[NSRCA-discussion] Flying stab travel

[Scott McNickle]

Scott, my experience with flying stabs has been with gliders and an Old Timer (a V-Tail Swallow) rather than a Pattern application, but I've been surprised at how much throw it takes.
Can't quote degrees, but in every case the trailing edge needs to go up about the same distance, in inches, as a conventional elevator would.
For example, if the needed elevator throw was 1/2", then the trailing edge of the stab would need to move 1/2" for the same effect.
Looks like a lot, but seems to work.

Scott McNickle


> On September 26, 2019 at 12:29 PM 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!
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