[NSRCA-discussion] F17 barrel roll

[Gorden Seeling]

were ru getting the p 17 & f 17 power point from??? thanks gordy.

On Sun, Aug 23, 2015 at 6:37 AM, Randy Forbus via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> *Barrel roll* - *Wikipedia*, the free encyclopedia
> <http://en.wikipedia.org/wiki/Barrel_roll>
>
>
> ------------------------------
> *From:* NSRCA-discussion <nsrca-discussion-bounces at lists.nsrca.org> on
> behalf of Ed Alt via NSRCA-discussion <nsrca-discussion at lists.nsrca.org>
> *Sent:* Sunday, August 23, 2015 12:35 PM
> *To:* NSRCA List
> *Subject:* Re: [NSRCA-discussion] F17 barrel roll
>
> I'm not sure , but after 100 years or so, it seems that the barrel roll
> may have a new definition.  This appears to require that the model skid
> around the entire rotation, which is not really how a barrel roll is
> typically done as far as I know.  I believe that you would normally do one
> mainly with simultaneous pitch and roll inputs, and maybe touches of rudder
> to keep that coordinated, in much the same  way as  a coordinated turn
> would be done in a full scale aircraft to keep the turn & bank indicator's
> ball centered. As a result, it would present itself as if the aircraft were
> traveling along the inside of a cylinder with both of it's main gear wheels
> always in contact with its inner surface, hence the name barrel roll.
> Executed this way, you could do that Bob Hoover demonstration of keeping a
> glass of some liquid perfectly still, resting on top of the instrument
> panel.
>
> This definition seems to be more of a variation on an integrated roll, and
> as a result you would expect to see the tail pointed at perhaps a 45 deg
> yaw angle at one point (when roll angle = 90 deg), and the nose yawed at
> you 45 deg at another (when roll angle = 180 deg).  And I think that as a
> result it would also mean that the wing tip in the direction of the roll
> would always be in contact with the inner surface of the imaginary
> cylinder, instead of both wheels.  Am I visualizing that correctly?  It
> seems like it would be tricky to judge accurately.
>
> Ed
>
> ------------------------------
> Date: Sat, 22 Aug 2015 23:10:49 -0700
> To: underdw at gmail.com; nsrca-discussion at lists.nsrca.org
> Subject: Re: [NSRCA-discussion] F17 barrel roll
> From: nsrca-discussion at lists.nsrca.org
>
> Hopefully this helps…
>
>
>
>
> From: NSRCA-discussion on behalf of NSRCA List
> Reply-To: Daniel Underkofler, NSRCA List
> Date: Saturday, August 22, 2015 at 6:21 PM
> To: NSRCA List
> Subject: [NSRCA-discussion] F17 barrel roll
>
> In F17 there is a cryptic aresti symbol that is described in the figure
> description as a barrel roll.  Will somebody please describe this in more
> detail and what control inputs will obtain the required result?
>
> Thanks, Dan
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