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Old May 07, 2003, 04:01 AM
David AMA40795 / KC5UH
Guest
n/a Posts
Wing panel retention

I'm to the point where I gotta decide how to hold the wing panels to
the fuselage on my Dynaflite Super Cub.

The instructions suggest drill and tap the hardwood block for nylon
screws, or install cuphooks and use rubber bands to retain the panels.
Rubber bands and cuphooks - I think NOT.

Would you use nylon screws, or metal? I'm thinking about using metal
'wing screws'. Using wing screws would also allow using some foam
rubber to jam the screws to keep them from backing out.

David
Old May 07, 2003, 04:01 AM
Paul McIntosh
Guest
n/a Posts
Re: Wing panel retention

Use the right size nylon screws. They not only will not back out in flight
but will break off limiting damage in certain situations.

"David AMA40795 / KC5UH" <#$%^ham2405@yahoo.com> wrote in message
news:3eb87d1d.20877430@netnews.attbi.com...
> I'm to the point where I gotta decide how to hold the wing panels to
> the fuselage on my Dynaflite Super Cub.
>
> The instructions suggest drill and tap the hardwood block for nylon
> screws, or install cuphooks and use rubber bands to retain the panels.
> Rubber bands and cuphooks - I think NOT.
>
> Would you use nylon screws, or metal? I'm thinking about using metal
> 'wing screws'. Using wing screws would also allow using some foam
> rubber to jam the screws to keep them from backing out.
>
> David



Old May 08, 2003, 04:00 AM
u0000
Guest
n/a Posts
Re: Wing panel retention

Hi, dave
the reason for using nylon screws is that in case of a minor crash event
the nylon screws break apart
and the fuselage does not receive any torsion or shrinking stress.
As you know, flying is the second thrill known to men, but landing is the
first .... so is possible that during a bad or hard
landing the wing hit the ground. If you use the metal screw, and there is
enough momentum your wing crash and the fuselage
will crash as well. Using nylon can save either wing and fuselage. The only
question is .... which diameter to use.
I hope my English is good since i am Italian.... greatings from Rome, Italy.
:-) Fabio

"David AMA40795 / KC5UH" <#$%^ham2405@yahoo.com> ha scritto nel messaggio
news:3eb87d1d.20877430@netnews.attbi.com...
> I'm to the point where I gotta decide how to hold the wing panels to
> the fuselage on my Dynaflite Super Cub.
>
> The instructions suggest drill and tap the hardwood block for nylon
> screws, or install cuphooks and use rubber bands to retain the panels.
> Rubber bands and cuphooks - I think NOT.
>
> Would you use nylon screws, or metal? I'm thinking about using metal
> 'wing screws'. Using wing screws would also allow using some foam
> rubber to jam the screws to keep them from backing out.
>
> David



Old May 08, 2003, 04:00 AM
David AMA40795 / KC5UH
Guest
n/a Posts
Re: Wing panel retention

I should have described the wings ! The panels slide onto an aluminum
tube which is inserted thru the fuselage. Both the panels and the
fuselage have cardboard tubes that the aluminum tube slips inside of.
The screws will thread in parallel to the wing spars from inside the
radio box in the top of the fuselage - they merely keep the wing from
sliding off the tubes. There could be a bit of flexing, putting the
screws in tension. I know that 1/4 - 20 screws hold the wings on many
a 90 size plane, but this is a 1/4 scale 15-17lb plane.

David

On Wed, 07 May 2003 03:34:24 GMT, #$%^ham2405@yahoo.com (David
AMA40795 / KC5UH) wrote:

>I'm to the point where I gotta decide how to hold the wing panels to
>the fuselage on my Dynaflite Super Cub.
>
>The instructions suggest drill and tap the hardwood block for nylon
>screws, or install cuphooks and use rubber bands to retain the panels.
>Rubber bands and cuphooks - I think NOT.
>
>Would you use nylon screws, or metal? I'm thinking about using metal
>'wing screws'. Using wing screws would also allow using some foam
>rubber to jam the screws to keep them from backing out.
>
>David


Old May 08, 2003, 04:00 AM
Six_O'Clock_High
Guest
n/a Posts
Re: Wing panel retention

1/4-20 plastic screws will do just fine. Make sure your struts are on
securely because I am almost positive that they ARE functional!

