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ACRO E-mail Archive Thread: RVs and Aerobatics

Thread: RVs and Aerobatics

Message: RVs and Aerobatics

Follow-Up To: ACRO Email list (for List Members only)

From: Robert Busick <rbusick at nmsu.edu>

Date: Thu, 21 Dec 1995 15:55:01 UTC

Message:

  On Wed, 20 Dec 1995, Eric Rood wrote:

> 
> RV's and aerobatics... I haven't check the Red Book for specific numbers,
> but I seem to recall something in the magazine several years ago about
> RV's being banned from IAC competition.  One fellow up in NE Canada had
> built an RV-3 with full span ailerons for competion.  It was on the cover
> of one of the magazines, as I recall, painted purple of all colors.  
> Several crashes due to spar failures led to this decision to keep the RV's
> out of contests.
> 
	Note true.  Only the RV-3 has been banned by the IAC from 
competition.  I don't think that ban includeds the RV-3A.  I have seen 
Dick VanGrusen, owner and designer of Vans Aircraft, do a very good 
aerobactic airshow demo in his RV-4.  The RVs can do aerobatics and 
numerous RV-4s have been flow up thru intermediate.  Rvs are not 
unlimited aerobactic A/C and are only designed for +- 6Gs.  The RVs are a 
good compromise between sport/cross country/mild aerobatics, but it is 
not an unlimited machine.  

	Reference spar failures on the RV-3, my 
research indicates that the failure was not the spar, but the rear spar 
attach point incorrectly located and attached, and the failure happened 
above the designed flight loads, sometimes in a high G rolling pullout.

	For more info on RVs join the RV list at:  rv-list at matronics.com. 

Bob Busick
RV-6 Builder

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