This is an interesting subject. It seems in the olden days most
everyone used positive wing incidence relative to the motor stick but
I figured if the motor stick was parallel to the line of flight it
was just pure drag. My thought was if the motor stick flew at the
same angle as the wing it would function as a lifting body and
contribute something in return for it's drag. So I've been flying
with wings parallel to motor sticks for 40 years now and still think
it's the way to go.--- In Indoor_Construction_at_yahoogroups.com,
<RLBailey_at_...> wrote:
>
> Tapio
>
> Models such as F1D and F1L generally fly better with the wing and
thrustlline parallel to within about a degree. It seems that
downthrust is bad for efficiency. The effect of extra fuselage drag
is more than offset by the efficiency increase from removing the
downthrust, thereby allowing the tail to carry more of the aircraft
weight.
>
> Bob
>
> ----- Original Message -----
> From: Tapio Linkosalo
> To: Indoor_Construction_at_yahoogroups.com
> Sent: Wednesday, December 12, 2007 1:11 PM
> Subject: Re: [Indoor_Construction] F1D CG poll
>
>
>
> On Tue, 11 Dec 2007, Timothy Chang wrote:
>
> > It seems the common trend is often to leave the wing close to 0
degrees.
> > 1 or 2 degrees at most, and then to have considerably more
angle in the
> > tailplane. My F1D models like flying with around .45" of
incidence in
> > the tailplane.
>
> What is the difference between putting the (positive) incidence
to the
> wing, or (negative) to the tailplane? I assume that with the same
decalage
> the model will attain the same wing incidence relatice to the
flight path,
> so for a model with 0 in the wing and negative on tail, the flight
> attitude will be more "tail down", which translates into needing
more
> downthrust on the prop, and hanging tail will mean slightly more
vertical
> clearance between wing and tail, while the fuselage will produce
more drag
> being mode inclined to the incoming flow? Is there something that
I miss?
>
> -Tapio-
>
>
>
>
> [Non-text portions of this message have been removed]
>
Received on Thu Dec 13 2007 - 14:15:16 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:45 CET