Re: Question for John Kagan

From: <joshuawfinn_at_gmail.com>
Date: Wed, 30 Jan 2013 20:51:12 -0000

>
> I haven't figured it out what is making the difference in those two models yet, but I think it is going to come down to the normal, basic stuff: surface alignment, drag, prop efficiency, rubber energy, etc.
>

One of the few similarities I notice between the two models is that their similar area distribution. Both achieve significant effective wing taper through their chosen method, and both have large stabs.

There is a similarity of propellers, too, but what gets me is that Treger is able to fly at such a low prop pitch and only 2 degrees differential between wing and stab. I have a prop with a similar pitch distribution and minimum pitch, and let's just say that even on a reasonably stiff model, I still have to use half again more incidence just to keep things stable.

Good flying,
Joshua Finn
Received on Wed Jan 30 2013 - 12:51:14 CET