Capt Kremen Posted November 28, 2015 Share Posted November 28, 2015 Couldn't find my good old 'Radio Modeller' books illustrating installations to look this up or find a suitable thread on here ... Scenario: A swept back rudder control installation e.g. a Red Arrows Hawk jet has an angled rudder hinge line like ' / ' If using a push-rod connection from the rudder servo: (A) What sort of control horn would be best to fit to the rudder, a '90 degree' or 'swept forward' one and in which orientation? (B) Servo Arm or Disc with a conventional clevis or is a ball-link clevis better - see 'C' (C) How to allow for the 'rise' in push rod travel as the rudder deflects? Would a ball-link be best? (A closed-loop set up or installing the servo at an angle in the tail is not an option in this case). Quote Link to comment Share on other sites More sharing options...
Geoff S Posted November 28, 2015 Share Posted November 28, 2015 The RM book recommends three possible solutions: 1: Use a snake angled to be normal to the rudder pivot. They actually say a tube/cable pushrod rather than a snake and didn't seem very keen on the idea. Perhaps snakes weren't available in 1975 when my secondhand copy was touchingly gifted to 'My dear Arthur' at Christmas. 2. A nylon horn scewed onto a through bolt which is free enough to turn as the control is applied. 3. A ball joint but it points out that the exit slot needs to allow for the rise and fall of the push rod which will be at rightangles to the hinge. I picked my copy up at a local secondhand bookshop in Cromford several years ago for £2. Despite its age there's still a lot of useful information and it's interesting to read about older radio systems and reflect how lucky we are now with modern computer sets. Geoff Quote Link to comment Share on other sites More sharing options...
Former Member Posted November 28, 2015 Share Posted November 28, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
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