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  #11  
Old 07-15-2020, 10:08 AM
rcsilvmac rcsilvmac is offline
 
Join Date: Sep 2019
Location: NorCal
Posts: 35
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I installed the Stolspeed VG kit on my RV-6A. Reduced stall speeds from 52 mph to 49 mph power off, and power on went down to 47 mph. I feel the plane is safer to fly. I haven't noticed any reduction in top speed, but my RV is very basic with O320 and wood FP prop. They look a little funny, but for me it was well worth the small ($100) investment and time to install. There is a great review on the STOLspeed site from another RV-6 owner. I followed his installation instructions.
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  #12  
Old 07-16-2020, 07:36 AM
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Snowflake Snowflake is offline
 
Join Date: Oct 2009
Location: Victoria, BC, Canada
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Quote:
Originally Posted by sblack View Post
If you put vgs on a tailwheel airplane and they work, then the airplane will stall at a higher aoa. I expect for most rvs that will mean hitting the tailwheel first.
Add to that the fact that the -6 will hit the tail first already, even with full flaps, if you're landing in 3-point and hit the stall buzzer just before you touch down. The last thing i'd want is to be able to increase the AOA at this point. When I have three wheels on the ground I want it to stop flying ASAP.

(and on top of that it would be next to impossible to maintain the polished wing with VG's on it...)
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1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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  #13  
Old 07-19-2020, 04:39 AM
mikeholl mikeholl is offline
 
Join Date: Oct 2017
Location: Temora, NSW, Australia
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I've often landed tailwheel first , but not in a RV. When the tailwheel touches down the AOA reduces immediately so there is no tendency to bounce.
If my tailwheel touches first I feel I've done a good landing!
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Mike
RV-6 in process
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  #14  
Old 07-19-2020, 10:19 AM
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Snowflake Snowflake is offline
 
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Quote:
Originally Posted by mikeholl View Post
I've often landed tailwheel first , but not in a RV. When the tailwheel touches down the AOA reduces immediately so there is no tendency to bounce.
Check back once you've actually tried it in your -6.

Note also that there are a number of -6's out there with visible wrinkles in the skins between the last two fuselage bulkheads from too many tailwheel first hard landings because they're trying to stall it onto the runway.
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1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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  #15  
Old 07-21-2020, 12:25 PM
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PerfTech PerfTech is offline
 
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Location: Redlands, Ca.
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.... We installed a set on a customers RV-9A and did a bit of testing to see the changes
if any we could detect. The stall speed went down a couple of miles an hour at the very
most. This particular aircraft model has such a low stall speed, the gains if any were
almost undetectable. Its top speed dropped three miles per hour, and the customer said
that was unacceptable for him, as he had gone to great lengths, and considerable expense,
to up the efficiency and speed of his airplane. He also said when cleaning and washing his
aircraft, it was akin to bathing a mad porcupine. He came back and ask us to de-horn
his plane, and return it to its prior condition. This process caused a bit of paint damage
that he, needless to say wasn't very happy about.
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AntiSplatAero.com
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  #16  
Old 07-21-2020, 03:45 PM
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plehrke plehrke is offline
 
Join Date: Sep 2006
Location: Defiance, MO
Posts: 1,674
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Quote:
Originally Posted by PerfTech View Post
.... We installed a set on a customers RV-9A and did a bit of testing to see the changes
if any we could detect. The stall speed went down a couple of miles an hour at the very
most. This particular aircraft model has such a low stall speed, the gains if any were
almost undetectable. Its top speed dropped three miles per hour, and the customer said
that was unacceptable for him, as he had gone to great lengths, and considerable expense,
to up the efficiency and speed of his airplane. He also said when cleaning and washing his
aircraft, it was akin to bathing a mad porcupine. He came back and ask us to de-horn
his plane, and return it to its prior condition. This process caused a bit of paint damage
that he, needless to say wasn't very happy about.
No need to fix something that ain’t broke!
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RV-6A - 14+ years, 950+ hours
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Paid dues yearly since 2007
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  #17  
Old 07-23-2020, 03:38 PM
UrbanM UrbanM is offline
 
Join Date: May 2019
Location: Salt Lake
Posts: 20
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Thanks for all the responses! The goal was never to increase the AOA at touch down. I my buddy's case he noticed the wool tufts near the wing root were being blown backwards in the flare and thought it would be interesting to see if this airflow could be improved. I've flown a few factory and kit types that have benefited from VGs both with performance and or handling but proper placement is key.
I have to laugh about the cleaning difficulties. This is why I am looking at the plastic VGs so I don't get cut to bad if I run up against one. Anyone who has waxed a glider can vouch for being careful around turbulator tape and the blow holes (I just run a bead of tape over them till I'm done)
Thanks again!
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