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  #11  
Old 08-20-2018, 05:39 PM
Terrybrd Terrybrd is offline
 
Join Date: Nov 2011
Location: New Smyrna Beach, FL
Posts: 36
Thumbs up Great job

Looks like a good fit with that engine and everything.
I wish I had the money and put the bigger engine in.
I have the 260is and get about 87-90 kts cruise but at least I'm flying and only burning about 4.3 gallons an hour.

Now the fun starts and you get to show it off and say I BUILT IT !!!!

Terry
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  #12  
Old 08-20-2018, 07:58 PM
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rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 337
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Quote:
Originally Posted by Terrybrd View Post
Looks like a good fit with that engine and everything.
I wish I had the money and put the bigger engine in.
I have the 260is and get about 87-90 kts cruise but at least I'm flying and only burning about 4.3 gallons an hour.

Now the fun starts and you get to show it off and say I BUILT IT !!!!

Terry
It is exciting indeed, thanks Terry.

Iíll keep the group posted once I get a better data set.
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- RV10, N1530G (reserved). Empennage in progress.
- RV12, N975G, Flying
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  #13  
Old 08-20-2018, 08:30 PM
tboyett tboyett is offline
 
Join Date: May 2011
Location: Katy, TX
Posts: 39
Default Congrats Ron!

Hope it provides you many hours of pleasure.

Best to you,
Tom
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  #14  
Old 08-20-2018, 08:30 PM
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jcarne jcarne is offline
 
Join Date: Jul 2016
Location: Worland, Wyoming
Posts: 600
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Congrats and really great video!
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RV-7A Emp. done
Wings mostly done
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Finish kit on order
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  #15  
Old 08-21-2018, 01:53 PM
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scottmillhouse scottmillhouse is offline
 
Join Date: Apr 2007
Location: Madison, AL
Posts: 228
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87-90 knot cruise sounds like there is something wrong perhaps with prop pitch so you are not using available power. I spent a lot of time at 90 knots and 1900' for Oshkosh and surrounding lakes. You are way down on power output required for that speed. The Rotax is only at about 4725 rpm which is about 60 HP by curve. I economy cruise at 115 knots at 5350 usually at 3-4000' and am pitched so I can exceed 120 with rpms up.
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Got medical back, now building a 7A; N579RV reserved, new engine installed, doing FWF, instruments & finish painting.
RV-12 #120515, N319RV 1st flight 12/2015 now over 270 hours.
RV-9A, 536 hours sold, RV-7 sold, Kitfox sold
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  #16  
Old 08-21-2018, 03:46 PM
Vantastic12 Vantastic12 is offline
 
Join Date: Feb 2015
Location: Pagosa Springs Colorado
Posts: 10
Default First Flight RV-12

Congratulations Ron,

Are you running a Rotax 912ULS and reporting 2,400 engine RPM on takeoff? You should be getting at least 5,200 plus RPM on takeoff. The Rotax doesn't like low RPM in flight. It's rated at 5,800 RPM at sea level for five minutes, then 5,500 RPM before you get into the yellow band.

And, Rotax oil temps 210/214 is normal and a good range. I'm at 7,600' in Colorado and have to cover part of my oil cooler with various size partial covers available from Van's all year to maintain temperatures in the low 200's.

I had to re-pitch my prop slightly to get 5,000 RPM on takeoff here, but I still get 5,500 RPM in cruise and apx. 121 KTS true.

Best regards,

Vantastic 12
RV-12 80 hours in Phase 2






Quote:
Originally Posted by rongawer View Post
I am happy to say that my RV-12ís first flight was a successful one.

Having my wife on the ramp watching (and quite nervous about the whole thing), I simply made one trip around the patch to prove the controls work and the airframe worked well. Iím happy to say it performed very well, light on the controls and flew straight and level just touching the stick - and a pleasure all in.

My oil temp did get above 210 in flight settling at 214. This is frustrating as the oil cooler is stuck to the front cowl with a full opening. I can only imagine that itís somehow undersized. Iíve contacted Bill at Airflow and gave him my data and he is going work out a different cooler for me (side note: talk about customer service! I emailed him on a Sunday and he emailed me right back with advice and request for data.).

Note that I never got my revs above 2400 - the airplane accelerated and lifted off a lot faster than I thought it would and I didn't even get the throttle all the way in yet. That, and knowing that oil temps could run high, I just left it at partial throttle. I chuckled to myself in that going from my Baron to this is like going from a deep draft vessel to a jet ski - super responsive. I pulled it back to 2100 at right crosswind and left it there until pulling back for landing. I landed a little fast, but I had 12G18 30ļ off from the right and wanted to carry a little extra. Iím pretty happy with my first landing in an RV-12. I did not experience any roll or pitch issues with flap extension that Iíve read other folks experience, so thatís good too.

I already have a short list of tweaks going, but it was a good first run. Enjoy.

Startup and taxi:
https://youtu.be/dETfp5DYKt0

18 Minute flight video:
https://youtu.be/NjS8LDEWnPk
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  #17  
Old 08-24-2018, 07:16 PM
rongawer's Avatar
rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 337
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Quote:
Originally Posted by Vantastic12 View Post
Congratulations Ron,

Are you running a Rotax 912ULS and reporting 2,400 engine RPM on takeoff? You should be getting at least 5,200 plus RPM on takeoff. The Rotax doesn't like low RPM in flight. It's rated at 5,800 RPM at sea level for five minutes, then 5,500 RPM before you get into the yellow band.

And, Rotax oil temps 210/214 is normal and a good range. I'm at 7,600' in Colorado and have to cover part of my oil cooler with various size partial covers available from Van's all year to maintain temperatures in the low 200's.

I had to re-pitch my prop slightly to get 5,000 RPM on takeoff here, but I still get 5,500 RPM in cruise and apx. 121 KTS true.

Best regards,

Vantastic 12
RV-12 80 hours in Phase 2
Thanks for all the congrats guys.

Vantastic, my engine is a UL350iS from UL Power. I haven't posted a cruise speed yet, but it did climb out at 85KIAS ~1300-1500 fpm with no issue at ~2450rpm. Once I confirm full throttle straight and level RPM, targeting 2800, I may repitch the prop then.

I flew some today and am truly happy with this airplane - what a fun little bird. I plan to do a bunch of flying tomorrow and will post more once I have better data, but I will say it gets right out there and scoots along very well.
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- RV10, N1530G (reserved). Empennage in progress.
- RV12, N975G, Flying
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  #18  
Old 08-24-2018, 08:46 PM
ChuckC ChuckC is offline
 
Join Date: Apr 2011
Location: Meridian, ID
Posts: 64
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Ron,

Congratulations! Go have some fun!
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  #19  
Old 08-24-2018, 09:47 PM
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rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 337
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Quote:
Originally Posted by ChuckC View Post
Ron,

Congratulations! Go have some fun!
Thanks Chuck - hey, any relation to Thomas at Stanford?
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Ron Gawer

- RV10, N1530G (reserved). Empennage in progress.
- RV12, N975G, Flying
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