[NSRCA-discussion] YS Questions+more - Rolls

[shinden1 at cox.net]

remember George, that Ail deflection does just this 
it warps airflow it does not act as an air dam this is what we need to concentrate on 
Bryan
---- "george w. kennie" <geobet at gis.net> wrote: 
> A top hinged aileron will actually present a greater surface area to the airstream when deflected upward than downward producing induced differential which CAN be beneficial, relative to design force parameters.
> G.
> 
> 
> 
>   ----- Original Message -----
>   From: ronlock at comcast.net
>   To: NSRCA Mailing List
>   Sent: Thursday, March 06, 2008 8:20 AM
>   Subject: Re: [NSRCA-discussion] YS Questions+more - Rolls
> 
> 
>   And while your at it, I'd appreciate some discussion of the impact of the top hinge system as seen on Viavat, and Prestige birds -     (top hinged, with fairing that eliminates the gap at deflection)
> 
>   Thanks, Ron Lockhart
> 
>     -------------- Original message --------------
>     From: vicenterc at comcast.net
> 
>     Nat,
> 
>     Could you explain why the differential should be different for non-center hinged?  I understand that the mechanical configuration of non-center hinged requires differential to obtain same travel in both directions.  However, the travel up and down should be close to equal.
> 
>     Thanks,
> 
>     --
>     Vicente "Vince" Bortone
> 
>       -------------- Original message --------------
>       From: "Nat Penton" <natpenton at centurytel.net>
> 
>       Tom
>       It's just something that is peculiar to the Southern Hemisphere.
> 
>       Changing wing incidence will not help. Unless things are really screwed up <G>, at our roll rates, centrifugal forces are too low to cause a problem. You want zero differential, aero speaking ( same up/down if center hinged ).
> 
>       I find the best check is the fast half-roll in the vertical up.        Regards     Nat
>         ----- Original Message -----
>         From: Koenig, Tom
>         To: NSRCA Mailing List
>         Sent: Wednesday, March 05, 2008 7:24 PM
>         Subject: Re: [NSRCA-discussion] YS Questions+more
> 
> 
>         Hi Troy!
> 
>         Thanks for the info. I thought you would be toiling away on the next developmental stage of these engines!!
> 
>         Hopefully soon, I can find the time to get flying again. I am looking forward to running this little beast. I am still a little concerned in keeping it quiet though.
> 
>         Four blade props? I have some of the 18.1 x 12 two bladers but I just cant see how I'll shut the thing up with these paint stirrers??
> 
>         Also-one more question to any of you out there in pattern land.
> 
>         I have struggled with aileron differential for years. I am just not happy with the rolls. I have tried various design fixes-but about the only one that seems to work is to get the wing back to 0-0 ( which can be achieved by a few ways, design, mix or thumbs) Differential itself does not seem to work if the wing is POA ( well...it works for half the roll !)
>         Another black magic fix appears to be to run parallel ailerons-but this only 'sorta' seems to fix it. I like the feel of equal% chord ailerons however.
> 
>         I am frustrated with it-I like my planes to roll as if they had a string up its ...........well you know!
> 
>         OK-any 'secrets' I need to know??? Very good elevator work fixes it ( hence my 0-0 comment)
> 
>         Tom
> 
> 
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