Re: I 4-2-4'd a Cox

John Goddard Wed Mar 27, 2013 3:42 pm

Glow engines skip firing strokes Travis.
When they're rich they do it more hence
4 stroke rather than 2. This is referred to
In OS manuals in the running in section iirc.
This skipping is best seen when using a tachometer.
When the revs bounce around it's because
It's missing it's firing and in effect stuttering
Not as is commonly misthought dodgy
Tacho's.
Very Happy

**RknRusty** Wed Mar 27, 2013 4:50 pm

cribbs74 wrote:As I understand it a 4-2-4 means it runs rich during level flight (4) leans out when the nose of the plane goes up (2) goes back to normal in level flight (4) i never understood why it's often referred to as 2-4-2. It's basically the sound the engine makes. Rich lean rich etc.

Ron

Just another cool sounding name we invented, like calling a methanol powered engine a "nitro" engine. Kevbo has about the best explanation for what's happening so far.

SuperDave Wed Mar 27, 2013 5:00 pm

As a "snooty" paralell, fly fishermen call a spit-shot a "depth accelerator", a bobber a "strike indicator" and a life jacket a "personal floation device" (or PFD).

I know because I am one. Laughing

SD

**Cribbs74** Wed Mar 27, 2013 6:12 pm

RknRusty wrote:
cribbs74 wrote:As I understand it a 4-2-4 means it runs rich during level flight (4) leans out when the nose of the plane goes up (2) goes back to normal in level flight (4) i never understood why it's often referred to as 2-4-2. It's basically the sound the engine makes. Rich lean rich etc.

Ron
Just another cool sounding name we invented, like calling a methanol powered engine a "nitro" engine. Kevbo has about the best explanation for what's happening so far.

I was referring to saying 2-4-2 as opposed to 4-2-4 unless folks use to VOG from launch.

Usually you go from level flight to a chosen stunt. So I think 4-2-4 is more accurate as to what is actually taking place. Tomato Tomaaaahto I suppose.

Ron

nitroairplane Wed Mar 27, 2013 7:31 pm

Tomah'o

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