"Hello Victor,
Thanks for the comments.
Insulated pipe does help when passing through walls or ceilings, or extending the chimney above the roof to improve draft.  I prefer to do the chimney exit as if it were a conventional woodstove, since sometimes people light a fire in the chimney or re-use the same hole for a different stove.

Insulated steel pipe doesn't work in the heat riser, however.  The flame path produces intense amounts of heat.  Steel exposed to these temperatures will warp, melt, or burn out in a relatively short amount of time - usually less than 1 year of regular use, and sometimes within a few firing cycles.  In our permanent installations, we prefer to build this section with a brick liner plus insulation.
-Erica W"

"I am so pleased to meet you and your husband on line, watched all your videos. Watched the construction of your rocket, was wondering if insulated stove pipe in stainless would work at all?  Being as it must be only warm and less as it passes through the wall of a house, when used in that situation.
You would have no need to fill the void as it is already full of insulation?"

"Quite near Roberts 36 but little bigger -39 . plates 20, 6, 5, 4, deck 3 mm Corten b the deck,  welded with ok 73 which is the Icebreaker stick . sail area around 100 m2  mast 14,5 from water lewel Engine MB 3 l 5 cylinder  0m 617 . Plates bended as much as could with turning ....no frames..Stiffness achieved with tanks 600l and sitting cockpit . Strongest 6,6 mm tubes of exaust from cocpit. So 12 t. 12,45 m 3,44 m  See pictures in my facebook wall in my name Markku Vermasvuori."

"Just triangular at the top - supposed to give better windward & tacking performance.  Ours is slightly more flat than usual. 
Ernie would like to know more about your boat!"

"Surely the junk rig is very good for reaching and speed and it comes better when size grows bigger and parts stronger and you have opportunity use harder robbing. But it gives much stress on boats body and asks that cell frame contstruction because of lack of srouds. But it is exellent of turning force ,sail area is mostly down. I think there is not much use to make it more triangle like, then dutch gaff would be better with bended fork or Bermudian rig with all front sails."

"The junk rig is essentially a full-battened gaff rig.  Speed depends more on the hull.  This hull is pretty fast, enough for us anyway!  It's our first sail boat.  We wanted to practice with the junk rig, to decide whether to use it on a larger boat we hope to build one day soon.  We like it well enough to keep using it.  I think the next one will have a sharper angle at the top, more like a triangle than a square."

"Nice pics....what about gaff rig...would it be easier..Exellent wood work..I had also earlier cat.of plywood...fast... You are lovely people. Markku Vermasvuori fr0m ::Finland"

"The barrel has actually been cut roughly in thirds, just below each ring, then sleeved back together. Top fits over bottom; bottom was crimped to fit inside, at some cost to the ducting crimpers involved.  It's shorter and more stable, + larger cooking surface, custom tweaks by a smaller apprentice for cooking in a yurt.  She later peened the top down to make a wok, roughly where Ernie's hand is in this photo.  If you don't have a disposable set of ducting crimpers, a few straight cuts down the bottom part (to just above the intended seam's resting point) would allow the metal to overlap slightly and make a pretty tight fit."

"Did you bury it a bit?"

"Great work!
hope to buid something like that some day in Sapporo (Hokkaido)"

"Rick is one of those amazing people who quietly does what everyone else has been talking about."

"Nice!"

"Thank you."

"We did run the fire with the pipe out the window (supported and sealed by a makeshift box so it didn't just blow right back in).  The exhaust comes out a very low temperature, typically 70 to 100 degrees F.  For permanent installation, however, we do prefer to use a woodstove-type through-roof, for a couple of reasons: 1) it gets the exhaust up where the wind carries it away instead of blowing back down the pipe, and 2) if you put anything that looks like stovepipe through a wall or roof, future residents tend to re-use it when installing a new woodstove of their choice.  Best not to leave them a surprise firetrap."

"It's beautiful!"