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Instrument markings

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Mike Whisky

Joined: 05 Jun 2006
Posts: 336
Location: Switzerland

Posted: Thu Feb 07, 2013 2:59 pm Post subject: Instrument markings

Hi everyone,



I attached a picture with my planned instrument markings (EFIS/EM settings) to ask if you could please verify. I have an TMX-IO540 (IO-540 D4A5) engine and extracted all information I could from the Lycoming Operator's Manual.



Could you please help to verify especially the oil temp & presure markings  fuel flow and EGT.



Thanks

Michael

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_________________
RV-10 builder (flying)
#511

dave.saylor.aircrafters(a
Guest

Posted: Thu Feb 07, 2013 3:35 pm Post subject: Instrument markings

That all looks about right.  I ended up going with the book numbers at

first and then tweaking a few things here and there to make it more

livable.



You're gonna see something higher than 22 GPH on takeoff, you might

want to red line that closer to 26-27.  That way it won't sound a

nuisance alarm.



Dave Saylor

831-750-0284 CL

On Thu, Feb 7, 2013 at 2:59 PM, Mike Whisky <rv-10(at)wellenzohn.net> wrote:

 	  Quote: 	
		   



 Hi everyone,



 I attached a picture with my planned instrument markings (EFIS/EM settings) to ask if you could please verify. I have an TMX-IO540 (IO-450 D4A5) engine and extracted all information I could from the Lycoming Operator's Manual.



 Could you please help to verify especially the oil temp & presure markings  fuel flow and EGT.



 Thanks

 Michael



 --------

 RV-10 builder (interior &amp; finishing)

 #511





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=393822#393822





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robin(at)PaintTheWeb.com
Guest

Posted: Thu Feb 07, 2013 3:44 pm Post subject: Instrument markings

Michael,

I am not sure I would be cut & dry on my EGT's. I prefer a warning in the 1400's, say 1,450 enter Yellow Arc? Same goes for the low end of EGT. I like to be warned (yellow) when I am under 1100 for example. 

Re: Oil Temp it's not unusual to see 210 and still be in normal operating range. Maybe 209 Green, 210-245 Yellow?

As far as your Engine RPM I go FWF on takeoff and then when I can make the runway I pull back prop to 2,500 and continue to climb out. If I'm at 2503 or 2497 I don't adjust. Not sure I would want Yellow warning at 2,500. I know a few people that fly 25/2500 exclusively (yikes). 

On fuel flow you will spend a lot of time at 1.7 to 2.3 gph when taxiing. With your set up expect to see red a lot on your FF. Same goes for decent. I can get under 8 GPH on my decent for arrival. I personally would probably prefer seeing Yellow so you keep RED as Prohibited range.

Obviously these are all your call.



Robin



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Bob Turner

Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA

Posted: Thu Feb 07, 2013 4:30 pm Post subject: Re: Instrument markings

1. Already mentioned, sea level full power takeoff fuel flow should be close to 26 gal/hr, certainly not less than 24.

2. Lycoming says 500 F CHT redline, but nearly everyone agrees that's too high.

3. Absolute EGT means little. It will vary with probe placement, etc.

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_________________
Bob Turner
RV-10 QB

Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Thu Feb 07, 2013 4:45 pm Post subject: Instrument markings

If one wanted to set an upper limit on EGT, I would select about 1550 to 

avoid nuisance alarms.

I have probes 1.5" below flange on my Mooney 200 hp IO-360, and only see 

above 1500 if something is wrong, like a plug not firing.

You can determine fuel flow as part of test program. I find 9.5 gph/100 

hp is about right. Turbo charged and turbo normalized need more, but we 

aren't supposedly using that hardware on our 10s. If take off EGT shows 

around 1200-1250 on takeoff, fuel flow is fine.



On 2/7/2013 5:30 PM, Bob Turner wrote:

 	  Quote: 	
		   



 1. Already mentioned, sea level full power takeoff fuel flow should be close to 26 gal/hr, certainly not less than 24.

 2. Lycoming says 500 F CHT redline, but nearly everyone agrees that's too high.

 3. Absolute EGT means little. It will vary with probe placement, etc.



 --------

 Bob Turner

 RV-10 QB





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=393825#393825






	


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Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

partner14

Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas

Posted: Thu Feb 07, 2013 5:06 pm Post subject: Instrument markings

GPH:  change the 8 to 7.

Oil Temp:  yellow 205-225    red > 225

Oil Pressure:  Green 55-99  yellow 100-115  red > 115



Just my 3 cents.



Don McDonald



--- On Thu, 2/7/13, Mike Whisky <rv-10(at)wellenzohn.net> wrote:



From: Mike Whisky <rv-10(at)wellenzohn.net>

Subject: Instrument markings

To: rv10-list(at)matronics.com

Date: Thursday, February 7, 2013, 4:59 PM






Hi everyone,



I attached a picture with my planned instrument markings (EFIS/EM settings) to ask if you could please verify. I have an TMX-IO540 (IO-450 D4A5) engine and extracted all information I could from the Lycoming Operator's Manual

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_________________
Don A. McDonald
40636

bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Thu Feb 07, 2013 5:07 pm Post subject: Re: Instrument markings

My cht redline starts at 400 F.

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Bill
WA0SYV
Aviation Partners, LLC

rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Thu Feb 07, 2013 6:51 pm Post subject: Re: Instrument markings

With all of this good info these gentlemen posted above, you will be close. After your first flight readjust things so that your caution ranges are closer to your actual normal indications. Take a pic at 5000' when all is stabilized. For me, I want to be warned of low fuel pres less than 20 psi; low oil pressure less than 65 psi; high cht above 380F; and the most important for me was high fuel flow set at 26.5 gph. If you get a fuel leak that you can't see or smell and you energize the boost pump due to rough running engine, you will want to get on the ground in a hurry if FF exceeds that number. Bill and I installed a cowl outlet temperature limit switch as extra warning. Mine is set to open at 200F which deenergizes a relay bringing on my LED.



I have MP going from 10-30". RPM max 2750. EGT max 1550F. 



Please get one person to put a wrench on every single fuel, oil and flight control connection. Apply or reapply torque stripe. Fill oil cooler and prime your oil system. Disconnect fuel line at servo inlet, turn boost pump on and ensure you have at least 40 gph fuel flow from both tanks. 



Good luck and enjoy. I wish I had the money to build this at 20 instead of 40 years old.

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