kees ijpelaar

This is fantastic

Isolation on sand is high.

regards

Serbian stuffed peppers.

I did test the rocket with wood, it did blow back, and was not without smell.

I did test it without a shimney so I think I do need really a shimney to let it
work properly, wind blows into the connection now.

is this the problem with smoke is visible.

https://youtu.be/GIhaeVGO5pA

regards

Mony is this world getting harder and harder to earn, while other people getting so much that
she loose there drive to live, no challences anymore.

We need to change that if we want to get better world and more prosperity.

I have now almost done the rocket.

Looks quite oke, but making the openings and make them not leak is challenging.

silver band is I think the solution.

regards

Did change the burntunnel and set rizer to 100 cm.

now it do fine.

https://youtube.com/shorts/WOpY8rFd55A?si=JZZRsKGAjLaXP-fD

I have a less deep feed, is this not a problem?

I have made smaller the burn tunnel so it is almost the same as the riser.
(2 cm2 bigger).

Hi Thomas.

Thanks.

I see that yours go quite deep, how much I need to left over where the flames go
into the burn tunnel?

Looks like a small gap is left.

I can not see clearly because of dark pictures.

Yes I now Peter has did test what was best, some do bend it into the tunnel
but you do not and is as peter did.

Here I see on your thread that someone did go deep into the tunnel, it is have more
surface to heat air. But the mixing of air is way to far into the tunnel, need to start in begin for
for best result. See the pic.

That is not what peter did.



regards

Do somebody now the sizes of the peter channel for rocket J tubes?

How deep it needs, can I bend 90 degree to get it some distance into the burn tube?

Most I see just point down and make the space smaller where fire go into the burn
tunnel.  I did read it prevent also burn up through the feed tunnel.

Thanks.

I have done some measurements.


Because the rizer is round 150 mm, is 175,82 cm2  and the tunnel is square is 150 mm , is 225cm2  I
have the need to make the tunnel less high, the width stays 150.

Now I have in stead of 150 x 150 tunnel a new one of 150 x 120 mm and is now 180 cm2.

I think this is a best way, I have also make the rizer 100 cm high, that is 20 cm more.

the corners in the burn tunnel is just  wider in cm2 then round, that is why in the books the burntunnel
is less high with round rizers.

Now I go change and test.

regards