Video from INSIDE the cockpit - Subie sounds

cjensen · Post by **cjensen** » Sat May 19, 2007 11:19 am

My friend Benny Butler came up from Missouri this week so we could present the Eggenfellner H6 engine to our chapter on Thursday night. We had a GREAT turnout, and everybody enjoyed the presentation.

The next day, Benny took me out for a flight in his RV-7-

This time, I shot video from the INSIDE (just for you Scott!!). This is cool!!
The startup-
http://www.youtube.com/watch?v=HhWsTMOum0Q
The takeoff

-
http://www.youtube.com/watch?v=oM8IDN9StOI
The landing-you can really tell how quiet it is when I talk in this one
http://www.youtube.com/watch?v=faxKLSMSA-c
The shutdown-
http://www.youtube.com/watch?v=X7T_oOJzvXg
Here is the same airplane on takeoff last weekend at Rebel's Bluff from the outside-
http://www.youtube.com/watch?v=Et4ivK7le5I

dons · Post by **dons** » Sat May 19, 2007 3:19 pm

It does sound different. Bet you are all pumped up about the H6 now, not that you haven't been for the last little while

.

svanarts · Post by **svanarts** » Sat May 19, 2007 10:42 pm

Very interesting sound. My wife asked, "Are you watching a motorcycle?"

Hmmph. Women.

The plane looked like it was climbing pretty good when you were inside taping but his takeoff at Rebel's Bluff looked like the plane didn't want to climb that well.

It sure sounds smoother than a Lycoming. Thanks for posting these!

aerial · Post by **aerial** » Sat May 19, 2007 10:56 pm

Hey, was that the clutch he was pushing with his left foot on the startup?

Wicked Stick · Post by **Wicked Stick** » Sun May 20, 2007 7:21 am

Chad,

How long was that grass strip at Rebels Bluff ?
From the camera angle, it looks like there was a little pucker factor going on near the end of the runway having to angle left to avoid taller trees straight ahead.

cjensen · Post by **cjensen** » Sun May 20, 2007 10:19 am

I think the strip at Rebel's Bluff was 2000' give or take a hundred. It has pucker factor on both ends...trees and both ends have a dogleg approach to short final unless you come in REALLY steep.

As far as the climbout of Rebel's Bluff, Benny is not a show off, and he was climbing comfortably, not full potential.

When I shot the video's from inside, we sustained 1800fpm. I tried to get it on the video, but the readout is so small on the Dynon that when YouTube brings the quality down, it's impossible to see. He usually climbs out at 100mph at 1400fpm.

I flew it Friday morning and did a high speed pass at Jack Holland's house...saw 2500fpm in the zoom climb...

When he left Bloomington on Friday afternoon, it was 82 degrees, and one of our mechanics said "That thing is climbing out of here like a rocket!" Not really, it just sounds like it!

svanarts · Post by **svanarts** » Sun May 20, 2007 10:31 pm

Glad to hear it. I don't need stellar climb rates but I don't want the bird to climb like a dog. Looks like the Egg is still on the plate.

Was it as smooth as everyone says?

cjensen · Post by **cjensen** » Mon May 21, 2007 9:03 am

svanarts wrote:Was it as smooth as everyone says?

Resounding YES!!

Benny's is a little louder than the 9A I rode in, but Benny has zero for insulation. The 9A was FULLY insulated, and was SUPER quiet...and SMOOTH!

svanarts · Post by **svanarts** » Mon May 21, 2007 10:41 pm

Thanks Chad. You're not so much a weather vane any more, more like a Subaru Evangelist.

cnpeters · Post by **cnpeters** » Mon May 21, 2007 11:24 pm

Brother Chad,
In the videos, there was a whistling noise (I know the acoustics stink on the youtube videos). Was this the engine, or a canopy air leak?
Lastly, in your Book of Subarism, do you have any other RV gospel on performance in terms of fuel burn vs speed witht he H-6? Of course, there should be an improvement with the new redrive. My engine efficiency target is 186mph at no more than 8 gph.
Carl (an engine agnostic still)

cjensen · Post by **cjensen** » Tue May 22, 2007 9:08 am

svanarts wrote:Thanks Chad. You're not so much a weather vane any more, more like a Subaru Evangelist.

