it will be o.k.
that is funny, i have this engine for over three month and i had only four days of flying on it...
now i will have to wait for the new ignition, only god knows how long will that take.

well, what can you do, right ? patience is the name of the game...

p.s
the engine was mounted on a biplane that i designed and built, a full two days of flying [sm=48_48.gif]
then the first ignition broke, so it waited for a new one on my zero.

The very minimized RC engine ignitions are more delicate than the motorcycle CDI units. I think we must accept that fact.

Nice fat smoke from that bipe! how did you set up the system?

Ravivos,

That's a very nice Spitfire, and I like the IDF markings. Could you send more info on this model for all of us Spitfire fanatics, (i.e. Kit Manufacturer, powerplant, scale documentation, photos, etc.). I have been looking for a Spitfire for my next warbird scale project and your Spit looks like a very interesting subject.

Since this is off the subject you can send me private e-mail. I will appreciate any information you may provide. Good luck resolving the problem with your Evolution engine. You will not be disapointed with this engine, which I feel is one of the finest gas engines in the market.