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  Apollo rotation versus translation hand controllers

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Author Topic:   Apollo rotation versus translation hand controllers
moonguyron
Member

Posts: 191
From: Trinity, FL USA
Registered: Jan 2011

posted 08-18-2014 03:16 PM     Click Here to See the Profile for moonguyron   Click Here to Email moonguyron     Edit/Delete Message   Reply w/Quote
Since Michael Key (cS modeler) is in the process of making 1:1 Apollo command module hand controllers for me, I thought I should know more than I do about their operation.

I know what the book says about both and the difference; however questions remain. For instance, in the translation and docking maneuver, the translation controller would be used to fire the CM forward and aft facing jets to move forward and aft along the X axis.

But in that attitude (CM probe facing the LM drogue) if one wanted to move left/right/up/down what combination of thrusters could possibly be used to translate left/right/etc.? The rotational controller could give you yaw but then we have an unwanted angle with respect to the CM and LM.

Hope this makes sense. Can someone help?

David C
Member

Posts: 1014
From: Lausanne
Registered: Apr 2012

posted 08-18-2014 03:28 PM     Click Here to See the Profile for David C     Edit/Delete Message   Reply w/Quote
You nudge the T-handle left or right as required to translate laterally (Y axis), up or down to translate vertically (Z axis).

moonguyron
Member

Posts: 191
From: Trinity, FL USA
Registered: Jan 2011

posted 08-18-2014 04:43 PM     Click Here to See the Profile for moonguyron   Click Here to Email moonguyron     Edit/Delete Message   Reply w/Quote
Sorry, I'm slow, but your explanation leaves me with the original question.

Knowing the placement of the CM RCS I cannot visualize how you can translate up or down. Attitude change (pitch, roll, and yaw) make sense. But what combination of thrusters produce translation while maintaining the original attitude?

moonguyron
Member

Posts: 191
From: Trinity, FL USA
Registered: Jan 2011

posted 08-18-2014 04:47 PM     Click Here to See the Profile for moonguyron   Click Here to Email moonguyron     Edit/Delete Message   Reply w/Quote
Never mind. The light finally dawned. Thanks.

All times are CT (US)

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