Re: [RCSE] Re: The perfect platform or Not....

2005-02-09 Thread Daryl Perkins
<>

I agree. I just purchased a Sharon for use at this
upcoming TS. I have one of HKM's Space Pro F3B models
also. Anyway, as the Sharon was leaning against the
wall, as models will do, I noticed some distinct
similarities... so I brought out the tip panel from my
Space Pro (RG15 full span)... and plugged it right
into the Sharon's center panel. 

Tooling is so time consuming and expensive on our
molded toys, and they have come up with a way to mix
and match parts that seems to work.

As far as why the Sharon works? I agree, it's just too
wierd, but it does work extremely well. Planform is
good, section combination = weird. But then of
course... there's all that span, span, and more
span. hmm. ;-)

D




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[RCSE] Re: The perfect platform or Not....

2005-02-09 Thread F3X

John Erickson Wrote: 
> Thomas,
> 
> I'm still trying to figure out how the Sharon 3.7 does it.  The
> Sharon's
> flew beautifully this last weekend in Phoenix.  Great plane for the
> "mid"
> winds and thermal cycles they had at the contest.
> 
> The Sharon has a 7037 at the root, transitioning to a RG-15 at the
> tips.
> Seems totally backwards; more camber at the root than at the tips. 
> This is
> aerodynamic washin unless there is some twist in the molding process.
> 
> JE
> --
> Erickson Architects
> John R. Erickson, AIA
> 


On the Sharon the transition to the RG is about 12" of span from the
root. What they had was a fuse with a 7037 a wing saddle in hand and
modified the lower section of an RG15 wing to fit it.  I really don't
think it was for aerodynamic reasons.

Tom

Tom.


-- 
F3X



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