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  #71  
Old 01-30-2018, 11:50 AM
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Originally Posted by N941WR View Post
That might be because "level flight" is nose down and the EFIS is so calibrated.
Likely true with some AHRS but the Dynon AD-AHRS must be mounted within 1 degree of all three aircraft axes. (Page 5-9 of the install manual).
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RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
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  #72  
Old 01-30-2018, 12:46 PM
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Originally Posted by rvbuilder2002 View Post
The two worst turbulence events I have had in my flying career (both while flying RV's at high speed cruise and bad enough to cause major head impact on the canopy even with very tight belts) were surely encounters with wake turbulence, since the air had been glassy smooth for the previous 1/2 hr and it was for the half hour after the event.
....Actually now that you said this, it reminded me of one we experienced in one of our RV-9As, going through the Banning pass in So Cal. It was violent enough to break the canopy, and the back of it lifted up, loosing our headsets and some baggage out the opening. My G-Meter was pegged at +6 & -4.2 and must say this was the hardest hit I have ever had. When my head hit the top it almost knocked me out, causing me to loose control and 3,500 ft of altitude prior to regaining control. This took the fun out of flying for a time but the plane survived it remarkably well. A testament to how good these little planes are. ...
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  #73  
Old 01-30-2018, 03:07 PM
tomww tomww is offline
 
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Quote:
Originally Posted by grubbat View Post
...... then I woke up. 😁

In reality, ive never hit clear-air non-forecasted severe turbulence before but it?s one thing that does keep me up at night. Those are the times you are glad you are operating with lots of margins. By the way, the -9 is better. 😂
The 9 may be better at some things. The amount of margin is not one of them. Not this post, but some of the posts in this thread seem to ignore reality and are trying to operate very near the edge.


Hope the man who over stressed his 9 to 6G had it checked by a competent engineer.
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  #74  
Old 01-30-2018, 04:36 PM
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Originally Posted by tomww View Post
The 9 may be better at some things. The amount of margin is not one of them. Not this post, but some of the posts in this thread seem to ignore reality and are trying to operate very near the edge.


Hope the man who over stressed his 9 to 6G had it checked by a competent engineer.

...Yes!
That would be me. Thanks, Allan..
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  #75  
Old 01-31-2018, 06:28 AM
170 driver 170 driver is offline
 
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The RV9 may not be the fastest model but I did outrun a M20C Mooney with 180 hp retractable gear and a cs prop with my fixed gear 150 hp and a fp prop, one person in each plane.
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  #76  
Old 01-31-2018, 06:42 AM
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Quote:
Originally Posted by Raymo View Post
Likely true with some AHRS but the Dynon AD-AHRS must be mounted within 1 degree of all three aircraft axes. (Page 5-9 of the install manual).
And then you can adjust it. Same as a steam gauge.
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  #77  
Old 01-31-2018, 07:40 AM
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Quote:
Originally Posted by N941WR View Post
And then you can adjust it. Same as a steam gauge.
If, by "adjust it", you mean modifying the AD-AHRS mount, that would be true. There is no adjustment otherwise. Why someone would want or need to adjust this in an EFIS is the question in my mind.
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RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
All lines by TSFlightLines (aka Hoser)

Last edited by Raymo : 01-31-2018 at 08:25 AM.
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  #78  
Old 01-31-2018, 07:50 AM
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Question for those that hit the canopy, do you have a 4 or 5 point harness, and how close were you to the canopy, almost 14 mod?
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  #79  
Old 01-31-2018, 09:39 AM
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Quote:
Originally Posted by bret View Post
Question for those that hit the canopy, do you have a 4 or 5 point harness, and how close were you to the canopy, almost 14 mod?
....When we had our experience, we only had four points, I ordered five points the very next day! I now absolutely refuse to let anyone in my airplane unfasten their belts, in flight in my RV after this incident. Had one or both of us not been fastened in, we no doubt would have been ejected for sure. The seat mod does provide about three more inches of head room, but in the case of violent turbulence, I really don't believe it would make much difference. The reason is, the attach points for the shoulder harnesses and seat belts, are really designed for a crash or forward impact, and not to help hold you down. Its not improper design, but more a case of the using the strongest points for attachment available. There is a way to remedy this, and if there is an adequate amount of interest from others, we can create a kit that will address, and eliminate the issue. If this is of interest to you, please send send a PM so we know and can look at it more. Thanks, Allan..
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  #80  
Old 01-31-2018, 09:47 AM
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N941WR N941WR is offline
 
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Quote:
Originally Posted by Raymo View Post
If, by "adjust it", you mean modifying the AD-AHRS mount, that would be true. There is no adjustment otherwise. Why someone would want or need to adjust this in an EFIS is the question in my mind.
It helps if you read the manual:

Quote:
Originally Posted by Dynon SkyView Manual
How to Enter the In Flight Setup Menu
When airspeed is greater than zero or groundspeed is greater than 15 knots, simultaneously pressing and holding buttons 7 and 8 when on the Main Menu will open the In Flight Setup Menu. This menu gives users access to SkyView system tools which may be useful during flight such as the Flight Angle Pitch Adjust Page and the Angle of Attack Calibration Wizard.
You may also access the Setup Menu from the In Flight Setup Menu by using the ENTER FULL SCREEN SETUP MENU? option.
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RV-9 (Yes, it's a dragon tail)
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www.repucci.com/bill/baf.html
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