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General Instrument and engine questions. first of a million

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mosquito56

Joined: 24 Aug 2007
Posts: 77
Location: Laredo, Tx

Posted: Fri Oct 12, 2007 9:32 pm Post subject: General Instrument and engine questions. first of a million

I am just getting to the interesting parts of the plane, Instrument Panel and fwf. I will shoot out a couple of the questions I wrote down from today. These are in no logical, if I were logical I would be building a bar, not an airplane, order.



1. Ags ingtiions system. Do the locks work on the 601xl? What is a good Ignition switch? Does the ignition switch come with the jab3300 fwf?

2. How can I make it so the hobbs meter only runs when the engine is running? If you've ever left your ignition on you'll understand this one.

3. Dynon ems120, do you need a seperate fuel sender or is the resistance all that is needed. What do you think of Dynon in general?

4. Any thoughts on Grand Rapids efis?

Thanx much



Don

N601NV reserved

Starting fuse

Laredo, Tx

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Sat Oct 13, 2007 5:17 am Post subject: General Instrument and engine questions. first of a million

For question 2. B and C Specialty Products ( http://www.bandc.biz/parts.html ) sells a double pole oil pressure switch for this. One contact grounds the oil light circuit when no pressure is present and the other can provide a ground to the Hobbs when the pressure is up. It's only available with 1/8 NPT so I don't know if its suitable for the Jabiru.

On Oct 13, 2007, at 1:32 AM, mosquito56 wrote:

 	  Quote: 	
		  --> Zenith-List message posted by: "mosquito56" <mosquito-56(at)hotmail.com (mosquito-56(at)hotmail.com)>

I am just getting to the interesting parts of the plane, Instrument Panel and fwf. I will shoot out a couple of the questions I wrote down from today. These are in no logical, if I were logical I would be building a bar, not an airplane, order.

1. Ags ingtiions system. Do the locks work on the 601xl? What is a good Ignition switch? Does the ignition switch come with the jab3300 fwf?

2. How can I make it so the hobbs meter only runs when the engine is running? If you've ever left your ignition on you'll understand this one.

3. Dynon ems120, do you need a seperate fuel sender or is the resistance all that is needed. What do you think of Dynon in general?

4. Any thoughts on Grand Rapids efis?

Thanx much

	






 -- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.

 



 [quote][b]

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_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

shilcom

Joined: 28 Sep 2007
Posts: 63

Posted: Sat Oct 13, 2007 6:26 am Post subject: General Instrument and engine questions. first of a million

<<2. How  can I make it so the hobbs meter only runs when the engine is running? If you've  ever left your ignition on you'll understand this  one.>>

  

 Oil pressure switch.  

  

 Bob U. 

  

 [quote]   ---

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planecrazydld(at)yahoo.co
Guest

Posted: Sat Oct 13, 2007 7:36 am Post subject: General Instrument and engine questions. first of a million

I always thought that the Hobbs was powered through an oil pressure switch.

 

  Dave Downey

 Harleysville (SE) PA

 100 HP Corvair



 



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engineerguy3737(at)yahoo.
Guest

Posted: Sat Oct 13, 2007 8:52 am Post subject: General Instrument and engine questions. first of a million

3. The resistance is all that is needed to calculate fuel level. If you want fuel flow, you need to buy a separate sensor. 

    I think Dynon is a great company, but I am biased.



-Dan Lykowski

Dynon Avionics



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jetboy

Joined: 22 Jul 2006
Posts: 233

Posted: Sat Oct 13, 2007 8:21 pm Post subject: Re: General Instrument and engine questions. first of a mill

The Jabiru already comes with oil pressure sender that has a spare additional contact for grounding the idiot light or hobbs meter when pressure is below 7 psi.



This is a good idea because those senders do fail when the wiper inside wears thru the wire at the normal oil pressure spot and if your hobbs is still running or the light is off its OK to continue. There is also a spare port on the oil gallery, the real one that goes to the main bearings, that can be used to mount a switch ( i used one for a Mazda RX7 they are a lower pressure )



I prefer analog gauges and used the Mitchel range from ACS



Perhaps mechanical gauges would be even better however I dont think the engine could run for long if the oil line came off you havent got 5 or 6 quarts spare like on a Continental or Lycoming



Ralph

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Ralph - CH701 / 2200a

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