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1. 09:25 PM - Re: a few issues: wing gap seal velcro doesn't want to stick well and aileron u-joint seems sloppy (Jay Dub)
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| Subject: | Re: a few issues: wing gap seal velcro doesn't want to stick |
well and aileron u-joint seems sloppy
Just an update. I miss spoke. The velcro I have is the 3m brand. I did push on
it hard and with a few days it really stuck.
On the u-joint, I found it on Aircraft Spruce and reading the reviews someone else
had a sloppy one when new so apparently some are sloppy.
Thanks to everyone for the help.
Jay
Sent:Monday, May 15, 2023 at 7:26 PM
From:"Jay Dub" <bearhawk@gmx.com>
To:kolb-list@matronics.com
Subject:Re: Kolb-List: a few issues: wing gap seal velcro doesn't want to stick
well and aileron u-joint seems sloppy
Yes, the velcro is what came with the kit, however, it still seems sticky but it
would be about 8 years old. I'll get it out in the sun and try applying pressure.
I also thought about burning holes in the reinforced areas and running paracord
from corner to corner just so the fabric gap seal doesn't fly off and
go into the prop.
The u-joint I have is the red one like the picture Stuart sent. It is new. I thought
maybe it was an elongated bolt hole so I removed the u-joint and just the
joint itself has some play. Without cutting off the red rubber seal, I don't
see any way to look at it. The problem with a new one will be getting the holes
in the same place as the old one.
Jay
Sent:Monday, May 15, 2023 at 7:33 AM
From:"Stuart Harner" <stuart@harnerfarm.net>
To:kolb-list@matronics.com
Subject:Kolb-List: Re: a few issues: wing gap seal velcro doesn't want to stick
well and aileron u-joint seems sloppy
Jay,
Are you using the velcro supplied by the factory? The stuff that came
with my Firefly was really sticky but didn't get really stuck until it
had quite a lot of pressure applied to it. It had been folded and the
folds didn't want to come out at first but out in the sunshine when it
warmed up a little I rubbed it all over again and it has stuck really well.
How long has your paint had to cure? Don't know if that matters but
something to think about anyway.
Does the universal joint look like the one in the picture? If it does,
and it has any play in it, I would replace it. Same with the rod ends on
the tubes, mine had no perceivable slop when new except between the bolt
and the eye but that was a very small amount.
I don't know how the joint is constructed under the red seal but was
impressed with it and was told it would outlast the plane. The plans
still showed how to make the torque tube joint with bolts but this is a
much better solution. Maybe you got a bad one?
Stuart
On 5/14/23 23:25, Jay Dub wrote:
>
> Two quick items I'm dealing with as I finish a new build:
> I painted my plane with glossy paint. I put my velcro on the wings for
> the gap seal but it doesn't seem to stick very well. I tried a sample
> of contact cement but that didn't seem to do well either as it seems
> the glossy paint doesn't have "teeth" to grab into. Any ideas how to
> deal with that other than making the lexan hard gap seal or sanding
> down the paint?
>
> My ailerons seem to have a lot of slop. Upon investigation the u-joint
> has slop (not from the bolt holes but the u-joint itself) and the
> upper control rod ends seem to have some slop too. Is this common with
> Kolb Firestars? Is this going to cause a flutter problem? I do have
> the ailerons counterweighted and balanced but I've never flown nor
> worked on an any plane with slop like this. It surprised me being a
> new build and does make me wonder if this is going to create any
> issues when I get to test fly.
>
> Thanks,
> Jay
>
>
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