An internal-combustion engine needs four things to run. They need fuel, mixed with air, in a ratio of 14.7 to one. An ignition-spark lights the fuel and air mixture, creating combustion. Compression of the fuel and air mixture makes it explosive. The final necessity is proper timing, of the components.
1 The length of time it takes for eggs to hatch after incubation begins depends on the species and temperatures. 2  For bluebirds, it USUALLY takes about 12-14 days from the date the last egg was laid.3  Different species have different incubation periods, which can vary within a species due to temperature inside the nestbox. Depending on when incubation begins (on the last, or next to last egg), eggs in the same nest can hatch a day or several days apart. 2  It also takes a while for the bird to break through the shell. 3  It could be a new egg from a subsequent nesting if you didn't clean the box out immediately after the last fledging.
show more my eggs are due to hatch in 4 days. do i leave them in incubator after they hatch or do i tensfer them to a brooder straight away. This is my 2nd attempt at hatching duck eggs as i had no joy on 1st try as they died on day 24 due to temp changes suddenly.I have now got a better incubator and so far all seem...ransfer them into the brooder, with heat lamp, within 12 hours of hatching. When they are 2 weeks old, start decreasing the bulb temp gradually every day, until they are 4 weeks old. Then, they will no longer need to be incubated.