Something new more in line with a HPR than orbital launcher.
The OD of the can is 4.0" The Red things are DS3717HV servos.
posted by Paul Breed at 6:57 PM
Wednesday, December 14, 2011
The OD of the can is 4.0" The Red things are DS3717HV servos.
7 Comments:
Why not two gimbaled HPR or peroxide motors? That works in space as well.
Steve
why 4 servos? Why not one connected to a disk, rods up from the axles through holes in the disk, the disk on a simple bearing mounted in the center. A simple bushing on the disk for each. Disk rotates, all four axles turn in the right direction, one servo instead of four. Should be lighter.
Actually this is for 3 axis of control. One could get away with 3 servos, but 4 is conceptually easier to do.
Paul,
If there's any substantial torque back through the system, all those 90 degree bends are going to give you a lot of backlash, I would think. Why not just mount the servos so that their axes are perpendicular to the wall of the tube, and mount the control surfaces directly to them?
There are pretty standard ways of making missile fins.
Those are ball joints, very little play, hard to get the direct shaft alignment right.
Paul,
This might interest you, acouple of students down under here have done something similar http://www.ucrocketry.com/, not alot of info on their site but you get the gist of it. I've had a look their hardware and its a similar set up to your concept.
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