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Home✈️Aircraft🚁HelicopterBeginners Corner › Gyro position
11-12-2005 04:27 AM  14 years ago
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Rum95

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Puerto Rico

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Gyro position
Hi;


Does the orientation of the gyro affect its functioning? Lets say that I have my gyro mounted at the boom, if you have a top view the nose is north. I’m using a Futaba 401 and right now the name is in normal position. If I rotate the gyro 90 degrees the name will be parallel to the boom and if I rotate 180 degrees the name will be upside down. Is there a “correct position” or it doesn’t matter as long as I correct the direction on the gyro itself (the rev/nor switch).
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11-12-2005 04:40 AM  14 years ago
jbiter

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Sebring, FL

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In short, yes.

You can mount a 401 with the nameplate facing up or towards the bottom but the latter makes it rather hard to adjust the switches... In the old days we used to invert the gyro as you described to reverse it.

If you mount on the side the gyro will react only to changes about the lateral axis... No good

Jeff
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11-12-2005 05:03 AM  14 years ago
Thule

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Monroe, WA

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I think he's asking what happens if you spin the gyro. Say, does it matter if you can read the writing on the gyro when looking at it from the nose vs. whether the writing is facing the tail. Or, does it matter if the writing is facing port or starboard.

I'm curious as well
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11-12-2005 05:13 AM  14 years ago
Rum95

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Puerto Rico

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yep...that's the question.....
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11-12-2005 09:07 AM  14 years ago
DOKEY

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Northamptonshire UK

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If I rotate the gyro 90 degrees the name will be parallel to the boom and if I rotate 180 degrees the name will be upside down. Is there a “correct position” or it doesn’t matter as long as I correct the direction on the gyro itself (the rev/nor switch).
No
Ryan.
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11-12-2005 11:16 AM  14 years ago
PaulJC

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Hertfordshire UK

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As long as it is facing, forwards or backwards and not to he side it will operate fine with the correct switch settings
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11-12-2005 02:13 PM  14 years ago
BarracudaHockey

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Jacksonville FL

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Why wouldn't it work if it was facing to the side?

The answer is no it doesnt matter as long as the top is facing up. It senses rotation about an axis and corrects. The gyro doesnt know or care which way its facing within that axis of rotation.
Andy
AMA 77227
http://www.jaxrc.com
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11-12-2005 02:16 PM  14 years ago
nivlek

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Norfolk England

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The answer is no it doesnt matter as long as the top is facing up.
It wouldn't matter if the top was facing down .
At the end of the day , it gets dark .
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11-12-2005 03:20 PM  14 years ago
BarracudaHockey

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Jacksonville FL

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Well thats true but aside from not being able to access the switches, in that case you would have to reverse the gyro.Andy
AMA 77227
http://www.jaxrc.com
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11-12-2005 04:11 PM  14 years ago
pH7

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Sterling Heights, MI - USA

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What we have here is a failure to communicate.

If the heli is sitting in a normal position on the floor and you are standing over it looking down and you can see the name plate then it will work. It doesn't matter whether the name is right side up, upside down, rotated to any angle - doesn't matter. As long as the top surface of the gyro is pointed up toward you, it's OK.

Now to clarify (I hope) - If the heli is sitting on a table and you are looking directly at the side of the heli and the gyro is oriented so that you can see the name plate, then BAD. The gyro would be sensing nose down, nose up and therefore would not be sending the correct signals to the tail rotor.

Hope that helped instead of making it more confusing.
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11-12-2005 05:35 PM  14 years ago
BarracudaHockey

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Jacksonville FL

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Now I'm confused! Andy
AMA 77227
http://www.jaxrc.com
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11-13-2005 08:32 AM  14 years ago
AussiJohn

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Perth Western Australia

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Hang on. I can lay on my back, under my HB3dpro, and read the nameplate on my gy240. It also works up side down

This has become confusing eh??

John
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