Today's Message Index:
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1. 06:34 AM - Re: Removing PVA release agent (david miller)
2. 01:05 PM - Reenforcement of baggage bays (Rick Stockton)
Message 1
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| Subject: | Re: Removing PVA release agent |
Andrew,
My kit had foam wings.
You would very quickly notice if there was a problem with adhesion,
voids would be
visible, and it would be possible to lift the edge of the lay up,
don't ask me how I know.
Dave
do not archive
On 11-Jul-08, at 5:26 PM, Andrew Sarangan wrote:
> <asarangan@gmail.com>
>
> Now you are getting me worried. I did not wash my XS wing spar before
> applying the reinforcement plies, nor did the manual mention it. I
> simply scuff sanded it. But I did not notice any adhesion problems.
> Anyone else notice this?
>
>
> On Fri, Jul 11, 2008 at 5:06 PM, david miller
> <loboloda@execulink.com> wrote:
>> <loboloda@execulink.com>
>>
>> Andrew,
>>
>> My spars were coated with something, I presume it was a release
>> agent,
>> nothing would stick to it.
>> I tried detergent and water, and tri sodium phospate, neither of
>> which did
>> much.
>> Sanding just worked the contaminant into the spars.
>> Eventually I tried Comet kitchen cleaner, and the foaming/scouring
>> action
>> plus lots of water
>> cleaned them well.
>> After this a friend from the auto industry gave me a bottle of
>> "Polycracker"
>> prep wash.
>> Sprayed on wiped off and rinsed, the stuff was brilliant at removing
>> whatever was on the spars.
>>
>> Dave
>>
>> On 11-Jul-08, at 12:23 PM, Andrew Sarangan wrote:
>>
>>> <asarangan@gmail.com>
>>>
>>> I am not sure what the PVA release agent looks like. My cockpit
>>> module
>>> has very thick glossy stuff all over the the underside. It looks
>>> more
>>> like excessive epoxy. But I am concerned if this might be the PVA
>>> release agent. If so, it's not going to come off with any amount of
>>> washing in soap and water. Some heavy duty sanding would be in
>>> order.
>>> Does anyone have some advice on this?
>>> Thanks!
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>
>
Message 2
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| Subject: | Reenforcement of baggage bays |
I just started chapter 29 for the tri gear. On page 29-2 Issue 3. It states to
lay up two plies of "bid" at 45 degrees over the entire are up to the top level
of the central tunnel.
I just did one ply and it was the most difficult lay up so far. There are no
measuremnts given and the cloth folds onto its self while I tried to do the lay
up.
It seems the there should be a better way of doing this lay-up. Has somebody
come up with a good method? I looked at all the pictures, but they only show
the finished product.
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