Hi Doc:
this Ringmaster d'ont broke the wing.
This model was a fine suprise. Complete FAI manuevers.
But, I have a internal help in Aerospace composites produtcts.
This engine is a CB 25, made in Brasil, abc construction. In speed promocional, it's possible 200 km/h speed, withou internal modifications.
But, it's completly desarmable. Look the shot.