I would like to use 2 linear actuators to move 2 skis on an amphibian seaplane. the twin hull seaplane will weigh between 5&6 pounds. the issue might be the impact of the water during takeoff. should I use a higher gear ratio to increase the backdrive force needed to collapse the skis on rough water takeoff? what would be the extension time of the 30mm 100:1? the 30mm 210:1? what is the weight of each of the aforementioned actuators? can I use a y connector to drive them from a prisim 7 transmitter? thanks flyboyusvi
You can always use a shock absorber as well to help the impact (find a good place which is out of the way).
robotshop.com/en/oil-less-sh … s-4pk.html
robotshop.com/en/actobotics- … -pair.html
A higher gear ratio would make it harder to back drive, but without knowing the imact force, it’s hard to know what will break first - the case or something else.
You can get the mass of each actuator here: robotshop.com/media/files/pd … heet-2.pdf
You can use a Y harness to drive both at the same time and with the same signal.
thank you for the reply. you gave me all the info i need except the extension times. i would go with the 210: 1 unless the extension time is too long. the takeoff will only be a few seconds (unknown at this time). the skis will be extended after takeoff run has begun. the purpose of the skis are to reduce the drag of the large hull. the cost and complexity of the installation demand i make a good estimate the first time. can you tell me what the extension times are or where i can find them? L12R - 210:1, 100:1 AND 50:1. thanks
It’s different for different gear ratios and strokes. Within the same document, you can see the "Max speed (no load) is provided, and it gets slower with increasing load. You also see the speed at peak power. Knowing the speed and stroke, you can get the extension time.