Here's another set of miscellaneous long-period oscillators found recently—
First is a huge Period 12 Oscillator found by Jason Summers. It consists of two pairs of Period 6 Fountain Oscillators
flipping back-and-forth a Period 12 Rotor.
A Period 25 Pre-Pulsar Pusher, also found by Summers. The Period 5 Oscillators provide sparks which push the Pre-Pulsar
3 cells in 11 generations, while the stable objects return it in 14 generations.
Another type is a Period 44 Oscillator. Shown here are two ways to suppress the double Pi Heptominoes thrown off
every cycle. He suggests that these Pis can be perterbed to produce other objects, including Glider Guns.
Nicolay Beluchenko found a number of ways to two or four of these Period 44 engines to interact and support each other.
Shown here are just a sample of these.
Beluchenko also found a wick version, for which Artem Dergachev found the simple Block
stabilizers.
Finally, Beluchenko was able to create a Glider Gun by changing the phase of one of the rotors
and using a Fishhook Eater to suppress part of the interacton between the two.