Shane Call's smokey rocket problems.

Would someone be willing to take a look at mine Ave ten me why the smoke is coming out of the feed tube?
 https://youtu.be/6HMjLMx7vs0  

Shane Call wrote:Would someone be willing to take a look at mine Ave ten me why the smoke is coming out of the feed tube?
https://youtu.be/6HMjLMx7vs0

I think this thread is related to a basic rocket mass heater build from a basic plan and in this case using e&e’s books and plans.

Shane Call wrote:Would someone be willing to take a look at mine Ave ten me why the smoke is coming out of the feed tube?
https://youtu.be/6HMjLMx7vs0

Hi Shane,
 Not much experience here to pass on, but I can throw out some super basic ideas.
I am guessing not sufficient draft to pull the flames, so:

1)  Did the riser get primed?  Maybe too cold? Is it insulated?
2)  Check the critical dimensions:
         -is the CSA constant (same cross-sectional area)?
         -is the riser tall enough  (at least 3x the height of the fuel feed, according to "the book"?)

Hopefully some things to get you started before some of the more seasoned folks can chime in.
Best of luck!
Staci

Shane, i split your post, because Stacy's poste would become messy if everybody came in asking for help on their builds in there. Hope you understand.

I thought the chimney needs to be at least 3 x the height of the feed tube. Also, what's the internal diameter of the chimney? I believe the cross sectional area needs to be maintained at the exit and entry points otherwise, you'll choke the stream and cause smoke back..

The riser is too small or the feed is too high. Riser should be more than 3x the feed height. Your feed is competing with the rise of the stack.