Re: [bolger] Gluing plywood sheets
From: <cpcorreia@...>
you use slow cure times so you have plenty of time to do the lay up.
The really high tec guys use pre impragnated cloth (prepeg) the cures
at elevated temperture. System 3's vacuum bagging system uses
a resin that needs to be heated to 130 degrees to achive full strength.
If foam is involved you have to be careful that you don't compress the
foam by pulling too hard a vacuum on it.
Gordon W5RED
G. C. Cougergcouger@...Stillwater, OK
www.couger.com/gcouger
"You miss 100 percent of the shots you never take." - Wayne Gretzky
> I'm not an expert, but I did watch an expert (Derek Kelsall) vacuum bag70
> composite hull where he only keep the vacuum on for approx. 20 minutes in
> degree temp. Now he was using the old resin (don't remeber the techname),
> vs. epoxy, but why would the vacuum need to be on overnite with epoxy?Seems
> like overkill.The time is dependent on the time it takes the epoxy to cure. Generaly
>
> Also, we drilled several holes in the vacuum tube to keep the vacuum from
> overheating.
you use slow cure times so you have plenty of time to do the lay up.
The really high tec guys use pre impragnated cloth (prepeg) the cures
at elevated temperture. System 3's vacuum bagging system uses
a resin that needs to be heated to 130 degrees to achive full strength.
If foam is involved you have to be careful that you don't compress the
foam by pulling too hard a vacuum on it.
Gordon W5RED
G. C. Cougergcouger@...Stillwater, OK
www.couger.com/gcouger
"You miss 100 percent of the shots you never take." - Wayne Gretzky