Two weeks of standing by the mailbox finally paid off and my box from the Czech Republic showed up! It's a tad longer than the Brown, and a couple grams heavier but it should be more powerful and efficient by a good margin. I hope to be back to building soon- life gets in the way sometimes...

Here's a link to a (short) run of a G-24. With a full liquid charge and a proper RPM setting with this prop and a sub-25g model, a two-minute run is about right. Long enough to need a DT!

https://www.youtube.com/watch?v=B0fh6apMyqA

Craig - the last time I saw some good stainless tubing and little vessels, work like that, was in grade 7 Science Project class, where we all had to build something.   In walks this kid, Ralph Michaelis, with a brilliant primitive tiny working steam engine locomotive all soldered and welded with tubing and boilers and silver and bronze.   The teacher, a big 6'4" red-haired man named Mr. Boughner, tells us all that Ralph's Dad made it for him.  Then, Mr. Boughner grabs my big, "double A frame", wooden counterweight Trebuchet catapult.  It had a slingshot pouch and a long swinging arm with a lot of counterweight lead on the short end, made from depleting my Dad's supply of lead wheel balance counterweights for car wheels at his garage, and melting them all down into two forms.  Then, to my surprise, Mr. Boughner turns into a gleeful child with a toy,  and proceeds to launch a handful of giant beauty boulder marbles, one after the other, right over all of the kid's heads from the front of the class, and flying very very fast into the ceiling and walls and ricocheting everywhere as the kids sat there dumbfounded like paralyzed sitting ducks.  And these boulders flew almost as fast as you could throw them !!  Strange things happened in schools in the olden days ...
Craig - don't tell me you made a still for science class ... 

Jeez, LWM, I'm disappointed! I thought you, of all people, would comment on my mad hillbilly skills of building a moonshine still into a peanut-scale aeroplane!

The screaming Brown Campus A-23!

At any rate, a couple evenings and most of the weekend has it ready to cover. The plans include a rather ingenious retracting gear, but as it only has about 32 square inches of wing, I decided to forego the weight. I imagine I'll install a couple unobtrusive "whiskers" to save on prop strikes. All up, as pictured, it weighs 18.1g. The complete Brown motor, with tank, plumbing, and prop, weighed in at 7.2g., about a gram more than the kit rubber, nose button, prop, and rear peg. The diminutive size is apparent when you see it hides behind that 7/32" nose bowl!
The "gas tank" is located on cg, so consuming the approx 3g load of CO2 shouldn't affect trim.
Right now, it balances just a TRIFLE nose heavy on indicated cg, about what cover and the cockpit windows should offset.
Hopefully, since the wing is in the "low speed/ takeoff" camber configuration, it'll be light enough to fly!

One interesting feature is the way the HS attaches to the duck tailed rear fuse. The leading edge is attached on a step, leaving the TE free to be shimmed up from the rather severe incidence at full droop. It should make it easy to trim!

This is an interesting kit and a fun build. Jetco went about things a little differently. The fuselage is built top-half first with split formers. Then, it's flipped and the bottom formers are added. It's designed with 2 degrees down thrust built in. The formers are, with two exception, free of stringer notches and rather have a polygonal shape with the stringers glued over the points. It was a little different to work with, but actually made it easy to get the stringers run fair. It did, as you can imagine, make me wish I hadn't sworn off CA!