Chris Lunt
Member
I wonder if I can lay myself open to ridicule and ask my fellow builders a really numpty question about using diodes in relays.....?
I'm using Vans' RV7 flap motor, Ray Allen Company(RAC) trim switches and pitch trim motor, and wish to incorporate servos to activate my flaps and trim motor.
I'm using AircraftExtra's servos but specific manufacturer aside, my question is far more generic.
I am trying to instal these servos in my flap and pitch trim circuits.....and good old Bob Nuckolls has provided the very schematics I need...
Flap Circuit: http://www.aeroelectric.com/articles/flaps.pdf
Trim Circuit: http://www.aeroelectric.com/articles/trim2.pdf
RAC have also been most helpful in supplying advice on their schematics, my set up uses a RAC rocker (RS2) and sticktop buttons ... shown on page 2 here: http://www.rayallencompany.com/RACmedia/instructionsRS2withmods.pdf
I've attached my simplistic shop notes
I realise that collapsing magnetic fields around relays induce reverse current, and hence, the requirement for diodes in the RAC trim schematic and across the trim relay terminals in Bob Nuckolls' Trim wiring diagram above.
Sooooooooo, getting to my point...
Bob Nuckolls does not show diodes in his flap servo diagram above...
To my uneducated eye the flap motor uses the same servo, inherently the same problem must exist...?
I'm guessing I'm missing something somewhere....but should I instal diodes in both my FLAP and TRIM relays...?
Doffing my cap to Bob, RAC and you wonderful folks out there....
I'm using Vans' RV7 flap motor, Ray Allen Company(RAC) trim switches and pitch trim motor, and wish to incorporate servos to activate my flaps and trim motor.
I'm using AircraftExtra's servos but specific manufacturer aside, my question is far more generic.
I am trying to instal these servos in my flap and pitch trim circuits.....and good old Bob Nuckolls has provided the very schematics I need...
Flap Circuit: http://www.aeroelectric.com/articles/flaps.pdf
Trim Circuit: http://www.aeroelectric.com/articles/trim2.pdf
RAC have also been most helpful in supplying advice on their schematics, my set up uses a RAC rocker (RS2) and sticktop buttons ... shown on page 2 here: http://www.rayallencompany.com/RACmedia/instructionsRS2withmods.pdf
I've attached my simplistic shop notes
I realise that collapsing magnetic fields around relays induce reverse current, and hence, the requirement for diodes in the RAC trim schematic and across the trim relay terminals in Bob Nuckolls' Trim wiring diagram above.
Sooooooooo, getting to my point...
Bob Nuckolls does not show diodes in his flap servo diagram above...
To my uneducated eye the flap motor uses the same servo, inherently the same problem must exist...?
I'm guessing I'm missing something somewhere....but should I instal diodes in both my FLAP and TRIM relays...?
Doffing my cap to Bob, RAC and you wonderful folks out there....