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  #1  
Old 11-22-2015, 02:32 PM
cmgolden cmgolden is offline
 
Join Date: Apr 2014
Location: Wichita, KS
Posts: 7
Default RV-10 Service Ceiling

I went flying this morning on a cold and beautiful day over Wichita. I headed Northwest and climbed to check the airplane's service ceiling. 40 minutes later I still wasn't quite to the ceiling, but I think I got pretty close.

Cutting to the chase: I flew to 23,000 feet and still had a bit more to go. I could have gone another 1,000 feet without trouble. And I achieved my personal best ground speed coming back: 255 knots.

Details:
On departure I climbed at about 115 kts doing 1,300 feet per minute.
By 7,000, that rate declined to about 1,200 fpm.
At 10,000 feet, I was climbing at 900 fpm at 115 KIAS.
At 16,700 feet, I climbed at 500 fpm (slowing airspeed to 110 KIAS)
At 19,400 feet, I saw 400 fpm (at 95 KIAS)
At 23,000 feet, I was still doing about 200 fpm (95 KIAS)

I had already asked for higher than my original flight plan (FL220) and the controller sounded like he had someone at 24,000 that would pose a conflict if I continued, so I ended my climb at FL230.

When I turned around and began my descent, I benefited from the 77 knot tailwind at that altitude and I achieved my personal record 255 knot ground speed.

Overall, it was an interesting flight.
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RV-10 w/EFII
Wichita, KS

Last edited by cmgolden : 11-22-2015 at 09:22 PM. Reason: Added screenshot
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  #2  
Old 11-22-2015, 02:54 PM
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Jesse Jesse is online now
 
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Location: X35 - Ocala, FL
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I wonder if the EFII system had an effect on the performance and being able to get up that high. I assume you were lightweight, but the highest we have been is almost FL220.
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  #3  
Old 11-22-2015, 03:03 PM
BobTurner BobTurner is offline
 
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Location: Livermore, CA
Posts: 4,590
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Two big variables are weight (sounds like you were solo) and temperature (density altitude). You mentioned that it was cold.
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  #4  
Old 11-22-2015, 04:23 PM
cmgolden cmgolden is offline
 
Join Date: Apr 2014
Location: Wichita, KS
Posts: 7
Default Light

Indeed I was solo. Outside air temp at FL230 was -24C (which is a bit warmer than standard, I think). I had about 40 gallons at altitude. Density altitude was not quite FL240.
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RV-10 w/EFII
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Last edited by cmgolden : 11-22-2015 at 09:26 PM. Reason: Added DA
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  #5  
Old 11-23-2015, 05:59 AM
bruceflys bruceflys is offline
 
Join Date: Aug 2014
Location: Ocala, FL (Leeward Air Ranch)
Posts: 89
Default

Excellent data, thanks. How did you obtain and post such a clear screenshot of the Dynon display?
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  #6  
Old 11-23-2015, 06:04 AM
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Jesse Jesse is online now
 
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There is a keystroke to capture a screenshot from the screen itself. Very useful for this type of thing. I can't remember the keystroke, but it can be done.

Edit: Ensure a USB memory stick is inserted into one of the USB ports and press and hold the #2 and #7 keys.
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Jesse Saint (Saint Aviation, Inc. - VAF Advertiser)
352-427-0285
jesse@saintaviation.com
RV Hotel (hangar, room, car) at X35 in north FL

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Dynamic Prop Balancing, Prebuy Inspections, Condition Inspections, Repairs and Mods, Injector Tuning, Airframe, Engine, Panel Upgrades, Ferrying, etc.
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  #7  
Old 11-23-2015, 03:53 PM
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RV10inOz RV10inOz is offline
 
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Location: Brisbane Qld. Aust.
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Interesting flight.

My typical load would be more than that by about 330lbs and at that I have found FL170 is about the limit of "practical" in terms of time to climb, efficiency of the flight etc.

Most of the time FL150 is my maximum.
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  #8  
Old 11-23-2015, 05:52 PM
BobTurner BobTurner is offline
 
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I'll bet density altitude is routinely on the high side?
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  #9  
Old 11-24-2015, 08:38 PM
JDanno JDanno is offline
 
Join Date: Apr 2008
Location: Tennessee
Posts: 440
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Can you tell us what kind of hoops (FAA or others) you had to go that high? Any special training? Had to use a pressure O2 mask? Etc. thanks!
Pretty cool feat of daring!
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  #10  
Old 11-24-2015, 08:49 PM
BobTurner BobTurner is offline
 
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Location: Livermore, CA
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Just the obvious things, I think:
IFR rating and ifr clearance
oxygen via mask (canulas limited to 18000') but no pressure mask needed.
(you need a pressure mask when ambient pressure, 100% O2 is not enough. Since sea level O2 partial pressure is about 20% of one atmosphere, you have to go up to where the air pressure is 0.2 atmosphere - like FL400 or so - before you need a pressure mask.)
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