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  #1  
Old 06-26-2017, 08:01 PM
M McGraw's Avatar
M McGraw M McGraw is offline
 
Join Date: Dec 2012
Location: Greenback, TN
Posts: 425
Default N829MS - SDSEFI system flys

Yesterday I took to the air for a first flight. It runs smooth and stable. I now have 4.5 hours on it. I will add the gear fairings in the next few weeks. My wife took takeoff and landing videos.


First takeoff. https://youtu.be/zg9WrSeh3sA
First Landing. https://youtu.be/2kz161vYcy8
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RV-14. #140039 Complete
Flight hours: 250+
2018 Dues Paid

Last edited by M McGraw : 06-28-2017 at 05:50 AM.
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  #2  
Old 06-26-2017, 08:14 PM
Chkaharyer99 Chkaharyer99 is offline
 
Join Date: Oct 2011
Location: Pilot Hill, CA
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Congratulations Marvin. Its beautiful.
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  #3  
Old 06-26-2017, 08:15 PM
Aircraft Specialty Aircraft Specialty is offline
 
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Location: Oconomowoc, WI
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Congrats again Marvin!!!! Beautiful plane
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  #4  
Old 06-26-2017, 08:24 PM
DAP DAP is offline
 
Join Date: Mar 2017
Location: Chandler AZ
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SWEET!

Nice work
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  #5  
Old 06-27-2017, 12:26 AM
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rv6ejguy rv6ejguy is offline
 
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Location: Calgary, Canada
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Congrats Marvin. Very clean build. You don't waste any time piling on the hours!
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 426.1 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm


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  #6  
Old 06-27-2017, 12:49 AM
control control is offline
 
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Location: Stockholm, Sweden
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Looks great! Please upload the videos to youtube and then share the links
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  #7  
Old 05-06-2018, 11:07 AM
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jetmech jetmech is offline
 
Join Date: May 2007
Location: Fairfield, CA
Posts: 98
Default 1st flight

Yesterday I took to the air for a first flight.

Congrats Sir great job and the fun is just starting!
looking forward to seeing the EFII map you post
Lee
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  #8  
Old 05-06-2018, 12:42 PM
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rv6ejguy rv6ejguy is offline
 
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Location: Calgary, Canada
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Be aware that most of the modern SDS setups are using different injectors with different flow rates in different placements and orientation from the rebranded setups. Fuel maps will not be comparable as a result.

Ignition maps won't be comparable either unless on the same engine, CR and fuel (and be sure to verify actual ignition timing and Magnet position). Some builders have found actual ignition timing has been advanced 1-3 degrees when checked from the pre-set values.
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 426.1 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm


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  #9  
Old 07-31-2018, 11:34 AM
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M McGraw M McGraw is offline
 
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Location: Greenback, TN
Posts: 425
Default Update at 175 hours

I have been testing variable timing for quite some time. It appears my aircraft does best at about 9500PA (11,500DA), 65%PWR173KTAS@11.2gph. Below is a comparison of our return trip from Air Venture 2018. I cannot identify a speed advantage of 125ROP over 100ROP. The screenshot below is at 100ROP at 20BTDC. I have tested ROP timing and found that 23BTDC is optimal; however, the speed increase was not worth the unknown detonation margin for me.


This second screenshot is three minutes later at approximately 30LOP and 27BTDC, 64%PWR169KTAS@9.2gph. The LOP curve proved very very flat. I tested significantly more advance than 27BTDC, but again my tolerance level for running a $40,000+ engine is conservative. When I go LOP I loose about 10kts; however, advancing the timing recovers a significant portion of that loss while saving 2 or more gallons per hour. The leaner the mixture more advance is required. This is simply a snapshot in time. I have gone as far as 175LOP with the engine running smooth at incredible fuel flows; however, the speed was not so incredible.


There is a post from approximately 2 years ago by a Vans pilot (Scott M.) who got 169KTAS at 8.8gph with fixed magnetos. I pay a penalty for increased weight and drag of larger landing gear. My future plan is to compensate with a cowl flap. With CHTs in the low 300s there is ample cooling drag margin to gain what I suspect will be ~5Kts or 0.5gph.
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RV-14. #140039 Complete
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Last edited by M McGraw : 07-31-2018 at 11:55 AM.
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  #10  
Old 07-31-2018, 11:56 AM
Tom Martin Tom Martin is offline
 
Join Date: Jan 2005
Location: Ontario, Canada
Posts: 1,423
Default

Here is the RV14 using stock mags last fall on my way to Arizona.

I have been a long time user of one electronic ignition/ one mag, on my previous planes but went with mags for simplicity on the RV14. Both systems have advantages but the numbers on this comparison look pretty similar to the posted images above. The engine is the stock Van's supplied IO390.



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EVO F1 Rocket 1000 hours,
2010 SARL Rocket 100 race, average speed of 238.6 knots/274.6mph
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RV14 Tail dragger

Fairlea Field
St.Thomas, Ontario Canada, CYQS
fairleafield@gmail.com
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