I should change my sig to "SE" rather than "WV"

cjensen · Post by **cjensen** » Tue May 22, 2007 9:21 am

cnpeters wrote:Brother Chad,
In the videos, there was a whistling noise (I know the acoustics stink on the youtube videos). Was this the engine, or a canopy air leak?
Lastly, in your Book of Subarism, do you have any other RV gospel on performance in terms of fuel burn vs speed witht he H-6? Of course, there should be an improvement with the new redrive. My engine efficiency target is 186mph at no more than 8 gph.
Carl (an engine agnostic still)

Dude! You guys are killin' me here!

Subaru Evangelist, Book of Subaruism...hilarious!

Anyway, I didn't notice the whistling noise at all when we were flying the airplane. When I played the video for the first time, I wondered the same thing. I *think* it was wind noise as Benny's canopy does fit a slight bit to the right side. The engine and redrive will make a slight whistle at certain power settings, but it's way more subtle than what you hear in the video.

As far as performance goes, the table (with the new redrive) on the performance page of the Egg website seems acurate when compared to what Benny is getting in his 7. The numbers for the 9 are different, but the table shows 190mph at 8.2gph and 183mph at 7.3gph (for a 7A), so 186 at 8 seems reasonable. Benny is getting 185mph at 7.2gph in his 7. I can't remember exactly what John said he was getting in his 9A in high speed cruise, but I do remember him saying 135KTS at 5gph, which is 155mph in economy cruise.

Here's a quote from Andy Parish from this morning on the Egg site...he just had the new redrive and exhaust put on his 7A-

Andy Parish wrote: Jan,
I had an uneventful trip back. The climb performance to 9000 was noticeably better. Cruise was maybe 2-3 knots faster for the same fuel flow but basically the same. I could, however run a lower prop rpm at 9000 than I was able to do on the way down due to the added engine rpm. You need to add power smoothly on takeoff since the need for rudder is noticeably greater. I'll send you a note tomorrow with my performance #s from the trip. Thanks for an enjoyable and educational day yesterday.

Andy

Hopefully we'll get the performance numbers from Andy's trip in the next day or two.

cnpeters · Post by **cnpeters** » Wed May 23, 2007 10:43 pm

I was looking at the Egg site, and now it seem they are only listing a very expensive list of Sensenich props for the H-6's and new redrive in the 3 and 4 blade variety. $3500 for a ground adjustable 3 blade?? What happened to the IVO's? Around $2300 was inclusive of electric variable pitch.

cjensen · Post by **cjensen** » Thu May 24, 2007 9:57 am

Well, it's sort of like Van's being a "dealer" for Lycoming engines. Eggefellner had this prop developed for them, and in doing so, they no longer offer the other prop options. That's not to say that you can't get one and put it on. In fact, I don't think Egg ever offered the IVO prop thru them. They did offer the Warp Drive, but not IVO. Benny's 7 has the IVO Magnum on it, and it performs beautifully. He will be switching to the new redrive soon, and will keep the same prop.

The blades are from Sensenich, and are VERY expensive to manufacture...the reason for the ground adjustable version being $3500.

RV7Factory · Post by **RV7Factory** » Thu May 24, 2007 5:28 pm

cjensen wrote:
svanarts wrote:Thanks Chad. You're not so much a weather vane any more, more like a Subaru Evangelist.
I should change my sig to "SE" rather than "WV"

As the one who christened you "WV" I am doing everything within my power to prevent this.

LOL!

Great videos, keep'em coming!

cjensen · Post by **cjensen** » Fri May 25, 2007 1:22 pm

Well, in honor of that, I'll keep "WV" in my official title.

I may add "SE" to the end though...

Post by **Spike** » Fri May 25, 2007 1:55 pm

We aren't going to change it.

RV7Factory · Post by **RV7Factory** » Fri May 25, 2007 1:57 pm

Spike wrote:We aren't going to change it.

ROTFLMAO!!!!

Chad, I do really like the new one Carl gave you... "Chadenfellner" That's priceless!

captain_john · Post by **captain_john** » Fri May 25, 2007 9:47 pm

"Chadenfellner"

I love it!

CJ

cjensen · Post by **cjensen** » Fri May 25, 2007 11:11 pm

Yeah, Carl came up with a great one! Chadenfellner is one of my favorite's as well.