The July/August Sport Rocketry article 'Igniter Building Seminar' calls for
Nitrate clear aircraft dope. Is that the same thing as Aerogloss fuelproof
clear aircraft dope? A lady at our local hobby store said that 'it must
be', even though the word nitrate doesn't appear on the label anywhere.
When I asked why it must be the same, she said 'because that's the only kind
we've ever sold'! Anyway, if it's not the same, where can I get this
No, it's not. If it doesn't say NITRATE, then it's not nitrate. Most dope
used for model airplanes is Butyrate "hot fuel proof". It's NOT what you
want for conductive primer. You can get real Nitrate from SIG, or perhaps
from the local airport, as it's still used on real cloth covered aircraft.
You can also find it in a GOOD hobby shop and avoid the HAZMAT shipping (try
one that has Free Flight supplies). I still use it on all my BGs when I
tissue them. You can use Nitrate UNDER other dope or epoxy finishes, but NOT
on top of them.
Bob Kaplow NAR # 18L >>> To reply, there's no internet on Mars (yet)! <<<
Kaplow Klips & Baffle: http://nira-rocketry.org/Document/MayJun00.pdf
Contact the EAA (expermental aircraft association) to find a chapter
near you. If you live near a general avaition airport you might
find someone rebuilding an old airplane in a hanger there who might
give you some leftover dope from a repair (look for someone rebuilding
an old Steerman Biplane).
In a lousy attempt to hijack this thread, I finally had a free weekend
and flew three C-BG's that had been sitting in a Houston garage for
three years. For those of you who may not know, Bob is very fond of
Houston heat and humidity. Nekked balsa wings will warp simply
watching them down here. These three particular BGs had larger wings
with various tissue but doped. All of them held their trim pretty much
the way I remember them last flying -- One thermalled away. The
prettiest one too. Dammit.... :-)
Nitrate dope -- Good stuff... The thoughts of simply dunking gliders
into a five gallon bucket of nitrate dope is intriguing...
A good RC Plane hobby shop will probably have a little bit of Nitrate
Dope in stock, or can order it. But, as others have said, AeroGloss
is definitely Butrate, not Nitrate.
The brand I used to use was Broderick, but I didn't see them listed at
any hobby shop URLs just now. If the bottle says anything about "hot
fuel proof", it is Butrate. The reason that most shops don't carry
much Nitrate, is that it dissolves when exposed to alcohol /
nitromethane based fuels.
If you try to borrow a bit from someone who works with full size
airplanes, not models, you also need to borrow enough thinner to cut
it down at least 50%. The full strength stuff has "lots" of disolved
solids and will tend to shrink to the point that it distorts ignitors.
Thin it till it's just a little bit thicker than water. An ounce or
two of thinned dope will make many, many ignitors. You don't want
much on hand, it doesn't store well.
Be very careful with it, the fumes are very flamable, more so than
gasoline and the dope itself will burn easily, even when dry. That's
why it makes such a good binder for ignitors.
On 10 Aug 2005 20:54:11 -0500, kaplow email@example.com (Bob
I don't think its Butrate anymore, Formulas changed when RPM
closed out the Pactra line to Testors, and there was another chemistry
change about 10 years before that, when the Thinner was still in the
dark brown bottles
I think Aerogloss is some kind of Acrylic Lacquer now, hadn't been
Butyrate for a long time.
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