I must stress here that the commentary is not provided by me - honest.
Yes they do launch with the power on. We could hear them warming the engines for a little while before the launch and they came down with them on what sounded like full power.
HI
Yes. the engines are running and in gear too....... we had the same sort of liferboat here in Port Erin some yeas ago, and it was launched every Lifeboat day... huge crowds,,,, couple of maroons.... bang bang....minutes later.... off she'd go... just like that. Getting her back up the ramp was another thing,. huge winch in the house and dragged back up stern first. But now......... they took ours away as there are one in Port St Mary that has to live on the water as the old house is too small.. and another in Peel that has to be launched stern first into the harbour from a tractor driven trolley.. and that takes some time to do....great shame really.... the inshore RIB thingy they have here now is a very poor comparison IMHO. and it goes down the ramp SLLOOWWLLYY ... then blasts off
Engines have built in heaters so they are already warm before start up, so you can give it full monty on the way down the slip.
Getting it back onto the slip is another matter and really tests the skill of the coxswain, you are trying to get 8" of keel onto 16" of keelway, usually in a bloody big swell if its been a rough call out, you cant see the stern of the boat and often its pitch black. Having said that you get some guys just hammer it onto the slip and hope it bounces in, the experienced bods are much more sedate and tickle the controls in and out and bumpity bump in she goes, our old cox could put her in from the helm inside totally blind with just the harbour walls for reference, he was just amazing to watch, pure skill and experience, seen him hold her off a casuality three to four feet in an awful nasty blow, the kind of weather that has you absolutely knackered from holding on, just excellent stuff.
I used to watch the Penlee lifeboat from my house. After the disaster and upgrading to a larger craft it is kept in Newlyn harbour. Never saw it dragged back up the ramp very often as it used to return back to the harbour until daylight or when the sea moderated. Definitely worth a visit to the old boathouse at Penlee Point which is kept up as a memorial to those brave soles that lost their lives in that awful storm.