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  #31  
Old 05-29-2014, 06:48 AM
Whitman Whitman is offline
 
Join Date: Oct 2010
Location: Allentown PA
Posts: 254
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In that accident investigation link, they cited an aerobatic gross weight restriction as well as a tighter CG range. My POH doesn't specify the different aft CG restriction but has the same 67.36 aft limit. Is this something you guys have?

In the article, the CG limit is 1660mm (65.35 inches) as the aerobatic CG and 1711mm (67.36 inches) for normal ops.

https://www.atsb.gov.au/media/24397/...701033_001.pdf

The tighter CG range makes sense I guess but this is the first I've seen. I'm an RV neophyte with just over a 100hrs so hoping you guys know. After reading the report though, it's clear that this plane was over gross (even normal ops) and outside of the normal CG range as well.

Last edited by Whitman : 05-31-2014 at 02:41 AM.
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  #32  
Old 06-05-2014, 03:25 PM
Ofitz Ofitz is offline
 
Join Date: Aug 2013
Location: Merritt Island, Florida
Posts: 26
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One of the replies mentioned snap rolls.....

How many of you do snaps in the -4?? Anyone ever ask Van's if the tail is designed for that? Aerobatic certification G limits are about the vertical axis as far as I know. Side loads and twisting loads induced from the entry can be pretty strong on the tail and motor mounts.

I'm pretty sure that is why the metal prop on an S-2B is now life limited - they finally did some calculations and testing on loads induced through snaps and gyro maneuvers.....
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  #33  
Old 06-05-2014, 03:33 PM
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Mel Mel is offline
 
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Location: Dallas area
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If I remember correctly Van has always said, "No snap-rolls or tail-slides."
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EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
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RV-6 Flying since 1993 (sold)
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  #34  
Old 06-05-2014, 04:21 PM
sandifer sandifer is offline
 
Join Date: Jan 2007
Location: NC
Posts: 664
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Quote:
Originally Posted by Ofitz View Post
One of the replies mentioned snap rolls.....

How many of you do snaps in the -4?? Anyone ever ask Van's if the tail is designed for that? Aerobatic certification G limits are about the vertical axis as far as I know. Side loads and twisting loads induced from the entry can be pretty strong on the tail and motor mounts.

I'm pretty sure that is why the metal prop on an S-2B is now life limited - they finally did some calculations and testing on loads induced through snaps and gyro maneuvers.....
If I still had an RV, I would limit snaps to very low speed as in snaps on top of a loop (Avalanche). Those are fun. These are sub-100mph snaps. Should not hurt the airplane. Van has written about entry speeds and characteristics of snaps in RVs, so he has done them. If Vans makes a general recommendation against snaps, that is probably a good one, since it's a maneuver for which pilots can put undue stress on the airplane if their airspeed is too high, or technique rough/incorrect. Snaps seem to be a very misunderstood maneuver for pilots who have not studied or had quality training on them. This translates to very rough technique and poor results.
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  #35  
Old 06-05-2014, 08:10 PM
Vac Vac is offline
 
Join Date: Jul 2009
Location: Niceville, Florida
Posts: 434
Default Maneuvering Flight

There is a fairly extensive discussion of maneuvering flight as applies to RV's in Part 3 of the transition training syllabus beginning on page 279 of draft 1.7. A link is posted in the safety section. G-available vs g-allowable, symmetric vs asymmetric control application and computing maneuvering speeds are discussed.

In an effort to improve the draft, I would appreciate any feedback or critique in the discussion on the safety thread.

Fly safe,

Vac
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RV-4 2112
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  #36  
Old 06-06-2014, 06:27 AM
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Dave Taylor Dave Taylor is offline
 
Join Date: Jan 2005
Posts: 176
Default Warner Robins

Quote:
Originally Posted by FLY6584 View Post
Great discussion here... thank you for the feedback. I am torn between the -4 or the -3 right now.

My wife is moving down to Florida this year to go back to school and we live in Georgia so I'm looking for cheap and fast transportation down there every weekend.
Hey Dan,
I see you are in Warner Robins as well. Not sure if you have looked up any local RV guys but I'd be glad to introduce you to several. Is it safe to assume you fly JSTARS? If you get a chance look me up and give me a call or PM me. I'm in the global. Always good to meet a fellow RVer
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RV-7 N207DT
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"The greatest mistake you can make in life is to be continually fearing you will make one. "
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  #37  
Old 06-12-2014, 09:18 AM
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Saville Saville is offline
 
Join Date: May 2014
Location: KBVY Massachusetts
Posts: 1,100
Default Hammerheads

Can one safely do hammerheads with a -4? This includes bailing out of a failed hammerhead by cornering the controls.

No passenger...


thanks

Last edited by Saville : 06-12-2014 at 12:18 PM.
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  #38  
Old 06-12-2014, 12:10 PM
Sid Lambert Sid Lambert is offline
 
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Location: North Atlanta
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Not with a passenger. If you were to enter a spin you'd likely not get out if you had someone of average size in the back.
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  #39  
Old 06-12-2014, 12:19 PM
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Saville Saville is offline
 
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Quote:
Originally Posted by Sid Lambert View Post
Not with a passenger. If you were to enter a spin you'd likely not get out if you had someone of average size in the back.
What about without a passenger?

My understanding is only to do acro when solo. No pax.
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  #40  
Old 06-12-2014, 12:20 PM
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Saville Saville is offline
 
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Quote:
Originally Posted by Sid Lambert View Post
Not with a passenger. If you were to enter a spin you'd likely not get out if you had someone of average size in the back.
What about without a passenger?

My understanding is only to do acro when solo. No passengers.
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