"Maybe someone have some exper
"Maybe someone have some experience with upgrading D40A to AD40B? I have twin D40A with 280B legs on Coronet 32 Deep sea 1978, six tons of weight. On 3200 rpm I achieved only 16 knots I think this is a half glidding. So I want to upgrade engines to have more power and change legs to VP duoprops with gear ratio 1,78 :1 or 1,95:1, to achieve at least 20 knots. Please someone to suggest me if I am on right way. I need spares for upgrading! Thanks very much for any answer!!"
"Maybe someone have some experience with upgrading D40A to AD40B? I have twin D40A with 280B legs on Coronet 32 Deep sea 1978, six tons of weight. On 3200 rpm I achieved only 16 knots I think this is a half glidding. So I want to upgrade engines to have more power and change legs to VP duoprops with gear ratio 1,78 :1 or 1,95:1, to achieve at least 20 knots. Please someone to suggest me if I am on right way. I need spares for upgrading! Thanks very much for any answer!!"