[NSRCA-discussion] Flying stab travel

Thu Sep 26 09:46:31 AKDT 2019

The actual throw should be these numbers,
High.   15 to 17 deg
Med.    8 to 14 deg
Low.     5 to 8 deg.

You have to remeber that is way more effective than a elevator.

The size of the stab is the same as a elevator and the cord also.

Matt Griffitt
ADGaero.com
334.380.8228

On Thu, Sep 26, 2019, 12:37 PM Scott McHarg via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> Thank you all for responding.  Matt or Richard, can y'all give me maybe an
> "ish" idea of the chord at the root of the stab and a span or, even better,
> sq. in. of the stabs?  The numbers so far seem to be what I was expecting.
> I was planning on having them set 3 rates.  Maybe one at 20 deg., one at 15
> deg. and one at 10 deg.  I was wondering if it'd be about the same as the
> throw on an elevator.  Thanks again!
>
> Scott
>
> *Scott A. McHarg*
>
> Takeoff is optional.  Landing is mandatory!
>
>
> On Thu, Sep 26, 2019 at 12:32 PM Matt Griffitt via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org> wrote:
>
>> A flying stab is more effected than a elevator.  Travel will be 60, or
>> 70%.of a elevators travel.
>> I have been flying a flying stab for the last 8 years . On all of BJ
>> Craft's planes the total amount of travel is 2.25 inches at the frount stab
>> tube.
>> I hope this helps.
>>
>>
>>
>> Matt Griffitt
>> ADGaero.com
>> 334.380.8228
>>
>> On Thu, Sep 26, 2019, 12:11 PM Richard B. Strickland via NSRCA-discussion
>> <nsrca-discussion at lists.nsrca.org> wrote:
>>
>>> I agree on a pattern airplane (I have two BiSides with flying
>>> stabs—anybody want one?) as you have the advantage of forced airflow over
>>> the stab, but on an F4 twin 70 EDF, I run out of elevator on low rate at
>>> around 20 with flaps and slats on landing.  Maybe run 10-13 on low, but
>>> have some significant reserve on high, like 25+ and maybe 14-22 mid range
>>> for maneuvering speeds. Sounds like a fun project!
>>>
>>>
>>>
>>> Richard Strickland
>>>
>>>
>>>
>>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
>>> Windows 10
>>>
>>>
>>> ------------------------------
>>> *From:* NSRCA-discussion <nsrca-discussion-bounces at lists.nsrca.org> on
>>> behalf of John Decker via NSRCA-discussion <
>>> nsrca-discussion at lists.nsrca.org>
>>> *Sent:* Thursday, September 26, 2019 11:49:19 AM
>>> *To:* General pattern discussion <nsrca-discussion at lists.nsrca.org>;
>>> Scott McHarg <scmcharg at gmail.com>
>>> *Subject:* Re: [NSRCA-discussion] Flying stab travel
>>>
>>> Scott,
>>>
>>> Normally, I set elevators at 10 degrees to 12 degrees for maiden. When I
>>> had a Nuance with a full flying stab it was so responsive I had it dialed
>>> down to 8 degrees by the time I had it trimmed out. And I found the radii
>>> could get sharp pretty fast so I had about 20% more expo programmed as
>>> well. Definitely more surface area makes a big difference. The nice thing
>>> is that once initial incidence is set, you adjust using elevator trim
>>> rather than incidence adjusters.
>>>
>>> Hope that helps,
>>>
>>> John
>>>
>>> On Thursday, September 26, 2019, 11:29:40 AM CDT, Scott McHarg via
>>> NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:
>>>
>>>
>>> Howdy,
>>>
>>> I'm looking for a little advice on a full flying stab.  I'm teaching an
>>> Aerospace Senior Capstone Design class at Texas A&M and one of my students'
>>> teams is scratch building a plane based on a supersonic business jet in
>>> sub-scale utilizing an EDF.  That part isn't really part of the equation
>>> but wanted you to understand what they're doing.
>>>
>>> The team has figured out the design and mechanical connections which I
>>> have approved but we are needing an idea of how much travel the stab
>>> needs.  I understand that there are many variables including size of the
>>> stab, CG, AC, etc. but I'm looking to give them a place to start.  I was
>>> thinking of the Bi-Side and wondering if someone could give me, in degrees,
>>> the amount of travel for the stab so that we have a starting point.  I'm
>>> sure I'll have fun with the maiden but, hopefully, we will be in the
>>> ballpark.
>>>
>>> Thanks!
>>> Scott
>>>
>>> *Scott A. McHarg*
>>>
>>> Takeoff is optional.  Landing is mandatory!
>>> _______________________________________________
>>> NSRCA-discussion mailing list
>>> NSRCA-discussion at lists.nsrca.org
>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>> <https://eur04.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.nsrca.org%2Fmailman%2Flistinfo%2Fnsrca-discussion&data=02%7C01%7C%7Cbadc9348e7da4f1e165c08d742a1a46f%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637051134321969516&sdata=RwuEl%2FWvSfLgL6Rx4Kvg74jwKrnTVto5FuKNZcGqi%2Fk%3D&reserved=0>
>>> _______________________________________________
>>> NSRCA-discussion mailing list
>>> NSRCA-discussion at lists.nsrca.org
>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>
>> _______________________________________________
>> NSRCA-discussion mailing list
>> NSRCA-discussion at lists.nsrca.org
>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20190926/9bf602ae/attachment.html>