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Old Apr 15, 2014, 12:59 PM
Thermal, where art thou?
BavarianCharles's Avatar
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Gap Seals On Solid Core Wings

Which DLGs with solid core wings benefit from gap seals, which don't, and which may even be adversely affected?

Feel free to share your experiences ...

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Old Apr 15, 2014, 04:46 PM
a.k.a. Bob Parks
Glendale, AZ
Joined Jun 2008
2,283 Posts
My Vandal from Hell has tape gap seals, and it is quieter with them than without.

More info from others in the Arrow 5 thread

BP
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Old Apr 15, 2014, 08:04 PM
Father of Fr3aK, DLG Pilot
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USA, OH, Worthington
Joined May 2002
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SuperFr3aKs and NXTs will not benefit from gap seals. My testing actually showed that it hurts the performance a bit.
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Old Apr 15, 2014, 08:40 PM
Kyle Clayton
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United States, VA, Dinwiddie
Joined Feb 2008
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I liked it on my Helios and XX LITE. Added a slightly noticeable increase in launch heights, but I never verified that observation with an altimeter.
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Old Apr 15, 2014, 08:50 PM
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Sherchoo's Avatar
Singapore, Singapore
Joined Apr 2012
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The gap seals on my Chili helped quite a bit. The launch was more quieter and maybe 3~4m increase in height...
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Old Apr 15, 2014, 09:32 PM
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United States, CA, Tehachapi
Joined Jun 2011
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Chili is hollow, isn't it?
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Old Apr 18, 2014, 04:08 PM
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United States, AZ, Phoenix
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Anyone have any experience with putting gap seals on a Stobel? Help or hurt launch or handling?
(hmmm... Maybe I should ask Ryan's secretary)
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Old Apr 18, 2014, 07:27 PM
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Joined Jan 2008
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They are very easy to do. Try seals and see.

Better, try them on one side only.

Yours, Greg
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Old Apr 18, 2014, 07:50 PM
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pmackenzie's Avatar
Toronto (Don Mills), Canada
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Quote:
Originally Posted by elac2az View Post
Anyone have any experience with putting gap seals on a Stobel? Help or hurt launch or handling?
(hmmm... Maybe I should ask Ryan's secretary)
Jun runs gap seals on his Stobels:

http://www.rcgroups.com/forums/showt...l#post20594430

I keep meaning to try it, one of these day I might
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Old Apr 18, 2014, 08:05 PM
Mark LSF # 3792
United States, TX, Garland
Joined Nov 2008
602 Posts
I'd be interested to see how it's done. Never could get them to lay flat on the long span of a wing even at rest on my bagged wings unlimited ships. Plus in the air who knows what is happening? Works well on an unlimited rudder like my Pike Perfect though.
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Old Apr 18, 2014, 08:16 PM
Thermal, where art thou?
BavarianCharles's Avatar
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Quote:
Originally Posted by elac2az View Post
Anyone have any experience with putting gap seals on a Stobel? Help or hurt launch or handling?
Quote:
Originally Posted by pmackenzie View Post
Jun runs gap seals on his Stobels
The Stobel is hollow-core, and needs gap seals, which applies to all wings of similar construction.

The Polaris solid-core, but the gap is app. 1/8" wide, and needs to be sealed.

Maybe folks with other solid-core planes (Helios, Fr3aks, etc.) will chime in. My Zone V2 wings don't seem to need them.

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Old Apr 18, 2014, 08:20 PM
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Toronto (Don Mills), Canada
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Why does it matter if it is hollow or solid core?

Unless I am missing something they are both sealed front and back of the hinge line.
(Other than the small hole for the pushrod/RDS shaft)
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Old Apr 18, 2014, 09:19 PM
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United States, CA, San Luis Obispo
Joined Aug 2006
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Taping a thumb drive sized camera to the wing would show very quicly how well the gap seals were laying down in flight.

I think hollow wings tend to be more susceptible to leakage than solid core wings. They can certainly be noisy if not well sealed.
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Old Apr 19, 2014, 11:17 AM
G_T
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Joined Apr 2009
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Solid core has a narrow slot which restricts air motion. Hollow molded has a much larger cavity. It is easier for flow to progress spanwise, and easier for flow to form a little vortex in the channel. The flow will be somewhat different for the two cases.

Gerald
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