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  #11  
Old 01-03-2021, 04:27 PM
JackZ JackZ is offline
 
Join Date: Nov 2015
Location: neustadt ontario
Posts: 134
Default

The spar is the same on the 7 and 9 except for its length. Torque a bolt with a stubby wrench some day and then do it with the longer wrench. You will soon see that you can exert far more torque with the longer wrench. Itís the same with the wing. Any lift created at the end of the 9 wing exerts far more twisting action than the shorter wing of the 7.

The 9 wing is designed for efficient climb and higher altitude cruise speed. I love mine for cross country. I will maybe try to get some aerobatic training in my next plane Rans s21. Itís rated at 6 g. A very experienced pilot, whom I trust implicitly regarding aero, told me to get aerobatic training in a far less slippery airframe than a vans rv.Iím taking his advice.
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  #12  
Old 01-03-2021, 04:38 PM
ChrisHodgens ChrisHodgens is offline
 
Join Date: Aug 2020
Location: Roanoke, Texas
Posts: 43
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Quote:
Originally Posted by JackZ View Post
The spar is the same on the 7 and 9 except for its length. Torque a bolt with a stubby wrench some day and then do it with the longer wrench. You will soon see that you can exert far more torque with the longer wrench. Itís the same with the wing. Any lift created at the end of the 9 wing exerts far more twisting action than the shorter wing of the 7.

The 9 wing is designed for efficient climb and higher altitude cruise speed. I love mine for cross country. I will maybe try to get some aerobatic training in my next plane Rans s21. Itís rated at 6 g. A very experienced pilot, whom I trust implicitly regarding aero, told me to get aerobatic training in a far less slippery airframe than a vans rv.Iím taking his advice.
That is sound advice!!!
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  #13  
Old 01-03-2021, 07:23 PM
ty1295 ty1295 is offline
 
Join Date: Aug 2011
Location: Jeffersonville, IN
Posts: 426
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Quote:
Originally Posted by JackZ View Post
The spar is the same on the 7 and 9 except for its length. Torque a bolt with a stubby wrench some day and then do it with the longer wrench. You will soon see that you can exert far more torque with the longer wrench. Itís the same with the wing. Any lift created at the end of the 9 wing exerts far more twisting action than the shorter wing of the 7.

The 9 wing is designed for efficient climb and higher altitude cruise speed. I love mine for cross country. I will maybe try to get some aerobatic training in my next plane Rans s21. Itís rated at 6 g. A very experienced pilot, whom I trust implicitly regarding aero, told me to get aerobatic training in a far less slippery airframe than a vans rv.Iím taking his advice.
So with that said, just arm chair thinking I wonder if someone could do a clipped wing 9. HMMMM...
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RV9A First Flight 9/30/19
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  #14  
Old 01-03-2021, 07:29 PM
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scard scard is offline
 
Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 3,197
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Quote:
Originally Posted by ty1295 View Post
So with that said, just arm chair thinking I wonder if someone could do a clipped wing 9. HMMMM...
Sure! It has been done. It is called a -7 with a different horizontal stab. .
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  #15  
Old 01-03-2021, 08:28 PM
ty1295 ty1295 is offline
 
Join Date: Aug 2011
Location: Jeffersonville, IN
Posts: 426
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Quote:
Originally Posted by scard View Post
Sure! It has been done. It is called a -7 with a different horizontal stab. .
And wing airfoil.
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RV9A First Flight 9/30/19
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  #16  
Old 01-04-2021, 01:50 AM
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grubbat grubbat is offline
 
Join Date: May 2012
Location: Ga
Posts: 676
Default Wing tips

You could remove the big wingtips and put end plates on and save some wingspan but anything more would be extensive because the flaps and ailerons would have to be shortened. The wingtips have some efficiencies built in with those outer tips moving the wing vortexes away so you may end up with no net gain. Who knows.

Quote:
Originally Posted by ty1295 View Post
So with that said, just arm chair thinking I wonder if someone could do a clipped wing 9. HMMMM...
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RV-3 Sold
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  #17  
Old 01-04-2021, 10:40 AM
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Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 3,036
Default no aerobatics

like others I've been temped to do aerobatics in the 9 but so far I have resisted. no rolls or loops. I hope I can continue to resist. if the 9 had been designed for aerobatics I would do them but since it was not I don't. simple as that.
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Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 800+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com

Last edited by Steve Melton : 01-04-2021 at 10:47 PM.
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  #18  
Old 01-04-2021, 10:58 AM
jjbardell jjbardell is offline
 
Join Date: Jan 2017
Location: Phoenix, AZ
Posts: 227
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Just to throw a log on the fire.

The 9 cannot do advanced aerobatics, but you can roll just about anything...RV9A or a Boeing 707 if you stay at 1G. The plane doesn't know up from down as long as you maintain that 1G. The 9A has a better roll rate than a lot of airplanes which are rated for aerobatics.

Just sayin'...

3.2.1...begin flaming.

https://photos.app.goo.gl/h8feirnUvasoByGB9

https://photos.app.goo.gl/SvYPfa72QEboQR9J8
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Building - Zenith 750 [11323] CruzerDuty27.5
N67LJ RV9-A [90504] - SOLD
N83LJ Sonex [0864] - SOLD

https://rvpilotlife.wordpress.com/blog/home/

Last edited by jjbardell : 01-04-2021 at 11:01 AM.
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  #19  
Old 01-04-2021, 11:09 AM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 3,036
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Quote:
Originally Posted by jjbardell View Post
Just to throw a log on the fire.

The 9 cannot do advanced aerobatics, but you can roll just about anything...RV9A or a Boeing 707 if you stay at 1G. The plane doesn't know up from down as long as you maintain that 1G. The 9A has a better roll rate than a lot of airplanes which are rated for aerobatics.

Just sayin'...

3.2.1...begin flaming.

https://photos.app.goo.gl/h8feirnUvasoByGB9

https://photos.app.goo.gl/SvYPfa72QEboQR9J8
I fully expected this.
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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 800+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
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  #20  
Old 01-04-2021, 01:01 PM
Mel's Avatar
Mel Mel is online now
 
Join Date: Mar 2005
Location: Dallas area
Posts: 10,916
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If I had an RV-9 and I wanted to do acro, I would certainly put it on a video for my Insurance company to see. It would probably help with my rates to show how good I fly.
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Mel Asberry, DAR since the last century. Over 1,000 certifications accomplished.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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