pulsejet question

[haaken]

main chaimber diameter and lenght:
91.4mm lenght 89 mm
cone:
91.4mm opening in front,
lenght is 125mm,
end diameter of cone is 57mm,
exhaust tube diameter is 57mm and lenght is
665.1mm

i am planning to use a valve grid design on it, does the dimentions look ok ?

I can post complete plans.
i have calculated it to deliver aprox. 25kg of trust.

The two intake ports that leads to the valves is 67.97x25.2 mm
They are spaced 10.03 apart.