Have you heard of them thy would look something like this i would explain it all but i all ready did but it got erased and i am not going to do it again.

Who sells 'em?

Looks cool!

A few years ago I worked on C-5 Galaxy Cargo planes, and there was a similar device used to opperate the seat position locks. I remember playing with one of them one day and thinking what a fabulous pushrod it would make. There was absolutely no friction, smooth as glass. Of course, being military equipment, that little pushrod probably cost $10,000 LOL

But I always wondered if someone made them for this hobby. If they do, I'm a customer!

Well if their is not such a thing i am going to make it it would be way nice.

i am at school so i had to make this fast. school is not fun
any way talk later.

lol $10,000 push rods on a my $100 plane lol.

Now that is a cool idea. Just think, you could mount all your servos right on the cg, in any arrangement or orientation you wanted, then just run the hydraulic lines to cylinders mounted right next to each surface. The lines could run anywhere, no need to make room for the pushrod runs. And the actual pushrod connection to the control surface could be as short and stiff as one wanted. No binding, no slop.

The only drawback I can see would be (maybe) weight and (definately) cost.

It will be interesting to see if any company comes out with one.

Jeremy

Another plus would be that the MFG only has to make the ends, and then supply some fairly stiff tubing, and you can make them any length you need.

There would also be no problem with turning tight corners, and there would never be any binding.

Just be sure to get all the bubbles out!

hahahahahaha

"What are you doing?"
"Bleeding my pushrods."
"Have you been drinking?"



The only thing I don't like about this setup is the reliability factor. If a pneumatic retract setup fails, you either belly land or fly with the wheels down. If a hydraulic control surface setup fails, you lose the plane.

I guess that's why real aircraft have redundant systems redundant systems.
<g>

-Joe

i know hydro push rod's would be efficient just make sure your tubes are connected, not kinked, and not cut and thy would be reliable. And about the wight you could get it way down with a very thin cylinder at the opposite end of the servo like the size of the hose that way would be the best to not restrictions to the flow in and out of the piston because it would be the same size as the tube.

Yes MinnFlyer right on get all that air out, air is very compressible and it will expand and contract and that will mess with your trim bad. First one to make it post hear I want to know how well it works.

Damn... I saw that pushrod about 10 years ago, and I hadn't thought about it for a long time. But now my mouth is watering again. I wish I still had access to my machine shop, I'd prototype a few. That thing really was SWEET!

BTW Hummve, the cylindars were only about 3/16".

that small nice

It was sort of like this...

Cool i want to try to make one.