[NSRCA-discussion] Impact

[Adam Glatt]

My thought when this was first posted was that he was using too much 
elevator during the snap.  Your response below confirms that.  IMO, the 
best control input for a snap is:

1(Break). Bang in lots of elevator, then switch to the next portion when 
it has visibly 'broken.'
2(Rotation). Full ailerons, moderate rudder, almost no elevator.  Go to 
neutrals when rotation is complete.

More elevator during a snap's rotation is more bad.  Elevator during a 
snap makes the plane's CofG move - this makes it look like a barrel 
roll, it makes the plane lose bunches of speed, and it makes it nearly 
impossible to exit the snap on proper pitch heading.

And if this doesn't work, remember that I last flew a pattern plane 
August 28, 2005, and will next fly one in about 4 weeks, so you should 
have never listened to me ;>

-Adam

Ron Van Putte wrote:
> On Apr 16, 2006, at 5:57 PM, Bill Glaze wrote:
>
>   
>> What is it doing?
>>     
>
> To the left, it looks like it's starting a barrel roll, then it  
> breaks into the snap; however, it's hard to stop reliably.
> To the right, it is much more ready to snap, but it just doesn't look  
> "right".
> There's a "ton" of elevator; so much so that the airplane is "touchy  
> in pitch.
>
>   
>> It sounds as if the snap, (break) is either missing, or
>> not sufficient to properly stall the wing.
>>     
>
> That fat wing just doesn't seems to like to snap.
>
>   
>> How about elevator throws?  Has he tinkered with them?
>>     
>
> Yep.
>
>   
>> Does entry speed make a difference?
>>     
>
> The only entry speeds he's tried are what you'd expect for the  
> Reverse Avalanche and the 45 Down Snap.
>
> Ron Van Putte
>   
>> ----- Original Message -----
>> From: "Ron Van Putte" <vanputte at cox.net>
>> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
>> Sent: Sunday, April 16, 2006 5:50 PM
>> Subject: [NSRCA-discussion] Impact
>>
>>
>>     
>>> Guys - John Fuqua has a problem with his Impact and asked me to post
>>> it to the NSRCA Discussion List because he's not on the List.  His
>>> Impact flies great, but does not snap roll consistently to the left.
>>> Snaps to the right are much better, but still not great  The CG is as
>>> far back as he dares to go.  In fact, he'd like to move it further
>>> forward, but it wouldn't snap at all then.  Any ideas?  Jason, are
>>> you out there?
>>>
>>> Ron Van Putte
>>> _______________________________________________
>>> NSRCA-discussion mailing list
>>> NSRCA-discussion at lists.nsrca.org
>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>>
>>>       
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>>     
>
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