Quote:
|
Originally Posted by seafarer
Quote:
|
Originally Posted by Klaus_Doldinger
Quote:
|
Originally Posted by U-96
Keep bernard off of your boat or else you'll end up with a boat with less range then a Canoe.
|
But... (I´m mechanics incompetent), how it is possible that you get more range at higher speeds, you know, 7-9 knots being a suggested speed instead of 3-5 knots?
(As a seasoned VIIB-C Kaleun travelling not further from Iceland, fuel is not a problem for me) |
Slower speed may slightly reduce the fuel consumed per unit time, but it will take much longer to cover a given distance, and so you burn more fuel over that time. If the speed is too high, the resistance of the water makes fuel consumption per unit time increase rapidly with increasing speed. You cover the distance in less time, but burn much more fuel per unit time, so total fuel consumption is again high. There is some optimal speed inbetween - see http://www.ussmissouri.com/speedVSFuel.aspx
P.S. and I have no idea how accurate or universal this is, but I always thought that the power needed to drive a ship (roughly) varies as the cube of velocity. So to go from 5 to 8 knots would require about 4.1x the power, but to go from 5 to 17 knots would take more than 39x the power. Or, something like that...what do I know. Damnit Jim, I'm a marine biologist not an engineer. |
For me you´re an engineer. I´m only a ********** lawyer. Thank you!
__________________
OL zS. Siegfried Rollmann, U 108 in WaW IV, 6th war patrol with GWX 3.0 Gold (111.829 BRT)
Lt zS Klaus Doldinger (U 36), 4th war patrol with GWX 3.0 Gold (50.713 BRT)
SH3 Cmdr 3.1
GWX 3.0
GWX 16 Km atmosphere
GWX no medals on crew
GWX open hatch
GWX Saint Nazaire, Schleuse and units
OLC GUI 1.2.7
Thomsen´s sound
Torpedo damage final
Rubini´s lifeboats and debris
D.i.D.
|