Manoeuvring trials full speed astern

Dear all,

I would like to test the manoeuvring characteristics of a boat fitted with 3 shaftlines while sailing astern. She has one rudder in way of each side shaftline.

I am thinking of doing 2 turning circles, full speed astern (one portside, one starboard side) with 1, 2 and then 3 shaftlines.

What do you think? Is there any other test that is interesting to perform astern?

Thanks in advance.

VM

 

I'm not sure what you want to check with that test. Could you explain, please?
There is a test that all regulations contemplate that is called "crash stop" : full speed ahead, full speed astern to check the time and distance that the boat runs until completely stopped.

 

Hi TANSL,

Sorry I wasn't very clear. We will do the usual manoeuvring tests such as the crash-stop and turning circles with the 3 shaftlines.

However, since she's the first of the series, I will be interested to spend additional time to get a better idea of how she manoeuvers and especially when going astern.

However, I can't find any specific test to be conducted while sailing astern hence my question.

Thanks

 

The trials program for a 63-meter naval combatant we recently completed included a "full speed astern" test. The test did not involve any of "our" equipment so I didn't pay it a lot of attention, but best I recall it was very simply a demonstration of the ability to maintain/steer a specified course, at full reverse power, for 30 minutes continuously.

 

Testing how she reverses with cross-winds will give you valuable data too. It is a very common maneuver for docking.

 

All tests should be performed following a specific protocol so that input data and outputs can be properly evaluated and compared with standard values. The test you propose, Gonzo, can be interesting. What is the protocol for this test?