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  #31  
Old 12-25-2010, 03:09 AM
RV10inOz's Avatar
RV10inOz RV10inOz is offline
 
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Location: Brisbane Qld. Aust.
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At 3000' he becomes a "Rock Drill"
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  #32  
Old 12-26-2010, 01:22 AM
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Janekom Janekom is offline
 
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Location: South Africa
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Some feedback:
Take-off is nothing but spectacular specially now when flying on my own.
The control harmony is good, but all controls are heavier compared to the two seater RV's which is normal.
Like all bigger AC you need to use the elevator trim a l lot. I found that I have to trim fully back and even then the elevator gets very heavy in the flare.
I have experimented by using 15 degrees (half) flap on landing and it gets much easier then. Obviously this will change a lot when one flies with pax and luggage. At this stage I am approaching at about 75 kts and the landing and ground roll is so short that I can easily get off the runway at Brits at the halfway mark.

At this stage there is also a slight tendency to roll left. Re-adjusting the one gear fairing as well as a small temporary trim on the rudder fixed most of it. Needs further fine tuning as I go along.

SPEED - I reckon that a good economical cruise will be about 165 kts at a fuel burn of about 11.0 US gal per hour. I am seeing a TAS of over 170 kts most of the time and that is at lowish altitudes.

Analyzing the downloaded engine data also shows that cyl 1 and 2 are constantly running hotter than the rest and it is now time to start trimming the small baffle plates in front of the cylinders. Oil consumption is down to very little and all temps and pressures are looking good! The decision to go for the carbon fiber plenum was good.

The next phase of my test flying will be stalls and calibrating the Dynon AOA, best rate of climb speeds, best glide speeds, as well as a climb test.
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Jan Hanekom
South Africa
Approved Person nr 325
http://www.rvbits.com
RV10 - ZU-XOX - (Flying)
RV7A - ZU-JRV - (Flying)
RV10 - ZU-JVR - (Written off)
RV7 - ZU-LOL - (Flying)
RV10 - ZU-RVI - (Flying)
RV7A - ZU-MER (Bought back)
RV7A - ZU-JAD (Sold Flying)
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  #33  
Old 12-26-2010, 05:04 AM
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pierre smith pierre smith is offline
 
Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
Default The big difference between this airplane and the two-seaters....

....will really become apparent when you climb to around 8,000'

Mine gains an incredible amount of TAS up high...much more so than my -6 and it's not unusual to see 176 Kts with the two-bladed blended airfoil prop, also much faster than anything else. I was advised by an aeronautical engineer to try 9000-10,000', where that airfoil will really love it.

WOT yielded 211 MPH or 183 kts at 800 ASL, according to the Dynon, during last Spring's Race to Ridgeland...145 miles in 45 minutes or so. I never came close to those numbers in my 180 horse -6A.

Have fun,
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Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga

It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132


Dues gladly paid!
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  #34  
Old 12-30-2010, 10:02 PM
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Thanks Pierre,
Looking forward to the high altitude stuff.

Did some stall testing and also set up the AOA at the time.
In summary - I think it is really difficult to stall the 10 by accident. You really have to abuse it to introduce a proper stall. The same with trying to get it into an incipient spin.
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Jan Hanekom
South Africa
Approved Person nr 325
http://www.rvbits.com
RV10 - ZU-XOX - (Flying)
RV7A - ZU-JRV - (Flying)
RV10 - ZU-JVR - (Written off)
RV7 - ZU-LOL - (Flying)
RV10 - ZU-RVI - (Flying)
RV7A - ZU-MER (Bought back)
RV7A - ZU-JAD (Sold Flying)
Dues paid for 2020 WITH A SMILE
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  #35  
Old 01-06-2011, 10:16 AM
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I have also modified my towbar in order to tow it by car to the fuel bay - cannot pull this beast on my own.
The handle part is removable and then I just add the extension with the tow hitch. Works like a charm!

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Jan Hanekom
South Africa
Approved Person nr 325
http://www.rvbits.com
RV10 - ZU-XOX - (Flying)
RV7A - ZU-JRV - (Flying)
RV10 - ZU-JVR - (Written off)
RV7 - ZU-LOL - (Flying)
RV10 - ZU-RVI - (Flying)
RV7A - ZU-MER (Bought back)
RV7A - ZU-JAD (Sold Flying)
Dues paid for 2020 WITH A SMILE

Last edited by Janekom : 01-06-2011 at 10:22 AM.
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  #36  
Old 01-29-2011, 10:56 PM
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Janekom Janekom is offline
 
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Location: South Africa
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Default Did a climb test

Yesterday we have worked hard again replacing the now painted wing root fairings and what goes with it.
Calibrated the left tank as we have replaced the sender unit.
Also trimmed the baffle plates in front of cyl 1 and 2 and a number of other small jobs.

