Re: Question for John Kagan

From: Leo Pilachowski <leop_at_lyradev.com>
Date: Wed, 30 Jan 2013 22:06:34 -0000

Josh,

How do you know the in flight numbers, such as the decalage and in flight prop pitch for Treger's and Schramm's 2012 WC planes? Are there plans for Treger's plane published other than the 2010 plane. Has a plan for a more recent (2012 perhaps) Schramm plane been published yet?

Leo

--- In Indoor_Construction_at_yahoogroups.com, joshuawfinn@... wrote:
>
> >
> > 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 - 14:06:39 CET