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CanoMod . A Main Hobbies . Boca Bearings

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Gasser Model RC Helicopters > Cheap electronic ignition conversion
 
 
nivlek
Elite Veteran
Location: Norfolk England

I purchased a cheap CDI system to convert a glow engine to spark ignition , just to have a play . I tried it out today on a Petrol engine that I have in a fixed wing model and it works fine .
I thought that I would post a link just incase any of you would like to convert their gassers over to electronic ignition .
The CDI and sensor (also available from the same site) came to just £20.01 including delivery !

http://www.unitedhobbies.com/UNITED...?idProduct=6292

At the end of the day , it gets dark .
04-21-2008 06:48 PM
 
 
Brunobl
Senior Heliman
Location: Pomerode, Santa Catarina - Brazil

Seems interesting. The user comments on that site are all very positive.

However, it needs its own power supply? I love my gasser's independence from any exterior power sources (including the need to charge Rx batteries), so I'm not sure I'd use this just for the electronic conversion's sake.

Not all people want the same things, however, so I guess there is a good market for the device. Thanks for sharing.

-------------------
Best regards,
Bruno.
04-21-2008 08:57 PM
 
 
Professorwiz
Veteran
Location: Livonia, Michigan - USA

All the reviews are totally positive, that give me some pause.. That and the fact that one guy bought 3 without even checking first makes me think that the reviews are abit dodgy..

Just my 2c..
I'm a bit more cautious after buying a BME90 conversion..

Russ

Go that way really fast.. If something gets in your way.. TURN
04-24-2008 02:32 AM
HOMEPAGE  
 
 
FCM
Elite Veteran
Location: Back in Blighty!

I like the braided HT lead. The rest of the unit looks well made too. I didn't see what power supply it needs?

Thanks for posting

Paul.
04-24-2008 03:01 AM
 
 
Billme
Key Veteran
Location: MS

CDi will make your engine run smooth, but the magneto does a fine job, since we are running a constant speed...
Most of these units because of the input voltage will require a reg...that plus a battery is just a little much for me..

Why they don't go ahead and make the input voltage to the 7.4 range, then you can have a small lipo without a regulator, then, it will be worth it ...
3W engines in Germany does this, but for their engine only...Maybe they will sell it separately?
Bill
04-24-2008 05:47 AM
 
 
nivlek
Elite Veteran
Location: Norfolk England

Quote 
I didn't see what power supply it needs?

I tried mine out with a four cell nicad It is nicely made .

At the end of the day , it gets dark .
04-24-2008 07:02 AM
 
 
Billme
Key Veteran
Location: MS

4 cell will work fine, its just the batteries are heavy, when you compare the net gain with the magneto ...

By all means, if your not concern with weight, then great...

I have a engine setup that way now, just to keep it simple myself
Bill
04-24-2008 07:43 AM
 
 
ka6fty
Heliman
Location: Sacramento, Ca.

Quote 
Why they don't go ahead and make the input voltage to the 7.4 range, then you can have a small lipo without a regulator, then, it will be worth it ...
A couple silicon diode's in series would give you a 1.4V drop.
Something like an 1N5400 - good for 3 amps...

Quote 
the magneto does a fine job, since we are running a constant speed
I agree with Bill. Only benifit would be a smoother idle and easier starting. Probably won't do anything for power.

"Don't put your fingers where you won't put your face"
04-24-2008 04:24 PM
 
 
nivlek
Elite Veteran
Location: Norfolk England

The only reason that I purchased one really was to convert a glow engine to spark ignition . I can get a spark plug with the same thread as a glow plug , so that will make the conversion easier .

At the end of the day , it gets dark .
04-24-2008 04:53 PM
 
 
scotter
Senior Heliman
Location: Elkton, MD

weight

What about weight savings? Any to be found with this system?
04-24-2008 06:48 PM
 
 
nivlek
Elite Veteran
Location: Norfolk England

Quote 
What about weight savings? Any to be found with this system?

I doubt it but I can weigh the unit for you if you like .

At the end of the day , it gets dark .
04-24-2008 06:51 PM
 
 
nivlek
Elite Veteran
Location: Norfolk England

It weighs 103 grams (3 5/8 oz) . The only thing that might be an issue is that it has a plastic case , not ideal for shielding .

At the end of the day , it gets dark .
04-24-2008 07:20 PM
 
 
darwin
Heliman
Location: USA

It may well be painted on the inside with conductive metalic paint for EMI shielding.

Is it fully potted, or just in a hollow plastic case?
(e.g., if you tap it with your finger does it sound/feel hollow or firm and solid?)
04-24-2008 08:28 PM
 
 
nivlek
Elite Veteran
Location: Norfolk England

It feels quite solid , except for the base . It could be partially potted finishing before the base , but it doesn't seem heavy enough for that to be the case .

At the end of the day , it gets dark .
04-25-2008 03:21 PM
 
 
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Gasser Model RC Helicopters > Cheap electronic ignition conversion
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