control throw for full-flying stab?
 

Hello-

This may seem like an odd request, but I'm trying to set up an EDF jet with a full-flying stab and I need a general idea where to start with the control throw. I've seen some pattern aircraft with full-flying stabs, so I thought I'd try to get some input in this forum.

I've never had a model with a full-flying stab before, so I don't know if they generally need more control throw than a conventional stabilizer/elevator tail, or less?

The airframe's a Starmax 60mm F-14 with a 44" wingspan (when wings are fully open).

Thanks in advance for any info you can provide-

RE: control throw for full-flying stab?
 

I haven't had a pattern plane with a full flying stab, but I had sail planes with them years ago. As I remember the flying stab was much more effective than elevatore so less control throw was needed. I think this is true with pattern planes too.

RE: control throw for full-flying stab?
 

I Tony, I remember reading somewhere that a good rule of thumb was if you had 25mm elevator deflection measured at the trailing edge for a "normal"stab, then to set up your fully flying stab with the same amount of deflection measured at the trailing edge.

I can't remember where I read it and it might have been complete hogwash, but it stuck in my head for some reason.

Pattern planes with fully flying stabs are like hens teeth, but the glider folk tend to have more experience with them. My RES glider has a fully flying stab.

RE: control throw for full-flying stab?
 

Did you have to statically balance the flying stab?