Help with my rocket mass stove

hey all, here is the beginning of my Rocket mass stove build. Im building it outside first and would love to have your opinions on what you think.
Please give me constructive criticism as thats how i learn best
Attached video to watch my current placement

the dimension sim using are as follow
all is 8 square inch
heat riser is 34 inches
tunnel is 16 inches and burn tube is 8 inches

Without the barrel I was getting a great suction of air but after putting on the barrel there is less suction and rocketyness.
Wondering if I have to heat it up longer before I see the real rocketyness of the stove hope you guess have some comments!
Thanks
-OYoutube rocket mass stove

Hi Ori;   What you are experiencing is very common.
New builds with wet cob over the pipes constantly have draw issues.

What is wrong, is your "mass" pipe has no mass!  That light pipe is shedding heat to fast.  Your losing your draw.
You need a real mass heating up to create the draw necessary to rocket!
And that mass needs to be insulated from the ground and dry.

Heater Overview

Batch Box Build

Hope this gives you some answers.

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I see two things: If you were to put the end of your exhaust pipe vertically so it was long enough to be above the top of your barrel, this would help create the draw you lost when the barrel went on.
Second, the fact that your pipe is corrugated means it is putting a lot of unnecessary drag on the exhaust. If you switch to smooth pipe, it will also help.

Nice, That feedback was really helpful Ill make the changes and report back to yall!
-O

how far is the drum end from the top of the riser? I give it at least 3"

@chris McClellan

I gave it a little more then 2 inches. I can try out 3 inches and see how it does
-O