"David AMA40795 / KC5UH" <#$%^ham2405@yahoo.com> wrote in message
news:3eb9bba4.42708052@netnews.attbi.com...
> I should have described the wings ! The panels slide onto an aluminum
> tube which is inserted thru the fuselage. Both the panels and the
> fuselage have cardboard tubes that the aluminum tube slips inside of.
> The screws will thread in parallel to the wing spars from inside the
> radio box in the top of the fuselage - they merely keep the wing from
> sliding off the tubes. There could be a bit of flexing, putting the
> screws in tension. I know that 1/4 - 20 screws hold the wings on many
> a 90 size plane, but this is a 1/4 scale 15-17lb plane.
>
> David
>
> On Wed, 07 May 2003 03:34:24 GMT, #$%^ham2405@yahoo.com (David
> AMA40795 / KC5UH) wrote:
>
> >I'm to the point where I gotta decide how to hold the wing panels to
> >the fuselage on my Dynaflite Super Cub.
> >
> >The instructions suggest drill and tap the hardwood block for nylon
> >screws, or install cuphooks and use rubber bands to retain the panels.
> >Rubber bands and cuphooks - I think NOT.
> >
> >Would you use nylon screws, or metal? I'm thinking about using metal
> >'wing screws'. Using wing screws would also allow using some foam
> >rubber to jam the screws to keep them from backing out.
> >
> >David

>
>



Old May 08, 2003, 04:00 AM
Paul McIntosh
Guest
n/a Posts
Re: Wing panel retention

Actually, the cup hooks and rubber bands is a very secure way of doing it.
There is a lot of friction on the wing tubes while flying and the wings
won't move much. The rubber bands just maintain tension.

"David AMA40795 / KC5UH" <#$%^ham2405@yahoo.com> wrote in message
news:3eb9bba4.42708052@netnews.attbi.com...
> I should have described the wings ! The panels slide onto an aluminum
> tube which is inserted thru the fuselage. Both the panels and the
> fuselage have cardboard tubes that the aluminum tube slips inside of.
> The screws will thread in parallel to the wing spars from inside the
> radio box in the top of the fuselage - they merely keep the wing from
> sliding off the tubes. There could be a bit of flexing, putting the
> screws in tension. I know that 1/4 - 20 screws hold the wings on many
> a 90 size plane, but this is a 1/4 scale 15-17lb plane.
>
> David
>
> On Wed, 07 May 2003 03:34:24 GMT, #$%^ham2405@yahoo.com (David
> AMA40795 / KC5UH) wrote:
>
> >I'm to the point where I gotta decide how to hold the wing panels to
> >the fuselage on my Dynaflite Super Cub.
> >
> >The instructions suggest drill and tap the hardwood block for nylon
> >screws, or install cuphooks and use rubber bands to retain the panels.
> >Rubber bands and cuphooks - I think NOT.
> >
> >Would you use nylon screws, or metal? I'm thinking about using metal
> >'wing screws'. Using wing screws would also allow using some foam
> >rubber to jam the screws to keep them from backing out.
> >
> >David

>



Old May 09, 2003, 04:00 AM
Gord Schindler
Guest
n/a Posts
Re: Wing panel retention

Rubber bands and cuphooks along with the functional struts will hold the
wing on just fine. Heck, the wings on my 1/4 scale beaver -at 20lbs- are
only held to the fuse sides (plywood) with 2 6-32 screws each side along
with the functional struts. Hundreds of flights and the wing has not come
loose yet. The rubber band/cuphook arrangement is an old technique that
works very well.
Gord Schindler
MAAC6694

