[NSRCA-discussion] Trimming question

[Rcmaster199 at aol.com]

The simplest, quickest fix is to turn the wing up side down so the  beastie 
has anhedral. Change nothing else initially.
 
MattK
 
In a message dated 1/30/2006 1:54:57 PM Eastern Standard Time,  
d.pappas at kodeos.com writes:

Hi  Gang, Hi Ken,
The  enswer probably lies in a combo of what Lance and Ron  offered.
How  much is your buddy willingg to cut or add to fix the  problem.
A  ventral strake/subfin will be a great experiment, and I am sure that a 
bunch  of us would like to hear the results.
Raising the stab would be terribly invasive, and also  interesting.
Make  sure the ship flies with a styraight elevator first.
later,
Dean
 
 
Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com  
-----Original Message-----
From:  nsrca-discussion-bounces at lists.nsrca.org  
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of  patterndude at comcast.net
Sent: Monday, January 30, 2006 1:44  PM
To: NSRCA Mailing List
Subject: Re:  [NSRCA-discussion] Trimming question


Ken,
Not always. In level flight the neg incidence will require up trim. In  KE 
flight, the tail has an increased weighting in the balance of forces and  this 
uptrim can be more than needed.
--Lance
 
 
--
District 6 AVP  
www.aeroslave.com
 

--------------  Original message -------------- 
From: "Ken Thompson"  <mrandmrst at comcast.net> 

> Wouldn't negative incidence  cause it to push to the gear, not the canopy? 
> 
> Ken  
> ----- Original Message ----- 
> From: "Lance Van Nostrand"  
> To: "NSRCA Mailing List"  
> Sent: Monday, January 30, 2006  12:40 AM 
> Subject: Re: [NSRCA-discussion] Trimming question  
> 
> 
> > Not many responses to this one, but here's  my thought. The wing 
incidence 
> > is way negative and the CG is  aft. I got myself into that situation once 
> > and didn't catch  it for a while. Inverted flight was fine but the plane 
> > was  
> > squirrely and the up elv trim was more effective in knife  edge than 
level 
> > flight, resultin! g in canopy pull. 
>  > --Lance 
> > 
> > ----- Original Message -----  
> > From: "John Pavlick" 
> > To:  "NSRCA Discussion" 
> > Sent:  Friday, January 27, 2006 10:31 PM 
> > Subject:  [NSRCA-discussion] Trimming question 
> > 
> > 
>  >> Ok here's a good one. The owner of the L.H.S. asked me what I  thought 
> >> about 
> >> this and I couldn't come  up with a good answer. He has a Hangar 9 Ugly 
> >> Stik - the  real big one. I can't remember exactly what it's called. 
Guess 
>  >> it 
> >> has a gas motor in it. It's big. He says he  has it trimmed so it will 
fly 
> >> inverted with just a very  slight bit of down elevator (almost none). 
Ok, 
> >> so  
> >> it's not nose heavy, maybe even a little tail heavy.  Now, when he flies 
> >&! gt; it 
> >> knife edge  (either side) it pulls severely to the canopy. I mean like 
it 
>  >> will fly a complete circle. It needs almost 3/4 down elevator to  fly 
> >> straight. It's beyond a mix - fix. He also says that  it has a bit of 
roll 
> >> couple when flying level (not knife  edge) but it doesn't pitch severely 
> >> up 
> >>  or down under these conditions. Any thoughts? I guess you can rule out  
> >> C.G. 
> >> because if anything it should  pull to the belly considering how it's 
> >> trimmed 
>  >> to fly level upright and inverted. I haven't flown it so I can't  add 
too 
> >> much more. He builds OK so I don't think there's  anything way out of 
> >> alignment, but again I haven't seen  it yet so maybe there is. What 
should 
> >> I 
>  >> look for if I get my hands on it to try and help him?  





-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20060130/9ea908b2/attachment.html