WWW.PROTu-154.org
Project Tupolev Team Forum Index Log in Register FAQ Memberlist Search

Project Tupolev Team Forum Index » Yakovlev Yak42 Support Forum » Yak 42 Autopilot Need Help
Post new topic  Reply to topic View previous topic :: View next topic 
Yak 42 Autopilot Need Help
PostPosted: Sun Apr 22, 2007 02:51 Reply with quote
Stanner
Joined: 18 Apr 2007
Posts: 6




Thanks to Michael, I have been able to find my way around the YAK 42. However, I am unable to:

1. Get the Autopilot to operate, and
2. To get the autopilot to follow the plan in the GPS Garmin

All the following are page references in the Yak 42 documentation.

I note on page 11 that the autopilot function will fail if:
a. Course system was not slaved.
How is this done?
b. Gyroscopes were not caged (MGV)
Does this mean aligning the Vertical and Directional (HSI) gyros?
I know how to align the Vertical Gyro, and Michael instructed me on
how to align the Directional HSI gyro.

Any help will be appreciated
Thank you.
Stanner

_________________
STANNER
View user's profile Send private message Send e-mail

PostPosted: Sun Apr 22, 2007 09:14 Reply with quote
ha5mvo
Joined: 23 Jan 2005
Posts: 2233
Location: Toronto, Canada




Hi Stanner,
The Yak-42 has its own section now on these boards , so I moved it to the appropriate forum. You can post all the Yak42 related issues here.

As fot your questions:
You got it right. The term "course system" refers to to directional gyros, and indeed the AP won't work unless you align the artificial horizon and the HSI/RMIs

Here are a couple of screenshots that would hopefully shed some more light on this:

*Edit*
I got the order of the shots backward...so work through them from the bottom ot just follow the number sequence


Last edited by ha5mvo on Sun Apr 22, 2007 09:24; edited 2 times in total

_________________
//Michael
View user's profile Send private message

PostPosted: Sun Apr 22, 2007 09:20 Reply with quote
ha5mvo
Joined: 23 Jan 2005
Posts: 2233
Location: Toronto, Canada




ok, continued...

_________________
//Michael
View user's profile Send private message

PostPosted: Sun Apr 22, 2007 09:23 Reply with quote
su-30
Joined: 10 Nov 2004
Posts: 186
Location: Moscow UUWW




Small picture
View user's profile Send private message Send e-mail

PostPosted: Sun Apr 22, 2007 09:26 Reply with quote
su-30
Joined: 10 Nov 2004
Posts: 186
Location: Moscow UUWW




Hehe ha5mvo your tutorial most detailed
View user's profile Send private message Send e-mail

PostPosted: Sun Apr 22, 2007 09:34 Reply with quote
ha5mvo
Joined: 23 Jan 2005
Posts: 2233
Location: Toronto, Canada





Some of my explanatory notes were clipped, maybe I do tend to ramble too much....

_________________
//Michael
View user's profile Send private message

PostPosted: Sun Apr 22, 2007 20:57 Reply with quote
UR5WCW
Joined: 07 Apr 2007
Posts: 20
Location: Lviv / UKLL




ha5mvo wrote:

Some of my explanatory notes were clipped, maybe I do tend to ramble too much....

Hi Michael!
Good explanations. Thanks for the help!!!

_________________
Vlad UR5WCW
-----------------
Lviv Yak42 Group
View user's profile Send private message

PostPosted: Mon Apr 23, 2007 09:42 Reply with quote
su-30
Joined: 10 Nov 2004
Posts: 186
Location: Moscow UUWW




ha5mvo wrote:

Some of my explanatory notes were clipped, maybe I do tend to ramble too much....


Small addition, you need press "" for arristing small gyro, hold button at 5-7 sec, and light " ." off.
View user's profile Send private message Send e-mail

PostPosted: Mon Apr 23, 2007 10:52 Reply with quote
ha5mvo
Joined: 23 Jan 2005
Posts: 2233
Location: Toronto, Canada




su-30 wrote:
ha5mvo wrote:

Some of my explanatory notes were clipped, maybe I do tend to ramble too much....


Small addition, you need press "" for arristing small gyro, hold button at 5-7 sec, and light " ." off.


Yes, I noticed that after doing the shots, but was too lazy to repeat the sequence for the extra "educational" value

By the way, the standby horizon seems to be aligned at startup, does the button actualy align it or is it just tied to the warning lamp? ( the gyro seemed to gibe correct indicatons even when I didn't align it)

_________________
//Michael
View user's profile Send private message

PostPosted: Mon Apr 23, 2007 20:54 Reply with quote
UR5WCW
Joined: 07 Apr 2007
Posts: 20
Location: Lviv / UKLL




ha5mvo wrote:
su-30 wrote:
ha5mvo wrote:

Some of my explanatory notes were clipped, maybe I do tend to ramble too much....


Small addition, you need press "" for arristing small gyro, hold button at 5-7 sec, and light " ." off.


Yes, I noticed that after doing the shots, but was too lazy to repeat the sequence for the extra "educational" value

By the way, the standby horizon seems to be aligned at startup, does the button actualy align it or is it just tied to the warning lamp? ( the gyro seemed to gibe correct indicatons even when I didn't align it)

Hi!
No, the standby hyrogorizon is not aligned at start up. The indication light exactly shows its' alignment . Yak-42 has three gorizons - left (indication on left PKP), right (right PKP) and standby(warning light).
AP using signals from two hyroscopes for normal work and a/c position calculations.
During the flight try to switch off the power for example of right PKP, you will see the warning light " " lit. AP will continue to work, but if the second one will fail - AP will switch off.

_________________
Vlad UR5WCW
-----------------
Lviv Yak42 Group
View user's profile Send private message

Yak 42 Autopilot Need Help
 Project Tupolev Team Forum Index » Yakovlev Yak42 Support Forum
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum
All times are GMT + 3 Hours  
Page 1 of 1  

  
  
 Post new topic  Reply to topic  


  Powered by phpBB © 2001-2005 phpBB Group. Designed for protu-154.org | Webmaster - ^COOLER^