[NSRCA-discussion] Aero design question

[Bev Cowell]

leave discussion
----- Original Message ----- 
From: "Dean Pappas" <d.pappas at kodeos.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Saturday, September 02, 2006 1:57 PM
Subject: Re: [NSRCA-discussion] Aero design question


> Hi Gang,
> The excellent axial rolling charecteristic of some designs is due to a lot 
> more than where the inboard end of the ailerons end. Nonetheless, all of 
> my designs used ailerons that ended far from the fuse! The only downside 
> is that having a bit of aileron in front of the stab offers a useful 
> trimming tool: trailing the ailerons up or down will change the effective 
> stab incidence, and this was a powerful adjustment tool back when we 
> didn't have plug-in adjustable "everything".
>
> You note Akiba's well trimmed airplanes. There is some smart design going 
> on there!
>
> later,
>           Dean
>
>
>
> -----Original Message----- 
> From: nsrca-discussion-bounces at lists.nsrca.org on behalf of John Ferrell
> Sent: Sat 9/2/2006 7:48 AM
> To: NSRCA Mailing List
> Cc:
> Subject: Re: [NSRCA-discussion] Aero design question
>
>
>
> I have spent a fair amount of time considering this situation. I have 
> concluded there is no reason to take the risk of adding unnecessary 
> turbulence to the empennage.
>
> In gentle maneuvering it probably has little effect. In aggressive 
> maneuvering (think snaps) it likely leads to inconsistent behavior. 
> Inboard ailerons may contribute additional available force in 3D maneuvers 
> (hanging on prop?).
>
> Other related considerations are aileron shape and the hinging geometry. I 
> also suspect fat fuselages reduce these effects by dispersing the 
> turbulence over a greater volume of air.
>
> Just my two cents worth!
>
> John Ferrell    W8CCW
> "My Competition is not my enemy"
> http://DixieNC.US
>
>
> ----- Original Message ----- 
> From: Peter Pennisi <mailto:pentagon.systems at bigpond.com>
> To: 'NSRCA Mailing List' <mailto:nsrca-discussion at lists.nsrca.org>
> Sent: Friday, September 01, 2006 8:35 PM
> Subject: [NSRCA-discussion] Aero design question
>
>
>
>
> My current model has ailerons which extend a fair way towards the fuselage 
> (Comp-ARF IMPACT) What effect does the turbulence coming off the aileron 
> have on the tail plane. I am currently building another IMPACT (IMHO flies 
> extremely well) which I am considering to reduce their size by cutting and 
> fixing the inboard part to the wing in an attempt to clean up the airflow 
> over the tail plane during rolling maneuvers .  The model does roll well 
> but it could be better.
>
>
>
> Am I barking up the wrong tree – any thoughts!
>
>
>
> Peter
>
>
>  _____
>
>
>
>
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