Then............. we decided to do a climb test. We did not do it at MAUW (not allowed to carry pax at this stage) but mainly to determine e few things.
1) Can we climb at full tilt on a hot day to FL whatever without having to step climb
2) Test all systems like ignition, fuel, etc at altitude because it can go wrong up there with the thinner air

Below is a picture still on our way up at FL164



Here is a picture of the EMS. See how close the EGT's and CHT's are. Then notice that we still had 16 inch of MAP.
The bigger oil cooler also did it's job as we never had to step climb. The 222 in this picture is the highest we have seen.
We have only varied the climb speed very slightly starting at a TAS of about 125 and ended with a TAS of about 95 kts.
And obviously I had to throw a lot of avgas into it's throat to keep it cool. Initially about 75 LPH and about 50 LPH at the top.



Oxygen and all!



The view from up there!



More RV grins after the flight.



The verdict - mission accomplished and NO problems!
ATC spoiled our fun at 17600 ft and could not accomodate us further up.
At that stage we still had a climb rate of 500 ft/min !
The average rate of climb from 5000 to 17600 ft was about 600 ft/min.
We had a data logger with us and I will prepare and post a graph later on.
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Jan Hanekom
South Africa
Approved Person nr 325
http://www.rvbits.com
RV10 - ZU-XOX - (Flying)
RV7A - ZU-JRV - (Flying)
RV10 - ZU-JVR - (Written off)
RV7 - ZU-LOL - (Flying)
RV10 - ZU-RVI - (Flying)
RV7A - ZU-MER (Bought back)
RV7A - ZU-JAD (Sold Flying)
Dues paid for 2020 WITH A SMILE
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  #37  
Old 01-30-2011, 05:30 AM
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pierre smith pierre smith is offline
 
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Location: Louisville, Ga
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Default Outstanding, Jan.

Did you by any chance try and see what kind of cruise speeds you get at 75% at around 10,000'? What was your OAT when the oil was at 222?

Best,
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Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga

It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132


Dues gladly paid!
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  #38  
Old 01-30-2011, 07:13 AM
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Janekom Janekom is offline
 
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Posts: 840
Default No time to test the speed

Hi Pierre,
As it was a climb test where we did not want to step climb or stop climbing and the fact that there were some big Mamas ( Charlie Bravos ) close to base, we did not do that.

What I can tell you is that the AOT was sitting at +1 degrees Celsius. As it was a very hot day with lots of weather developments, the DA was 19700ft at our 17500ft on 1013mb.

The moment we leveled out, the oil temp came back to about 185.

I will try to cruise testing later on. File a flight plan the works.
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Jan Hanekom
South Africa
Approved Person nr 325
http://www.rvbits.com
RV10 - ZU-XOX - (Flying)
RV7A - ZU-JRV - (Flying)
RV10 - ZU-JVR - (Written off)
RV7 - ZU-LOL - (Flying)
RV10 - ZU-RVI - (Flying)
RV7A - ZU-MER (Bought back)
RV7A - ZU-JAD (Sold Flying)
Dues paid for 2020 WITH A SMILE
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  #39  
Old 01-30-2011, 05:21 PM
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RV10inOz RV10inOz is offline
 
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Location: Brisbane Qld. Aust.
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Try to keep your CHT's under 400F.

Those little baffle plates in front of 1&2 have been reduced and then the No.1 removed from our -10 as they seem to serv no useful purpose. Our CHT's are all more even now.
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  #40  
Old 02-13-2011, 02:09 AM
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Janekom Janekom is offline
 
Join Date: Jan 2006
Location: South Africa
Posts: 840
Default WHAT A WEEK!

What a week :!: :!:
Tuesday :- Worked hard to finish all the tasks to do with the inspection. By about 16h00 our AP, Joos Cloete arrived and gave it a clean bill of health.
Thank you Joos!!

Thursday:- Arrived at 06h00 in the morning at CAA's offices where Piet Fourie did the necessary in a flash. Thank you Piet!!
Left CAA before 07h00 with the ATF (Initial Authority to Fly) in my hands!

Saturday:- Took my wife for her first flight. So officially she is pax nr:1. Chris also went with to Coves where RVI will live soon.


Then took my kids and grand children for their first ride.


Just a nice pic afterwards with some typical thunder storms in the background.
__________________
Jan Hanekom
South Africa
Approved Person nr 325
http://www.rvbits.com
RV10 - ZU-XOX - (Flying)
RV7A - ZU-JRV - (Flying)
RV10 - ZU-JVR - (Written off)
RV7 - ZU-LOL - (Flying)
RV10 - ZU-RVI - (Flying)
RV7A - ZU-MER (Bought back)
RV7A - ZU-JAD (Sold Flying)
Dues paid for 2020 WITH A SMILE
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