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  #1  
Old 12-21-2018, 03:29 PM
jask jask is offline
 
Join Date: Feb 2018
Location: Ramona, CA
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Default If you were building a 7 again

What VS and rudder would you use? I do not plan on any intentional spins nor will I likely enter any unintentional spins. I will do some aerobatics and imo, the possibility of exceeding speed would be much more likely than entering a spin.
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  #2  
Old 12-21-2018, 04:25 PM
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pazmanyflyer pazmanyflyer is offline
 
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Quote:
Originally Posted by jask View Post
What VS and rudder would you use? I do not plan on any intentional spins nor will I likely enter any unintentional spins. I will do some aerobatics and imo, the possibility of exceeding speed would be much more likely than entering a spin.
Correct me if I'm wrong but isn't there only one VS and rudder design for the 7? I do know that 7 VS/rudders were/are used on 6's.
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Last edited by pazmanyflyer : 12-21-2018 at 04:29 PM.
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  #3  
Old 12-21-2018, 04:38 PM
jask jask is offline
 
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Location: Ramona, CA
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The early kits had an 8 rudder and vans shifted to shipping kits with the 9 rudder.
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  #4  
Old 12-21-2018, 04:57 PM
Maxrate Maxrate is offline
 
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Location: League city, TX
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I would not mess with major flight control changes without talking to the mother ship. If you ended up in an unintentional spin it might not end well.
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  #5  
Old 12-21-2018, 06:25 PM
jask jask is offline
 
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Location: Ramona, CA
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I don't think vans really cares which one you use. The early kits were given the option of the larger rudder. Not mandated. You should consider that multiple failures of the vs/rudder on the 7 have occurred with the 9 rudder that of course were fatal.
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  #6  
Old 12-21-2018, 07:06 PM
Aero_Octaveus Aero_Octaveus is offline
 
Join Date: Aug 2014
Location: Edmonton, AB
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I met a fellow who built a 6 (I think that's right) rudder and installed it on the 7. He seemed to like it as it had a less heavy feel on the pedals. However that being said, I do believe Vans designed the 7 rudder to be more safe to help with better spin recovery. So I personally recommend to stick with that. Safe flying benefits us all. That being said, He said it wasn't a big deal to change it out. Theoretically you could always build a second rudder and "Flight test" it.

As for the exceeding speed... Please read this accident report before you do anything. I always thought this report was a must read. http://www.bst-tsb.gc.ca/eng/rapport...8/a10o0018.asp
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Last edited by Aero_Octaveus : 12-21-2018 at 07:15 PM.
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  #7  
Old 12-21-2018, 07:13 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
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Vans documented this in a service bulletin, SB02-6-1.
https://www.vansaircraft.com/pdf/ser...s/sb02-6-1.pdf

There are other threads on the physical comparisons between the two options.
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  #8  
Old 12-21-2018, 07:21 PM
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schristo@mac.com schristo@mac.com is offline
 
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Location: WA
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Default stick with the kit unless you have a specific reason...

I have flown both extensively to the edges of the flight envelope... both work. I have posted previously on the differences. I prefer the -8 rudder but it is good to have some time with the -9 rudder first to gauge for yourself. Before paint, it only takes a day around 300 dollars to build an -8 rudder with attach hardware to swap out and fly. You also need a different VS cap. If I were to build another -7 it would be with a -8 rudder.
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Last edited by schristo@mac.com : 12-21-2018 at 07:35 PM.
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  #9  
Old 12-22-2018, 05:55 AM
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mike newall mike newall is offline
 
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Actually, I wouldn't build a 7....

Move on and build a 14
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  #10  
Old 12-22-2018, 09:44 AM
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Snowflake Snowflake is offline
 
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Quote:
Originally Posted by mike newall View Post
Actually, I wouldn't build a 7....

Move on and build a 14
Even better... Pick up an abandoned -6 kit and build that instead.
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