I didn't read all the replies, so if someone covered this, sorry. why use counter-rotating engines? Use the transmissions to handle that; run...
What are the determing factors in selecting the appropriate sized oil cooler for an inboard transmission? is there a 'standard rule' for the...
What equation(s) can I use to calculate thrust at various RPM for various PWC impellers? I realize that it will depend on the intake channel...