Hi Paul and all

I would appreciate some wisdom from you guys in relation to:

1. Gascolators - Are they fuel water separators? Is it advisable to
have one
in the system for Western Australian conditions?
My apologies if this is a dumb question.


2. Firewall barriers.
The Glasair Super II RG came with a 0.5 inch Fiberfax sheet and
aluminum
cover sheet. Is this current technology. I understand Fiberfax comes
with
some health warnings when working with the stuff?

Cheers

Steve Izett
Galsair Super II RG Renesis 4 port
Perth, Western Australia

1. Yes they are fuel water separators. Required on cert airplanes by
the FAA here in the US I think. I know it does not rain out there
very much but you never know you might fly someplace where it does.
Darwin maybe.

2. Wear a face mask. I would use thin gage SS instead of aluminum for
a firewall. The melting temp is twice as high. Take no chances with
airborne
fire. Worst thing that can happen to you by far.

Paul Lamar

Howdy, Steve.

I, too, am building a Glasair Super II RG with a Mistral 2 rotor
Rotary.  Nice to hear that someone else is taking the plunge.  As for
the gascolator, many Glasair builders are using the Andair gascolator,
made in England.  Use the big one, even though you don't need the flow
rate.  The big one (I don't remember the model number) has an
automatic bypass valve in the event that the screen gets clogged.

Also, I'd check with the other Glasair builders to see what their
experience with the alum. cover has turned out to be.  I believe that
the protection comes from the fiberfrax, not the aluminum.  The
aluminum is just a cover for keeping the fiberfrax in place over the
long haul.  And, yes, use a respirator.

You may want to consider subscribing to the Glasair list at http://www.glasair.org
.  Lots of very good airframe and construction information there.

Steve Thomas
Super II RG

If the weight penalty is low for SS I don't see the logic of sticking
with a material (aluminum) that has half to 1/3rd the melting temperature.

What is your reasoning Steve? I had one cut at a local sheet metal
shop for my Kis Cruiser. It was cheap.

Paul Lamar

Allo Paul, is that your engine mount? Is it complete? It looks flimsy to
me, what am I missing? Yvon C.

Are you kidding? :) Not flimsy!!!! An identical one survived a crash that buckled the fuselage sheared off the carbon fiber prop blades  and wiped off the landing gear on a BD4. Shearing the prop blades at full power proved the torsional strength of the motor mount.

Read http://www.rotaryeng.net/motor.html

It is designed for 6 G while the rest of your airplane is designed
for 4.5 G. There are at least a dozen out there.


Paul Lamar