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Old 01-23-2018, 01:51 PM
SuperCubDriver SuperCubDriver is offline
Join Date: Feb 2011
Location: Germany
Posts: 290

I just installed strakes on my -8.
For my -8 tail shake during stalls is reduced. Stall speed is lower by 5-6 kts IAS with all flap settings. So this can reduce the numbers on T/O and landing distances for the POH because initial climb speed and Vref is reduced as well as ground roll.
RV-7 flying, IO-375 w. P-Mags, 200RV Prop

RV-8, IO-375, P-Mags, 74RV Prop, flight testing
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Old 01-23-2018, 02:32 PM
rvbuilder2002 rvbuilder2002 is offline
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,236

Originally Posted by mike newall View Post
Would love to see a Van's comment on these......

Scott ?

There was info published about this in the 2001, 4th edition of the RVator , and then a follow-up in the 2002 4th edition.

You can find it in the 27 years of the RVator starting on page 363.

In a nut shell, there was no evidence found to indicate that the use of strakes had any influence on stall speed. They did effect the pre-stall buffet by reducing it and making it not occur as much before the actual stall occurred (not beneficial in most peoples opinion).

What was confirmed is that flying without gear leg intersection fairings will negatively effect stall speed.
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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