I was up late last night and reading through some of the RCU when the Engine Temp thing came up again for the 50th time. Since there are no published specs on it all as far as glow goes, my opinon still stands of a guy pointing a temp gun at the area of an engine shows[sm=bananahead.gif]. It was something that W8ye said that got me thinking about it but i was tired and blew it off until this morning.I still like to think I know a bit about turbines. Not from RC but from the real world and I am now curious if we can associate between turbine theory and glow. Now I don't get serious very often so you guys need to take advantage of this and maybe log it.

Many full size turbines to include are own RC versions use EGT or Exhaust Gas Temp. Nothing difficult about this as it simply does as it says. It measures the temperature of the exhaust. No more difficult to understand here than sticking a thermometer inside the exhaust of your car. However the temp reading you get determines three areas, "fine, not so fine and something s wrong here."

Now lets change direction and go to the glows. You point a temp gun at the glow engine but are you pointing it in the right place? For the sake of argument, lets say there are specs for operating temps on a glow. Where you point the temp gun determines an accurate reading. W8ye tells me the glow plug is generally the hottest area. I honestly don't know but sounds good to me, so lets go with that.

It's safe to say that the temp decrease's the further it is away from the source, so the temp on a fin is going to be cooler than the temp on the plug or at the base of the fins. So with this, taking a temp from an engine will not give an accurate reading of whats going on inside-UNLESS the temps at certain locations onthe engine are based on the inside of it.

So with this, it seems the best location is to shoot is at the glow plug or thermocouple attach to it. Where would the exact location be to get the most accurate reading. Simply pointing a temp gauge at the head doesn't work with me. My twist on this whole thing is would the measurement of the exhaust on a glow be as an effective reading as the plug, more or less?

Phew! all that gave me a headache.