"David AMA40795 / KC5UH" <#$%^ham2405@yahoo.com> wrote in message
news:3eb9bba4.42708052@netnews.attbi.com...
> I should have described the wings ! The panels slide onto an aluminum
> tube which is inserted thru the fuselage. Both the panels and the
> fuselage have cardboard tubes that the aluminum tube slips inside of.
> The screws will thread in parallel to the wing spars from inside the
> radio box in the top of the fuselage - they merely keep the wing from
> sliding off the tubes. There could be a bit of flexing, putting the
> screws in tension. I know that 1/4 - 20 screws hold the wings on many
> a 90 size plane, but this is a 1/4 scale 15-17lb plane.
>
> David
>
> On Wed, 07 May 2003 03:34:24 GMT, #$%^ham2405@yahoo.com (David
> AMA40795 / KC5UH) wrote:
>
> >I'm to the point where I gotta decide how to hold the wing panels to
> >the fuselage on my Dynaflite Super Cub.
> >
> >The instructions suggest drill and tap the hardwood block for nylon
> >screws, or install cuphooks and use rubber bands to retain the panels.
> >Rubber bands and cuphooks - I think NOT.
> >
> >Would you use nylon screws, or metal? I'm thinking about using metal
> >'wing screws'. Using wing screws would also allow using some foam
> >rubber to jam the screws to keep them from backing out.
> >
> >David

>



Old May 09, 2003, 04:01 AM
David AMA40795 / KC5UH
Guest
n/a Posts
Re: Wing panel retention

I specifically asked Dynaflite if the struts were functional or for
looks - these are just for looks. All the strength is in the
tubes/spars construction.

David

On Thu, 08 May 2003 03:48:05 GMT, "Six_O'Clock_High"
<Target_Lock@guns.com> wrote:

>1/4-20 plastic screws will do just fine. Make sure your struts are on
>securely because I am almost positive that they ARE functional!
>
>"David AMA40795 / KC5UH" <#$%^ham2405@yahoo.com> wrote in message
>news:3eb9bba4.42708052@netnews.attbi.com...
>> I should have described the wings ! The panels slide onto an aluminum
>> tube which is inserted thru the fuselage. Both the panels and the
>> fuselage have cardboard tubes that the aluminum tube slips inside of.
>> The screws will thread in parallel to the wing spars from inside the
>> radio box in the top of the fuselage - they merely keep the wing from
>> sliding off the tubes. There could be a bit of flexing, putting the
>> screws in tension. I know that 1/4 - 20 screws hold the wings on many
>> a 90 size plane, but this is a 1/4 scale 15-17lb plane.
>>
>> David
>>
>> On Wed, 07 May 2003 03:34:24 GMT, #$%^ham2405@yahoo.com (David
>> AMA40795 / KC5UH) wrote:
>>
>> >I'm to the point where I gotta decide how to hold the wing panels to
>> >the fuselage on my Dynaflite Super Cub.
>> >
>> >The instructions suggest drill and tap the hardwood block for nylon
>> >screws, or install cuphooks and use rubber bands to retain the panels.
>> >Rubber bands and cuphooks - I think NOT.
>> >
>> >Would you use nylon screws, or metal? I'm thinking about using metal
>> >'wing screws'. Using wing screws would also allow using some foam
>> >rubber to jam the screws to keep them from backing out.
>> >
>> >David

>>
>>

>
>


Old May 09, 2003, 04:01 AM
David AMA40795 / KC5UH
Guest
n/a Posts
Re: Wing panel retention

I guess I'll need to rethink the retention ! It sure would be easier
to drill a couple of holes in the fuselage for cuphooks to slide thru,
then pop on a couple of rubberbands. It would be a LOT easier on my
arthritic fingers, not having to screw in a couple of screws in a
tight space.

One question then.... what size rubberbands? Is a couple of our
ubiquitous #64 that we use for trainer wings acceptable?

David

On Thu, 8 May 2003 07:35:48 -0400, "Gord Schindler"
<gords@idirect.com> wrote:

