Hi all.Adopted solution to give hidralic sensation to the controls of the speed Brake, is superb.To press on the image in the web to see greater.http://personal.telefonica.terra.es/web/ka...t/pedestal.htmlhttp://forums.avsim.net/user_files/101957.jpgSaludosRafael

This looks like a good idea. It might be adaptable to other controls.John

Another way to simulate hydraulic is to attach the command on a turning disk with to side disk and to put some viscous fat between the disks that cause friction.This principle is used in my logitech 3D joystick for the throttleBOB

>Another way to simulate hydraulic is to attach the command on>a turning disk with to side disk and to put some viscous fat>between the disks that cause friction.>>This principle is used in my logitech 3D joystick for the>throttleI used the bread cutting board for my throttles, that works too. But of course you then need a adjustment screw since the friction wears out the material and it needs to be tightened over time. But it works very well too.Or use a suspension unit - a car suspension can be a bit too "manly" for a speed brake, but I have some washing machine suspension units (maybe there are moped ones or motorbike suspension units that might be a bit lighter construction?)It's easy to adjust the resistance force with the length of the lever arm. And those do not wear. They give a very solid heavy feel for yokes for example, could be combined to springs or something to give centering.//Tuomas

Hi Rafael,this looks nice. Looks like a two-way hydraulic/oil damper. Is the cylinder bought or did you make it yourself ?It kinda looks like a piece of 3/4" water pipe. I'm assuming there is no spring inside, right ?Regards,Manuel

Hello, I have proven all the systems, and this is the best one, the sensation obtained by the passage of hydraulic fluid from a camera to another through a small orifice is superb. This system I have applied to movement of ailerons improving considerably the sensation, it has proven it a professional pilot of the 737 and it has said to me that it is the system very well. I have used pneumatic pistons "Festo, diameter 12 mm, 90 mm of route" bought surplus, fillings with liquid of brakes, without springs.SaludosRafael

Rafael,thanks for the info. I am new to this and trying to learn. From your picture, it is not clear how you are connecting the airbrakes. you mind explaining please? Are you making and breaking contact with a switch when brakes are applied or breaking action is progressively measured? Also, wondering what is the advantage in using pneumatic cylinder and filling it up with fluid. Why not use a hydraulic cylinders directly. Are you facing any fluid leaking issues? With this setup, i guess piston stays in position, once you apply pressure and push/pull it in one direction. correct? Can you post the details of ailerons system also? Are using it to connect FO/capt yokes or for getting the heavy feel on one yoke?Here is something similar in concept but another variation..http://www.dutch-mountains.com/hydraulics.htmlCan someone compare and comment on this other design.thankssrini