Simple wing retention

[Henderson,Eric]

I copied Chip's method of one 4-40 on the top and one on the bottom. You leave the bottom one in all of the time. With fixed gear you almost always put the wings on with the plane sitting on the ground. In the event of an "inverted" wing removal you have the option to remove the lower bolt instead.

In bigger planes, and also seen on a Pappas creation, I use 1/4 x 20 nylon screws into the wing tube. 

Lamar Blair and Jerry Stebbins sell a very nice nylon insert that grabs the 4-40 very well indeed. A very neat homemade option is to use plastic water pipe. One that has too big a diameter. What you do is cut off a 1/2" wide piece. Then cut out enough of the "ring" so that it can be compressed and pushed into the wing tube. A touch of CA and you have a section that can be threaded and will "grab" your $4000 screw.

Regards,

Eric.

-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Dean Pappas
Sent: Friday, January 16, 2004 10:50 AM
To: discussion at nsrca.org
Subject: RE: Simple wing hold down 


Yo, Anthony ...
That idea makes so much sense, that it hurts!
As the old addage goes, "If you can't hide it, scream it".
Put some sort of trim around it: make it look like a gas-cap,
after all, it's in about the right spot.
Regards,
	Dean P.



-----Original Message-----
From: Anthony Romano [mailto:anthonyr105 at hotmail.com]
Sent: Friday, January 16, 2004 10:28 AM
To: discussion at nsrca.org
Subject: Simple wing hold down 


The last four planes have all relied on the $4000 bolt. The latest has a 
great innovation. The bolts are on the top of the wing. I always complained 
it is aesthetically unpleasing but pretty simple. Leave the tube in one 
panel and the plane comes out of the car to have the wings installed 
immediately. Plane gets carried in one piece to pits to be fuelled. One bolt 
and I am ready to go fly. If I get nervous and need to check it is right 
there in plain sight. Very quick when it rains too!

Anthony


>From: Rodney Tanner <rodney19821982 at yahoo.com>
>Reply-To: discussion at nsrca.org
>To: discussion at nsrca.org
>Subject: Re: Wing hold down - Failsafes
>Date: Thu, 15 Jan 2004 17:13:54 -0800 (PST)
>
>I wondered when someone would mention those old friends. . . .
>I  have used good ol hooks and rubber bands on my last three pattern planes 
>and for the Tem-Poon (Typhoon fuz, Temptation wings and stab) that will be 
>ready in a few weeks. Dennis Hunt put me onto them, with the Extra and 
>Viper projects he did. As Bill says, its simple and idiot proof (till now) 
>and does´nt create any unwanted stress points.  Some people stay away from 
>them because the rubber bands cross in front of the wing tube, where the 
>tank sits. Sooooo put them under the tank then!
>Rodney
>NSRCA # 2906
>
>Sneedb at aol.com wrote:
>I've been using the old hooks and rubber bands method to hold the wings on 
>for years.  When I remove the bands from the hooks I immediately wrap the 
>bands around the prop and spinner and leave them there.  When you go out 
>for your next flying sesson you're not going to start the engine with 
>rubber bands wrapped around your prop and spinner.  Not fool proof but 
>pretty close    Bill
>
>
>
>---------------------------------
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