Reverse av/RCU poll

Mon Jan 10 12:17:01 AKST 2005

Todd,

The ARF thing is certainly a buyer be ware.  I always get a queasy feeling
when I don't know how it was put together.  That dead engine scenario can be
painted in about any down line event of a schedule.  Most likely in a spin
to inverted like in advance.   I have practiced the rev. avalanche many
times myself and don't think it is any harder on my plane then the 45 down
snap other then it is a power hungry maneuver to finish.    Perhaps guys are
entering the maneuver with some (maybe too much) speed to keep the energy up
and its creating issues and or the wing tube is not set properly in a load
carrying rib that reaches to the leading edge.   I have seen some  FAI snaps
at what I though were wing tube shattering speeds that were much faster then
the rev avalanche.

Maybe some of the FAI guys could chime in here.

Looking forward to moving up.......next year :-).

WG

----- Original Message ----- 
From: "Todd Schmidt" <tschmidt at classicnet.net>
To: <discussion at nsrca.org>
Sent: Monday, January 10, 2005 1:05 PM
Subject: Re: Reverse av/RCU poll

> Okay, we can build em stronger, but what about the guys who fly ARF's?
Are
> the manufacturers going to change the way they construct their product?
>
> I know there is a lot of what if's, but what if an engine craps right
after
> the snap, we'll be low and stalled, at least very slow. This could be
> another contributing factor to loosing a plane.
>
> Todd Schmidt
> ----- Original Message -----
> From: "Nat Penton" <natpenton at centurytel.net>
> To: <discussion at nsrca.org>
> Sent: Monday, January 10, 2005 12:08 PM
> Subject: Re: Reverse av/RCU poll
>
>
> > Ok all you masters fliers, quit complaining and take your medicine. Your
> > problems with the reverse avalanche are imaginary. Manuever schedules
have
> > always been designed to bring about enhancement of the pilots and the
> > airframes capabilities.
> >
> > It is not difficult to build an airframe that you cannot tear up. The
> > wingtube, for its weight, provides the most strength and rigidity of any
> > structural component. Why would you cut it off ??
> > ----- Original Message -----
> > From: "David Flynt" <dflynt at verizon.net>
> > To: <discussion at nsrca.org>
> > Sent: Monday, January 10, 2005 12:35 AM
> > Subject: Reverse av/RCU poll
> >
> >
> > >I posted the following response on the RCU poll:
> > >
> > > When I voted against replacing the maneuver on this poll, I was split
> > > myself.  On the one hand, the maneuver is challenging and fun, but on
> the
> > > other hand I can sense that I may be over-stressing my plane.  I also
> just
> > > do not know whether people are not flying it correctly, or whether
some
> > > planes are not built well, or whether this is really such a demanding
> > > maneuver that everybody's airplane is at risk.  When I placed my vote,
> one
> > > thought broke the tie in my mind -- 1) If it is safe for FAI, then it
is
> > > safe for Masters.
> > >
> > > So let's talk about that.  Is it really safe for FAI?  (The assumption
> > > here
> > > is that pattern planes for FAI and Masters are not built any
> differently).
> > > From reading the NSRCA mail list, I know of that Eric Henderson
damaged
> > > two
> > > of his planes flying this maneuver.  I have spoken to another FAI
pilot,
> > > and
> > > he is nervous about the maneuver if not flown very slowly, which is
> > > difficult if your plane does not slow down well.  That could be the
case
> > > if
> > > you have a heavy plane with a two stroke for example.  But I am
> beginning
> > > to
> > > feel that this maneuver is potentially and perhaps absolutely damaging
> to
> > > all plug-in wing designs.  I have flown it about 50 times with my
> Partner,
> > > and I cannot detect any damage.  But that does not mean that I can
> > > practice
> > > the maneuver another 1000 times and not incur damage.
> > >
> > > After reading about what others have to say, and direct discussion, I
> > > suspect that this maneuver is damaging to most if not all plug-in wing
> > > models.  I offer this as speculation, but there is already enough
> evidence
> > > to support the theory, and we are just getting started.  I am claiming
> > > that
> > > the reverse avalanche is a more damaging maneuver than the snap on a
45
> > > down, and that it is unacceptably rough on our airplanes.  If anybody
> has
> > > data for or against my claim, please speak up.  This is pretty
important
> > > stuff.  I am just as concerned about my competitor's airplanes as I am
> my
> > > own.
> > >
> > > Oh one last thing, I change my vote on this poll, which means that it
is
> > > exactly tied right now -- 24 to 24.  The next question is, if more
> people
> > > start changing their mind like I have, is there any way possible to
> > > replace
> > > this maneuver?  Maybe we will just have to cope with it like the FAI
> guys
> > > must.
> > >
> > > Sincerely,
> > >
> > > David Flynt
> > >
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> > >
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