Help! Massive Temp Fluctuation by Tilting Bator?

SpunkyChicken

Songster
10 Years
Feb 1, 2009
100
1
121
New Hampshire
I wanted to do the egg carton incubation method since my eggs were shipped, and I want to make sure the air sack develops intact/in the right spot. We have everything set up - just monitoring the temperatures before putting in the eggs. I'm using a still air LG so I was planning to tilt the whole incubator rather than just the egg cartons, so I tilted it to one side and played with the knob until it read a constant temp between 100.8 and 101 for a long period of time. I figured that was pretty dandy, so I tilted the bator to the other side to make sure the temps were still the same. Instead, the temperature dropped 10 degrees! I noticed that the little light on top of the bator stayed off as well, which is probably why the temp dropped so quickly.... I turned the knob up and the temp currently reads 98.8, so I'm not sure what would have happened if I didn't touch the knob at all.

Will I have to adjust the knob drastically every time I tilt the incubator to the other side? That doesn't sound right... the temperature in this room is always between 73 and 75, so I doubt we should have to do much adjusting throughout the incubation process. Should I just lie the eggs on their sides until day 18 and then put them in the cartons? At least then the temp should only fluctuate when we open the bator to turn them, and go back to normal soon after closing it...

Another thing - I currently have the sensor placed in the dead center of the bator, at about the height of the top of where the eggs would be. Does this sound okay? The internal sensor of the Accurite always displays a different temperature and is placed lying down in the front center - I notice it always reads a different temperature, even at room temperature (about a degree apart). Before I tilted the incubator one way, it was almost a 3 degree difference between the "indoor" sensor and the "outdoor" sensor (the outdoor one is the one I calibrated, which was 1.3 degrees lower than the medical thermometer). After tilting it the other way and the temperature dropped, the indoor and outdoor readings were almost the same, and they are now currently reading 4 degrees apart. This leads me to believe that there are temperature differences inside the incubator, extreme enough to hurt the eggs that aren't placed exactly in the middle... am I over-worrying? We've definitely hatched several batches of eggs in this bator in the past, but that was 10-13 years ago and I was too young to worry about keeping track of the hatch rates, haha.
 

SpunkyChicken

Songster
10 Years
Feb 1, 2009
100
1
121
New Hampshire
Thanks, that's what I figured it was, but didn't know the temp would change that drastically without going back up after. Looks like I'm gonna have to nix the egg cartons until day 18; the top rows of eggs would definitely be too close to the heating element if I were to tilt the cartons inside the bator. Unless I cut the cartons into single rows perhaps?
 

Akane

Crowing
11 Years
Jun 15, 2008
4,654
51
251
Still airs layer. With no fan to move the air the hot air sits above the cold air. The higher up you get in the bator the hotter the air. Also the closer to the center the hotter the air. In order to do tilting you have to account for that and measure the temp in many different places and average it. I've done it and am doing it right now but it's a pain and I've never tilted the actual bator. I'm sure tilting the bator instead of the cartons in it is causing some interesting changes in air flow as the hot and cold air try to sort themselves back out again.
 

SpunkyChicken

Songster
10 Years
Feb 1, 2009
100
1
121
New Hampshire
Yeah, sounds like I shouldn't try the tilting method until I get a forced-air incubator...and will probably just use an autoturner at that point, haha. I just hope the eggs sitting around the outside of the bator will be okay... I have 15 to fit in that LG!
 

shelleyd2008

the bird is the word
11 Years
Sep 14, 2008
23,381
96
351
Adair Co., KY
Use some baggies filled with water or some bottles of some sort, something to take up the extra 'space' left over from the lack of eggs.
Personally, I would set the eggs around the inside of the bator, rather than the outside edges. Put the baggies/bottles around the outside.
 

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