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Switch for Hobbs.

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mp.gamble(at)tiscali.co.u
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Posted: Mon May 05, 2008 8:20 am Post subject: Switch for Hobbs.

What are chaps using to switch their hobbs timer on  with engine start? Is there an alternative to the n/o oil pressure switch? -  perhaps sensing alternator output.

 Thanks

 Mike Gamble

   [quote][b]

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topglock(at)cox.net
Guest

Posted: Mon May 05, 2008 9:58 am Post subject: Switch for Hobbs.

Mike,



I used a standard marine ignition switch to supply current to the 

starter, with rockers for the ignition circuit.  The "run" side of the 

ignition switch supplies power for the hobbs and the trim circuit breaker.



Jeff - Baby Blue



Mike Gamble wrote:

 	  Quote: 	
		   What are chaps using to switch their hobbs timer on with engine start? 

 Is there an alternative to the n/o oil pressure switch? - perhaps 

 sensing alternator output.

 Thanks

 Mike Gamble

 

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 *

 

 

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nwcmc(at)tiscali.co.uk
Guest

Posted: Tue May 06, 2008 6:34 am Post subject: Switch for Hobbs.

Attached is the circuit I used.

  

 Nigel  Charles

  

  

 

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gcsmith(at)flyer.co.uk
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Posted: Wed May 07, 2008 7:04 am Post subject: Switch for Hobbs.

I used a small vacuum switch from Radio Spares connected to the engine-driven vacuum pump

  

 Graeme Smith

 G-CCGW

 



 

 2008/5/5 Mike Gamble <mp.gamble(at)tiscali.co.uk (mp.gamble(at)tiscali.co.uk)>:

 [quote]  What are chaps using to switch their hobbs timer on with engine start? Is there an alternative to the n/o oil pressure switch? - perhaps sensing alternator output.

 Thanks

 Mike Gamble

 	  Quote: 	
		  

	




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Troy Maynor

Joined: 10 Jan 2006
Posts: 162

Posted: Thu May 08, 2008 6:13 pm Post subject: Switch for Hobbs.

Mike,

Aeroelectric sells a double throw oil pressure switch you can connect up that when engine is not running turns on an oil light LED for a Master Switch left on warning, and flips the other way when engine is running to operate a hobbs. FWIW......Not flying yet so can't vouch, but that's my plan. 



Troy Maynor

Visit -  www.EuropaOwners.org

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