[NSRCA-discussion] Trimming question

[John Ferrell]

It works for me.
It is so easy to try.

I have spent a lifetime in maintenance. I know it does not seem logical to 
those other than us "fixers", but I try to do what is easiest first, what is 
cheapest next and what is leftover for last.

An example is an engine problem that gets new bearings before a new glow 
plug...


John Ferrell
http://DixieNC.US

----- Original Message ----- 
From: "Nat Penton" <natpenton at centurytel.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Tuesday, January 31, 2006 10:09 PM
Subject: Re: [NSRCA-discussion] Trimming question


> John
> You are on to something ,but, the biggie is the one with the longest 
> moment
> arm.            Nat
>
> ----- Original Message ----- 
> From: "John Ferrell" <johnferrell at earthlink.net>
> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> Sent: Monday, January 30, 2006 10:14 AM
> Subject: Re: [NSRCA-discussion] Trimming question
>
>
>> My Guess:
>> The sum of the drag vectors is well above the vertical CG. You MIGHT be
>> able
>> to help the condition with really big wheels generating some drag down
>> low.
>> Its anybody's guess what the turbulance might trigger.
>>
>> The wing is not lifting in knife edge, but it is still draggin'.
>>
>> John Ferrell
>> http://DixieNC.US
>>
>> ----- Original Message ----- 
>> From: "John Pavlick" <jpavlick at idseng.com>
>> To: "NSRCA Discussion" <nsrca-discussion at lists.nsrca.org>
>> Sent: Friday, January 27, 2006 11:31 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
>>> 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?
>>>
>>> John Pavlick
>>> http://www.idseng.com
>>>
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>>
>>
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