>Rubber bands and cuphooks along with the functional struts will hold the
>wing on just fine. Heck, the wings on my 1/4 scale beaver -at 20lbs- are
>only held to the fuse sides (plywood) with 2 6-32 screws each side along
>with the functional struts. Hundreds of flights and the wing has not come
>loose yet. The rubber band/cuphook arrangement is an old technique that
>works very well.
>Gord Schindler
>MAAC6694
>
>"David AMA40795 / KC5UH" <#$%^ham2405@yahoo.com> wrote in message
>news:3eb9bba4.42708052@netnews.attbi.com...
>> I should have described the wings ! The panels slide onto an aluminum
>> tube which is inserted thru the fuselage. Both the panels and the
>> fuselage have cardboard tubes that the aluminum tube slips inside of.
>> The screws will thread in parallel to the wing spars from inside the
>> radio box in the top of the fuselage - they merely keep the wing from
>> sliding off the tubes. There could be a bit of flexing, putting the
>> screws in tension. I know that 1/4 - 20 screws hold the wings on many
>> a 90 size plane, but this is a 1/4 scale 15-17lb plane.
>>
>> David
>>
>> On Wed, 07 May 2003 03:34:24 GMT, #$%^ham2405@yahoo.com (David
>> AMA40795 / KC5UH) wrote:
>>
>> >I'm to the point where I gotta decide how to hold the wing panels to
>> >the fuselage on my Dynaflite Super Cub.
>> >
>> >The instructions suggest drill and tap the hardwood block for nylon
>> >screws, or install cuphooks and use rubber bands to retain the panels.
>> >Rubber bands and cuphooks - I think NOT.
>> >
>> >Would you use nylon screws, or metal? I'm thinking about using metal
>> >'wing screws'. Using wing screws would also allow using some foam
>> >rubber to jam the screws to keep them from backing out.
>> >
>> >David

>>

>
>


Old May 10, 2003, 04:00 AM
philip-rawson
Guest
n/a Posts
Re: Wing panel retention

David AMA40795 / KC5UH wrote:
> I should have described the wings ! The panels slide onto an aluminum
> tube which is inserted thru the fuselage. Both the panels and the
> fuselage have cardboard tubes that the aluminum tube slips inside of.
> The screws will thread in parallel to the wing spars from inside the
> radio box in the top of the fuselage - they merely keep the wing from
> sliding off the tubes. There could be a bit of flexing, putting the
> screws in tension. I know that 1/4 - 20 screws hold the wings on many
> a 90 size plane, but this is a 1/4 scale 15-17lb plane.


In that case, if you've got functioning struts, you don't really need
anything to hold the wings on... I fly a 1/4 scale Champ (with wing struts),
the wings slide into the top of the fuselage on tubes. With the struts on,
the wings can't pull off the fuselage. I also have another smaller plane
that uses struts, I don't use any other wing retention on that either.

If you feel this is unreasonable for your plane, I suggest that you don't
need anything particularly strong, just make it easy to do up and undo. Cup
hooks and elastic bands seem good to me... or a tie-wrap instead of the
elastic bands...

--
Philip Rawson

www.flymodels.co.uk
www.aeromodeller.org


Old May 10, 2003, 04:00 AM
emcook@yahoo.com
Guest
n/a Posts
Re: Wing panel retention

Sig Something Extra wings are held on with rubberbands and hooks.

If I am not mistaken I have read several post where the connections
have failed and resulted in the plane being lost.

Of course the Something Extra is more of a 3D machine and the wings
subject to much higher centrifigual force in fast rolls.

You might search for the solutions that the Something Extra people
have implemented.

On you plane if you did nothing, the struts by themselves would
probably hold the wings in place ok.


On Thu, 08 May 2003 02:17:44 GMT, #$%^ham2405@yahoo.com (David
AMA40795 / KC5UH) wrote:

>I should have described the wings ! The panels slide onto an aluminum
>tube which is inserted thru the fuselage. Both the panels and the
>fuselage have cardboard tubes that the aluminum tube slips inside of.
>The screws will thread in parallel to the wing spars from inside the
>radio box in the top of the fuselage - they merely keep the wing from
>sliding off the tubes. There could be a bit of flexing, putting the
>screws in tension. I know that 1/4 - 20 screws hold the wings on many
>a 90 size plane, but this is a 1/4 scale 15-17lb plane.
>
>David
>
>On Wed, 07 May 2003 03:34:24 GMT, #$%^ham2405@yahoo.com (David
>AMA40795 / KC5UH) wrote:
>
>>I'm to the point where I gotta decide how to hold the wing panels to
>>the fuselage on my Dynaflite Super Cub.
>>
>>The instructions suggest drill and tap the hardwood block for nylon
>>screws, or install cuphooks and use rubber bands to retain the panels.
>>Rubber bands and cuphooks - I think NOT.
>>
>>Would you use nylon screws, or metal? I'm thinking about using metal
>>'wing screws'. Using wing screws would also allow using some foam
>>rubber to jam the screws to keep them from backing out.
>>
>>David


 


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