3rd time asking-this is a calculus problem?

Question

I have asked for explanations and formuli and how you arrive at your solution[s].
NOT one person has worked this out--
they only indicate it sounds inefficient.
I am not interested in how something
sounds.
I am interested in scientific math;
algebra or calculus.
IF these things occurred, what would
be the scientific answer.
i gave specifics and I got back
maybe this and maybe that.
This won't work with that, period.
I need to know the why and why nots
analytically!
---
ship goes 16 kiilometers fast.
forget the size and length of the ship.
its top speed with diesel is 16.
NO other engines so far are faster.
------
it can add 3 other forms of propulsion;
sails, fans and photo cells.
if used alone they have specific
output speeds.
--
is there any combination or other
approach that will speed up the
ship [excluding jet propulsion] and
larger diesel engines?
[and keeping the weight the same].

Answer 1

The propellors driven by the diesel engines provide a thrust equal to the ship's drag at 16 km/hr.
Sails, fans and photocells are not forms of propulsion. A sail needs wind, a fan needs a power source to drive it, photocells alone just create a voltage. IF I assume that what you mean is a sail driven by wind, and a fan driven by some other power source, AND photocells driving something (unspecified by you),
THEN any or all of them will reduce the net thrust required to be supplied by the propellors, and the equilibrium speed will increase.
Your question does not lend itself to scientific analysis, only to qualitative analysis as I have stated. There are, however, other approaches. The most efficient is to reduce the drag of the ship by applying hydrodynamic boundary layer devices. These work so well they were banned from Olympic racing shells some time back.

Answer 2

so you could have other engines to compliment the speed of the diesels to obtain a higher speed right ? The additional power could be negative or positive. In the case of sails, it could add speed or reduce speed in the case of drag.

Are we allowed to think laterally ? How about having the sails or solar power lift the ship out of the water ? Reduce drag and allow the diesels to give a faster speed.

Answer 3

you mean 16kilometer per hour correct?

your problem is the other forms of propulsion with not work in conjunction with the diesel motor. kinda like when you and your partner are trying to spin a jump rope but you are not in sync. If your not in sync, then the rope just shakes around a bit and your better off with just tying one end of the rope to a tree and one person controlling the rope.

in your example, the "sail" will retard the motion and act as a sea anchor for wind speeds less than 16kmph. for wind speeds greater than 16kmph the prop on the diesel will be drag on the sails, ... thats the idea.

Answer 4

Decreasing the drag coefficient of the ship's hull will give it a higher top speed, as well as increasing the efficiency of the diesel engines.