Hi Vince: Good questions.
Normal operation with 2 engines at 1600 rpm. average speed 7.5kts. fuel
usage 3.12gph
Single engine operation. 1700-1750rpm. average speed 6.5kts. fuel 2.65gph.
helm adjustment 5-7 degrees. The unused shaft is NOT locked. BW trannies can
operate in this mode at these rpms.(emphasized in their manual.) Remember we
are only in this mode for 6hrs. We did experiment during our training trials on
locking the shaft but quickly came to the conclusion that this was a
dangerous procedure in case you forgot to unlock it. The KISS principle works very
well. Hope this answers your questions. Regards. Leonard Stern, Indifference
At 12:39 PM 12/18/04 -0500, you wrote:
this mode at these rpms.(emphasized in their manual.) Remember we are only
in this mode for 6hrs. We did experiment during our training trials on
locking the shaft but quickly came to the conclusion that this was a
dangerous procedure in case you forgot to unlock it. The KISS principle
works very well. Hope this answers your questions. Regards. Leonard Stern,
Indifference
The free wheeling of a prop shaft had a good thrashing on the Trawlering
forum about a year ago, should be in the archives.
One time we wanted to prevent the shaft from turning. Just wrapped a 3/4
inch nylon line around the coupling and tied it down. The shaft just
rotated until the line came taut and it was strong enough to not break. Be
careful what you tie the line to.
Mike
Capt. Mike Maurice
Tualatin(Portland), Oregon