2. Two-engine carrier.
Back in the olden days, it was routine to build Tigercats and cut the outboard for LOW, but there was no bonus at all for twins.
I've been thinking of building a twin. Today's rules give you 20 points for keeping both engine running at HIGH, but penalize you half the LOW speed points if an engine quits during the LOW. Thus, you will certainly lose if you fail to keep them both going. So you get an extra 20 points for sure, but would lose about 80-to-100 if something goes wrong.
I haven't seen one twin entered under current rules, have you?
Are the people with money and time invested in single (everybody) willing to give break to a design that could make their stuff uncompetative?