Hi, In the 38C performance spec I have down loaded, it states Cruise --19 knots. Max Speed 22 knots. This I assume is with the almost standard J & T 6/71NAs in the 38Cs I cannot get near these figures. It is quietly driving me nuts. The only thing I do well is gulp diesel fuel and never get far from base....but refueling is easy near a major port -- Jakarta Back to the Spec -- for Cruise 19 knots I anticipate this is @ 1800rpm. WOT 22 kn I guess also is @ 2300 rpm. I would appreciate anyone, who has good data in this area, to be kind enough to pass on to me their rpm / speed figures. Also their prop details - Number (3 or 4 ) and type of blades ( cup or plain ) pitch and diameter. Now to the question of power. Here in Indonesia we have diesel 2, not diesel 1 as in the US of A ( I think). To take care of the power deficiency I blew the engines fitting turbo's and inter-coolers. They are working fine but I see no performance improvement. I run with just the smallest, 'happy' wisp of white smoke.. The new engine config' According to the DD manual has at least the power of the original J & T Nas So next guesstimate is I have a prop problem... Thus if a splendid 38C owner is still able to run at the spec figures in para 1 above, I would dearly like to know his or her prop dimensions and speeds at different rpm -- clean ( or dirty) bottom -- from the boonies -- Cheers Ross
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