Good morning from NE Wisconsin. Mid 60s, heading to the upper 80s. Here's a photo of the slightly waning gibbous moon we got since we were out a little early.
Have a great Thursday, everyone!
I learned that the SR 71 used cables to control flight surfaces
Since it was a delta wing shape, and the elevator/ailerons were the same surface, they used a MECHANICAL mixer
Literal cables and pulleys being used to control an aircraft going Mach 3.2
SR 71 pilot David Peters clarifies: It is a bit of a misnomer to describe it that way. Cable flight controls were directly connected from the stick to the control surface. In some cases, you actually moved the whole surface in most, you moved a small portion that, in turn, “flew” the surface into the position you asked for.
These were called control tabs. It’s pretty much the same as trim tabs on that kind of control. Example P 51. Our system had the stick moving hydraulic servos which positioned the flight controls through cables. This was due to heat problems more than any thing. This is just like any modern airplane except they don’t use cables but hydraulic from the servos. Works the same way.
(I found this on X Delian; I have modified the post by adding my pictures and comments)
Thank you SR Pilot David Peters for adding his expertise. His knowledge is priceless to me.
Linda Sheffield