RunRyder - Glow Plug, (Have I been using the wrong one?)

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Engines Plugs Mufflers Fuel > Glow Plug, (Have I been using the wrong one?)

Buzz1167
Senior Heliman
Location: Somewhere over the Rainbow

Ok, I'm sure you've all heard of the Enya A3 (hot plug) or the OS #8
(medium-hot), and most of you flyers out there probably use (or have used) something like this. I recently read on a website that for Hi Nitro fuels that you should use a Colder plug. I've heard this for nitro cars and
trucks before but never thought it applied for us heli pilots. In fact
mostly I though this becuase even Jason Krause (2nd in the XFC) uses an enya A3 (hot) or an A4 (medium) plug an he runs hi nitro fuel, and I just kinda figured that he was right, But i recently read the technical perspective showing that Colder plugs are better suited for Hi nitro (low methanol) fuels. Is this true?????? Am I running a plug that isn't getting all the power out of my engine??? Are you??

Thanks in advance,
Buzz1167
Jon N

07-25-2002 Over year old.

fitenfyr
rrProfessor
Location: Port Orchard, Washington

Do some experiments...

Buzz,
Pretty much everyone I have ever talked to uses those two plugs. I have been using OS 8's but have just picked up a few Enya 3's since I am having some flameouts and wanted to experiment a bit. I have used them in the past and they seem to work better for me.
When it comes to engines each one works differently and they will all vary based on climate and altitude.
I wonder what they determined as "high nitro" did they list a content?

Jason Stiffey
Fly Fast....Live Slow...

07-25-2002 Over year old.

HOMEPAGE

Buzz1167
Senior Heliman
Location: Somewhere over the Rainbow

Ok, actually it said that the Less methanol you have, the colder the plug you need, and they said less than 65% or so menthanol requires a VERY Cold plug to work best.
100% - 30% nitro - 20% oil = 50% meth.
Needless to say, the theory is based on less methanol you have = more glow plug needed, whitch doesn't make much sense to me, but whatever. Here is the website ---- Click here
When you get there you have to click on Technical, then on glow plug info.

07-25-2002 Over year old.

Doug
Elite Veteran
Location: Naples Florida....

This may be true in Ducted fans and Boats where the engine is run at "best power" but in the typical heli we run a long way from best power and need the hotter plug for good idle and transition.

First member of Member of Bearings Anonymous

07-25-2002 Over year old.

GMPheli
Veteran
Location: W. Bridgewater, MA USA

When compared to other applications, heli engines are run very rich. This is why you need a hot plug. I believe the reason that helis need to be run rich is because a heli engine has to work very hard, and it also does not have a real good cooling system. I thought the same as you when I got my first heli. I broke my Webra 32 heli engine in on a test stand, with a 10-6 prop and ran it blubbering rich. When I put it in the heli, it was too lean!

Alan Angus

07-25-2002 Over year old.

Buzz1167
Senior Heliman
Location: Somewhere over the Rainbow

Thats it, now im convinced that I need to get a Water cooled head and install AC in my copter (to cool the water of course).

So basically your saying that the cooling system isnt good enough on a helicopter to make a difference? So I need to buy a .12 and put a big fan on it to cool the 46? Any ideas on improving the cooling on a raptor? Does someone else make a better fan system?

Buzz1167
Jon N

07-25-2002 Over year old.

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Engines Plugs Mufflers Fuel > Glow Plug, (Have I been using the wrong one?)

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