ORIGINAL: DarZeelon
ORIGINAL: piper_chuck
ORIGINAL: DarZeelon
...This, instead of just supplying the right glow-plug for the application in the first place.
Is it possible for OS to provide a plug that will work right for every end user?
Yes!
If OS engineers decided that the A5 is the right glow-plug for the .61-.91FX, they must supply these engines with this plug; not with the A3, which is clearly the wrong glow-plug.
Please go back to the first post, for the link to OS' glow-plug page.
...Or, at least, they must sell (and have any and all their dealers do the same) you the A5 plug, when you buy a glow-plug for these engines. It is clear that using a hotter glow-plug will only make the engine run worse.
Even the so-called 'universal' #8 is a bit too hot for larger engines and a bit too cold for smaller ones.
You wouldn't just use a 'universal' spark-plug in your motor-car, would you?
If OS makes a range of glow-plugs, they should also make sure you use the right one for each engine.
Dar, you missed my point. If everyone used the same fuel and prop size and ran at the same altitude, temp, and humidity, it might be possible for the manufacturer an engineer to recommend a single glow plug. However, as you're well aware of, we don't all use the same fuel, or fly in the same conditions. This is why there is a range, and why no one plug will work for everyone.