Not really a review because I haven't tried one, but an article in the June 2022 issue of "Practical Electronics" points out that these are getting much cheaper.
Could have uses in submarine applications requiring a bit of "linear grunt" e.g piston tanks, trim weights??
Possible choice below:

30mm/50mm/100mm/150mm DC 12V 30N/60N/90N/150N Linear Micro Actuator Motor Controller Mini Electric Push Rod Putter
4.8
71 Reviews
350 Orders
US $19.67
Speed (rpm) : 30mm
30mm
50mm
100mm
150mm
Tension (V) : 150N
30N
60N
90N
150N
Could have uses in submarine applications requiring a bit of "linear grunt" e.g piston tanks, trim weights??
Possible choice below:

30mm/50mm/100mm/150mm DC 12V 30N/60N/90N/150N Linear Micro Actuator Motor Controller Mini Electric Push Rod Putter
4.8
71 Reviews
350 Orders
US $19.67
Speed (rpm) : 30mm
30mm
50mm
100mm
150mm
Tension (V) : 150N
30N
60N
90N
150N
Last edited by david f on Thu May 05, 2022 11:15 am; edited 2 times in total
» 915mhz / 868mhz as a viable frequency for submarines.
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» Upholder build instructions
» Antennas - Underwater
» Single Channel Remote for submarines
» self contained compressor and solenoid valve for bladder systems.
» New to this forum and first submarine
» USS Bluefish