Look at ST or Retro for example, they are both horrible in thermodynamical and mechanical sense, with extremely turbulent scavenging and big thermal gradients. It seems that the gas flow is allready so f***ed up that it is not possible to disturb it any more.
Chaos is one kind of a harmony.
L
Well put Lauri, but its not about diesel vs glow.
Its about looking at a side mounted port system that works regardless of model pitch angle.
If I may be so bold as to state that your engine does not have all pitch angles covered evenly and symmetrically.
A radially ported engine, when side mounted does.
Mentally draw a clock face on your side mounted engines head and predict what 'times' or angles are going to be encountered during flight and they are probably not the angles that your ports will cover evenly due to engine rotation bias and gravity.
Most schneurle engines have the principle axis (9 o,clock and 12 o'clock) covered quite well and favour the 12 o,clock port through crank swirl but by the look of your engine the transfers are averaged out at 11 o'clock and 7 o'clock, and heavy bias on the exhaust at 9 o'clock but want about the minutes or hours in between?
What if you had a port positioned at every hour of the clock with an exhaust in between them, radially pointing to the centre of the bore? Would that not cover off every angle of pitch you could throw at the model evenly and symmetrically?
And if you accept that, would not the tank on a side mounted model be absolutely inline with the thrust?
But what I am curious about is where exactly does the 'clocks' angular center or centre of rotation lie?
It obviously is not the centre of the engines bore but could be reasonably assumed to be between the centre of lift and the centre of the manoeuvre.
You did ask for thoughts on this .................... and I have them