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AW: New HOBBS Idea

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Alfred Buess

Joined: 11 Jan 2006
Posts: 67

Posted: Wed Apr 30, 2008 11:40 pm Post subject: AW: New HOBBS Idea

There is another clever solution for hooking up the Hobbs to your engine:

Comco Ikarus (http://www.comco-ikarus.de/index_english.html) sells an

electronic filter produced by Utz Schicke (producer of the Schicke GR6

regulator for Rotax engines) which hooks directly to the AC wires of the

alternator. Whenever the alternator is in action (even with the regulator

shut off), the Hobbs (or an other brand of hour meter) gets DC power and is

active too. I got my filter for 65 Euros.



Alfred

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨

¨¨¨

Alfred Buess, CH-3052 Zollikofen, Switzerland

E-Mail: ykibuess(at)bluewin.ch

Europa XS #097, Monowheel, Foam wing, Rotax 912ULS, Airmaster 332 CS

-----Ursprüngliche Nachricht-----

Von: owner-rotaxengines-list-server(at)matronics.com

[mailto:owner-rotaxengines-list-server(at)matronics.com] Im Auftrag von rampil

Gesendet: Montag, 14. April 2008 12:43

An: rotaxengines-list(at)matronics.com

Betreff: New HOBBS Idea






At SnF this year, my best find was a small device for engine time recording.

It is completely independent of and connections to the rest of the aircraft

(power or engine).  It time the duration of vibration!



When the engine is running, the timer is going with its own 5 yr battery.

Its made by ENM and I purchased it at PSA aircraft Supply (Lakeland, FL) for

$22 (half retail from ENM)



--------

Ira N224XS





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nuckolls.bob(at)cox.net
Guest

Posted: Tue May 06, 2008 11:08 am Post subject: AW: New HOBBS Idea

At 09:37 AM 5/1/2008 +0200, you wrote:



 	  Quote: 	
		  

<ykibuess(at)bluewin.ch>



  There is another clever solution for hooking up the Hobbs to your engine:

Comco Ikarus (http://www.comco-ikarus.de/index_english.html) sells an

electronic filter produced by Utz Schicke (producer of the Schicke GR6

regulator for Rotax engines) which hooks directly to the AC wires of the

alternator. Whenever the alternator is in action (even with the regulator

shut off), the Hobbs (or an other brand of hour meter) gets DC power and is

active too. I got my filter for 65 Euros.


	


    It's also possible to do-it-yerself. Here's an approach

    I sketched for some folks several years ago:



http://www.aeroelectric.com/Pictures/Schematics/Hourmeter_Adapter_for_PM_Alternators.pdf

    It's a simple AC/DC rectifier combined with a shunt regulator

    to keep the capacitor from charging up to un-restrained maximum

    that can be well over 50 volts in cruise rpm.



    The transistor needs to be heat-sinked to an aluminum

    enclosure. It should also be insulated from the heatsink.

    Hence the call-out for an insulator kit on the drawing.



    Bob . . .

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longg(at)pjm.com
Guest

Posted: Tue May 06, 2008 11:57 am Post subject: AW: New HOBBS Idea

Ira,

	Great find. This has to be the simplest solution yet. No wires! Yeah! I suppose it still have moving parts like those old Swiss watch movements where you shook them up to wind them, but it should last for years. The best price I found so far is about $50.00 from ENM. If anyone finds a better price, please post.



--

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rampil

Joined: 04 May 2007
Posts: 870

Posted: Wed May 07, 2008 3:01 pm Post subject: Re: AW: New HOBBS Idea

Hi LongG,



It may have been a show special price, but PSA is still worth a try at

http://www.psaenterprises.com/



I am using the little guy in car at the moment, trying to build some hours on it

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_________________
Ira N224XS

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