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Old Oct 15, 2012, 02:14 PM
I HATE GLOW PLUGS!
SrTelemaster's Avatar
United States, NY, St Lawrence
Joined Feb 2012
1,226 Posts
Quote:
Originally Posted by Brutus1967 View Post
OK? a glow plug cannot break?

Anyway, that is not how reliability assessments are made.

That would be: parts present combined with their respective mean faillure rate.

Personally, I think glowplugs in general show a significantly higher faillure rate than the combined chain of battery, sensor, electronics and sparkplug.

Brgds, Bert
Not to mention glow drivers & their high Ma capacity batteries.
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Old Oct 15, 2012, 02:19 PM
I HATE GLOW PLUGS!
SrTelemaster's Avatar
United States, NY, St Lawrence
Joined Feb 2012
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Hi Adrian

Quote:
Originally Posted by mac2286 View Post
I can't believe you found this thread. that just shows you are one dedicated man. Adrian, thanks again.
Adrian has his "sources".
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Old Oct 15, 2012, 03:37 PM
The Prez....... again
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United States, IA, Rockwell
Joined Jul 2011
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How often does the ignition on your favorite auto fail? For all intents and purposes it is CDI. Yes there are some minor differences.......

Ken
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Old Oct 16, 2012, 12:44 PM
Whatever works well .
Gary Cee's Avatar
United States, MI, Marysville
Joined Apr 2010
2,049 Posts
Quote:
Originally Posted by Brutus1967 View Post
OK? a glow plug cannot break?

Anyway, that is not how reliability assessments are made.

That would be: parts present combined with their respective mean faillure rate.

Personally, I think glowplugs in general show a significantly higher faillure rate than the combined chain of battery, sensor, electronics and sparkplug.

Brgds, Bert
I understand . Actually I was just breaking it down a bit . Still , there is very little that breaks down with a basic glow system . (Abuse aside) Even if you add on board glow (An extreme practice, far from mandatory) In the unlikely event of an onboard glow failure , the engine usually just purrs along without notice . In 50 years of flying , I have used on board glow with one plane . That plane is a loaner / trainer Kadet Senior . The on board glow is a convenience/ saftey addition to eliminate the need for a glow plug driver for starting . The engine idles and runs perfectly without the glow addition .
In the air , the main link is a simple glow plug . Many ,if not most glow plug failures are discovered and fixed on the ground .

The typical CDI has a myriad of components that can fail , any one of them can stop the engine at that point . Spark plugs foul , just as glow plugs fail . Hall effect sensors can come loose/fail , heavy on board batteries can fail , shielded plug wires can fail , CDI boxes etc . Shielding inadequacies can cause radio interference as well .

Parts that are not there cannot break still holds true .

Glow may have some drawbacks but the reliability and simplicity factor is pretty high with glow systems . I have seen very ...VERY few problems with glow systems . That won't keep me using CDI ..just sayin !

I whole heartedly doubt the potential glow failures in the air exceed the rate for spark ignition systems .

Diesel anyone ?
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Last edited by Gary Cee; Oct 16, 2012 at 12:58 PM.
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Old Oct 16, 2012, 02:36 PM
Registered User
South Africa, WC, Cape Town
Joined Dec 2009
1,402 Posts
Spark ignition engines don't stop the fan turning nearly as much as glow ignition engines do.

just saying.....
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Old Oct 16, 2012, 02:47 PM
Dieselized User
gkamysz's Avatar
Chicagoland
Joined Feb 2000
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Quote:
Originally Posted by Gary Cee View Post
Diesel anyone ?
Yes. I like diesels.

Greg
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Old Oct 16, 2012, 03:04 PM
Complete RC Idiot Savant
The Netherlands
Joined Nov 2009
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Quote:
Originally Posted by Gary Cee View Post
Diesel anyone ?
Quote:
Originally Posted by gkamysz View Post
Yes. I like diesels.

Greg
I don't....

Too limited in their applications: Never seen a dieselized helicopter, boat or car, where as glow and petrol as well as "glow converted to spark" can be used in all of the above and then some.

Brgds, Bert
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Old Oct 16, 2012, 03:09 PM
Dieselized User
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Chicagoland
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I fly diesel four strokes on a regular basis.

Greg
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Old Oct 16, 2012, 03:37 PM
I HATE GLOW PLUGS!
SrTelemaster's Avatar
United States, NY, St Lawrence
Joined Feb 2012
1,226 Posts
Quote:
Originally Posted by gkamysz View Post
I fly diesel four strokes on a regular basis.

Greg
I've heard that the old 15+:1 compression Saito FA150s & FA80s would readily run on diesel.

I guess that the glow plug was replaced W/a compression screw?
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Old Oct 16, 2012, 03:39 PM
Dieselized User
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Chicagoland
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My FA-80 wouldn't run on diesel, but I didn't put much effort into it. I convert OS four strokes engine to diesel.

Greg
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Old Oct 16, 2012, 04:07 PM
registered user
Annapolis, MD
Joined Sep 2009
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Here is a video I found of a Davis Diesel converted helicopter. The description says that the engine is an OS .32.

Diesel Raptor30flight (3 min 5 sec)
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Old Oct 16, 2012, 05:23 PM
Complete RC Idiot Savant
The Netherlands
Joined Nov 2009
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I stand corrected!

(The moment I wrote it I thought: somewhere, probably somebody has tried it)

But... not really impressed by how that engine runs....

Nevertheless, it's a Diesel Helicopter.

Brgds, Bert
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Old Oct 17, 2012, 04:10 AM
Whatever works well .
Gary Cee's Avatar
United States, MI, Marysville
Joined Apr 2010
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Quote:
Originally Posted by TimBle View Post
Spark ignition engines don't stop the fan turning nearly as much as glow ignition engines do.

just saying.....
I guess everyone gets different results .
Flameouts have never been a problem here
Given a properly set engine , there is little to go wrong from a component failure level with a glow system .
Lighter planes generally fly better .

Diesels !
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Old Oct 17, 2012, 04:22 AM
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Joined Mar 2007
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I love my Enya .40 4C diesel.

Never quits, whilst ever it has fuel in the tank.

I wish they'd extend their range to include something about .70-sized.
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