Cockpit

* User Profile

Welcome, Guest. Please login or register.

Login with username, password and session length

Who's Online

  • *Users: 0
  • *Guests: 60
  • *Total: 60

Our Discord

Author Topic: Calling any B747 mechs... please help  (Read 207 times)

Offline kattz

  • Forum GURU
  • *
  • Posts: 58
  • Aviation Enthusiast
  • First Name: Kevin
  • Home Location: Ohio
Calling any B747 mechs... please help
« on: June 30, 2019, 02:11:47 PM »
I've attached a schematic - what are the purposes of the aileron yoke load limiter (big centering cam and serious spring) and the 6° lost motion tang?  The manual says nothing about the function of these devices.  Need to know if I should use any portion of these functions or just let them be and do nothing. 

A rod and heim joints will replace the cables on the lower spool for the yoke linkage, and there's a pulley on the FO yoke to provide positioning to a pot or transducer using an o-ring as the belt.

Thx.

Kev

Offline mickc

  • I may as well be Staff!
  • *
  • Posts: 535
  • Aviation Enthusiast
  • First Name: Mick
  • Home Location: VIC, AU
Re: Calling any B747 mechs... please help
« Reply #1 on: June 30, 2019, 02:53:36 PM »
These are failsafe devices to allow for aileron operation in the event of one yoke becoming jammed, or a cable snapping etc.

A word of advice, don't use an O-ring to drive your position sensor!
You need something indexed and repeatable.  O-rings will move on the pulleys constantly, and you will be forever calibrating your yokes.
Use a toothed belt or similar instead.

Also when replacing the aileron cables between the yokes with the rods, be careful to keep the full range of motion, which can be difficult with solid linkages.   Im not a 747 expert, but i know on the 737 the yokes can move 107 degrees each way, but a lot of replicas and conversions only move 45-60 degrees.
« Last Edit: June 30, 2019, 06:11:01 PM by mickc »

Offline kattz

  • Forum GURU
  • *
  • Posts: 58
  • Aviation Enthusiast
  • First Name: Kevin
  • Home Location: Ohio
Re: Calling any B747 mechs... please help
« Reply #2 on: June 30, 2019, 06:08:50 PM »
Hi, Mick. I couldn't find  aileron drums for my 737, so I bought 747 drums as a lot of the parts are the same.

There are hard stops on the drums, and this gives me about a hundred and five degrees total motion for the yokes.

Thank you for the good advice on the drives for the encoder. It's always good to know of potential problems before you create one.

I should be able to use a mechanical linkage and modify the drum pulleys accordingly. But I will keep an eye on it and if I have to I'll use cables.

Thanks!

 

COUNTDOWN TO WF2019


WORLDFLIGHT TEAM USA

Will Depart in...

Recent Posts

X-Plane 11 multi-monitor & Fly Elise-ng - tuto
by blueskydriver
[July 20, 2019, 05:33:45 AM]
FOR SALE: CA & FO Cockpit Seats with J Rails
by Philip
[July 19, 2019, 04:23:24 PM]
For sale
by TNT
[July 18, 2019, 07:57:29 PM]
For Sale: Dual Linked Rudder Pedals RSP
by Philip
[July 17, 2019, 06:47:22 PM]
737-800 Arduino X-Plane Build
by kurt-olsson
[July 17, 2019, 02:55:53 PM]
Boeing 737 Dual Linked Yokes
by tennyson
[July 16, 2019, 08:59:28 PM]
Flyengravity desktop MIP (SOLD)
by patiju
[July 16, 2019, 02:01:48 PM]
Flight deck solutions FDS-B737NG-PRO-MX- rudder pedal
by Mach7
[July 16, 2019, 04:52:26 AM]
Korry 318 gets hot.
by Joe Lavery
[July 16, 2019, 03:49:14 AM]
What have you done for your simulator today?
by blueskydriver
[July 14, 2019, 10:25:43 AM]
Where to find or how to make this switch guard?
by blueskydriver
[July 13, 2019, 03:46:30 AM]
NIB 747-400 ThrottleTek + FDS CDUs x2 [SOLD]
by blueskydriver
[July 12, 2019, 10:53:12 PM]
FDS 5V IBL Dimmer and Expansion Board / Pokeys 57E (SOLD)
by fsaviator
[July 10, 2019, 08:35:14 PM]
PM MCP.ini Question...
by ScottThePilot
[July 10, 2019, 12:56:38 PM]
Stab Trim Indicator...
by ScottThePilot
[July 09, 2019, 12:56:42 PM]
Teensy LC Throttle Quadrant
by kurt-olsson
[July 08, 2019, 08:09:41 AM]
Multiple Teensys, sketch upload question
by kurt-olsson
[July 08, 2019, 08:05:27 AM]
Anders Simparts - Summer info
by archen
[July 07, 2019, 03:30:31 AM]
Group buy - Oshino OL-2405BP lamps - interested?
by kattz
[July 03, 2019, 09:26:22 PM]
Prosim737 Ver 2 license for sale
by ifeliciano
[July 02, 2019, 09:58:37 AM]
Anyone have this connector and possibly a clamp as well for the yoke?
by mickc
[July 01, 2019, 08:01:04 PM]
Happy Canada Day
by jackpilot
[July 01, 2019, 10:09:40 AM]
MH 370 Article
by FredK
[June 30, 2019, 07:28:41 PM]
Calling any B747 mechs... please help
by kattz
[June 30, 2019, 06:08:50 PM]
International shipping?
by jackpilot
[June 27, 2019, 08:29:07 AM]
Flooring Installed!
by jackpilot
[June 25, 2019, 05:49:57 PM]
How much room between center pedestal and seat?
by jackpilot
[June 25, 2019, 08:19:42 AM]
2020 Microsoft Flight Simulator - new at E3 2019
by blueskydriver
[June 24, 2019, 02:29:16 PM]
How to install DZUS fasteners?
by Buster99
[June 22, 2019, 04:12:34 PM]
Desert Air Spares - Trustworthy?
by kattz
[June 22, 2019, 12:40:51 PM]