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  #1  
Old 07-06-2007, 07:46 AM
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Location: Northwestern Ohio
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Default Nose Gear Warning Circuit

I received an e-mail asking about a warning circuit for the nose gear: The switch may have been part of a gear warning circuit.

NOSE GEAR WARNING

Install two switches:

1) Normally Closed (NC) micro-switch on the nose gear. Its adjusted so it opens when the gear is down and over center.

NOTE: Jack Wilhelmsons EZNOSELIFT system has an extra micro-switch installed that can be used for the warning circuit.

2) Normally Open (NO) micro switch on the Throttle level. This switch is adjusted so that it closes when the throttle is at its idle position.

Theory of operation:

These two switches are wired in series. They control power to a warning horn (LOUD HORN) Do not use a light or a cute buzzer, you will ignore them. Use a car horn

(junk yard).

When the throttle is moved to idle, this switch closes, if the gear is not down and over center, the horn will sound.


Waiter
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  #2  
Old 07-06-2007, 12:35 PM
swinn swinn is offline
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Default Re: Nose Gear Warning Circuit

You won't miss these going off in your cockpit.

http://www.autobarn.net/noname6.html

Never thought of a car horn, but you certainly do need a loud horn to hear it over the airplane noise, through the ANR headsets, etc. Don't ask me how I know.
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  #3  
Old 07-06-2007, 12:42 PM
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Default Re: Nose Gear Warning Circuit

I'd avoid an airhorn, as you would hear it the first time, but after that you wouldnt hear ATC
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Old 07-06-2007, 01:04 PM
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Default Re: Nose Gear Warning Circuit

Another nice thing about loud horns, It gets the attention of everyone on the ground, so they can stop what their doing and re-focus their attention on the idiot who's about to land gear up.

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  #5  
Old 07-08-2007, 03:55 AM
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Default Re: Nose Gear Warning Circuit

Try a piezo electric siren, small light and capable of lots of db's and available from any electronics store.

Jamie
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