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RE: Pattern ship winglet. - 7/9/2012 2:46 AM   
Bob Pastorello



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Status: offline 		Me, sorry, too...I confused T with "winglet"....which I guess is technically a fin because of it's vertical aspect.  I think on the Voodoo, and on Mark's Designs, the fins add to the "side lifting area" of the fuse for rolling maneuvers, which is probably a cat of a different breed, purpose-wise, from the "canalizer T".
Great discussion - hope to learn more about these mysteries.

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RE: Pattern ship winglet. - 7/9/2012 3:40 AM   
Doug Cronkhite


 

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Status: offline 		The main effect from the fins, t-canns, etc is to straighten the spiral slipstream. It's hard to call their use a band-aid for a design problem, when there isn't any standard fuse design that can straighten spiraling airflow otherwise.

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RE: Pattern ship winglet. - 7/9/2012 4:00 AM   
vbortone


 

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Status: offline 		Doug,

I agree. I installed the T-canns in 4 Abbras. The main effect that I noticed is a net reduction of k.E. mixes. Rudder became more effective so less rudder was need it. Of course they are connected. When people ask me what is that? I tell them that I am sponsored by Carnival Cruise. Here a picture.

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RE: Pattern ship winglet. - 7/9/2012 4:34 AM   
DaveL322


 

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ORIGINAL: serious power




Hi Dave,
I don't doubt ,at all, what you say or have found.
With that said I will add the following;
It was CPLR that brought the the T Can,, to this party.
He has removed the vertical component and now sits the 'winglet' directly on top of the fuz,, .
I'm assuming he finds it as good or maybe even better.

All I am saying is that there is ,so far anyway, no one size fits all solution but there are clearly benefits to these 'winglets'.

Brian


Brian,

We are in agreement that CPLR was the first to use a Tcan configuration, and I am not doubting the effectiveness on his planes. My point (perhaps lacking clarity) was more that simple strakes could provide similar effects as the TCan. And we are certainly in agreement that a given winglet, TCan, or strake should not (and from my experience does not) be expected to have the same result on every design.

Nat Penton was the first I know of to use extensively use strakes - however - I think Nat was coming from different direction. Nat wasn't using small strakes to tweak the airflow around a "cool" looking fuse. Nat ditched the aesthetics and used a minimal fuse with gobs of airfoiled side area where it counts the most - at the CG.

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RE: Pattern ship winglet. - 7/9/2012 5:02 AM   
RC_Pattern_Flyer



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Status: offline 		Dave,

AGREED, i understand the intent of the Pentathlon was to evolve Nats design to something a little more eye appealing to bridge the gap between the limits.

Personally, I feel that the added side are on the CG allows the plane to carve through integrated rolling maneuvers much easier and also allowing any rolling element to require less rudder due to the increased area at the CG.

It is interesting to feel the effects it has on crabbing in the wind and how it is affected by speed.

Chuck Hochhalter

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RE: Pattern ship winglet. - 7/9/2012 1:22 PM   
KGSS28


 

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Status: offline 		Chuck can you describe the effects on your plane in crabbing and wind and speed ? I want to compare it to my Pentathlon.

Thanks Kirk

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RE: Pattern ship winglet. - 7/9/2012 2:19 PM   
RC_Pattern_Flyer



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Status: offline 		If I am flying too slow....the plane will start to fly into the wind..so out requires opposite rudder.
Also same for uplines in heavy crosswind.

Chuck

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RE: Pattern ship winglet. - 7/9/2012 4:40 PM   
KGSS28


 

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Status: offline 		That is what mine does . Still learning to work with it .

Thanks Kirk

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