Re: "crash back" - "all back emergency" & full astern trials
Posted: Tue Sep 22, 2020 12:40 am
Crash Astern = Royal Navy terminology
Andrew Watkis @AndrewWatkis
I've been at sea for a short while again. I thought I might explain what we've been up to in @HMSQNLZ
1/
7:31 am · 18 Sep 2020
Andrew Watkis @AndrewWatkis ·18 Sep
Replying to
@AndrewWatkis
Following summer leave and a bit of maintenance the ship has proceeded to sea for a RTP and SPA, or Recovery and Trials Period and Ship's Performance Assessment 2/
Andrew Watkis @AndrewWatkis·18 Sep
The RTP is a bit like taking your car out for a quick spin when you get it back from the garage, checking it all still works and has been put back together properly. It might include some specific trials following repairs or newly fitted equipment 3/
................... tweet No 5/reads:-
Andrew Watkis @AndrewWatkis · 18 Sep
Normally that would be it, and head back home or out on task, but we have also been undertaking a Ship's Performance Assessment. This is a much, much more intensive set of trials normally overseen by the RN's Machinery Trials and Commissioning Agency, MCTA 5/
.................. tweet No 7/ reads:-
Andrew Watkis @AndrewWatkis ·18 Sep
For Marine Engineers, the highlight is the PPA, Power Performance Assessment. This is a comprehensive test of the propulsion system, a thorough work out. Every class is different in detail, but it broadly looks the same 7/
Andrew Watkis @AndrewWatkis · 18 Sep
It includes timing from stationary to top speed, measuring handling at top speed, timing a crash astern (top speed to backwards) and an extended full power trial to thoroughly test the plant. Acres of readings are taken, but it is all digitally recorded now 8/
Thommo @Thommo_Says · 18 Sep
Replying to @AndrewWatkis and @HMSQNLZ
As a YO I stood on the flight deck of a 22 as we did a crash astern during BOST. Amazing sight!
And yes, for some of my followers that was a sea dit- I don’t have many but those I do are good!
Andrew Watkis @AndrewWatkis
I've been at sea for a short while again. I thought I might explain what we've been up to in @HMSQNLZ
1/
7:31 am · 18 Sep 2020
Andrew Watkis @AndrewWatkis ·18 Sep
Replying to
@AndrewWatkis
Following summer leave and a bit of maintenance the ship has proceeded to sea for a RTP and SPA, or Recovery and Trials Period and Ship's Performance Assessment 2/
Andrew Watkis @AndrewWatkis·18 Sep
The RTP is a bit like taking your car out for a quick spin when you get it back from the garage, checking it all still works and has been put back together properly. It might include some specific trials following repairs or newly fitted equipment 3/
................... tweet No 5/reads:-
Andrew Watkis @AndrewWatkis · 18 Sep
Normally that would be it, and head back home or out on task, but we have also been undertaking a Ship's Performance Assessment. This is a much, much more intensive set of trials normally overseen by the RN's Machinery Trials and Commissioning Agency, MCTA 5/
.................. tweet No 7/ reads:-
Andrew Watkis @AndrewWatkis ·18 Sep
For Marine Engineers, the highlight is the PPA, Power Performance Assessment. This is a comprehensive test of the propulsion system, a thorough work out. Every class is different in detail, but it broadly looks the same 7/
Andrew Watkis @AndrewWatkis · 18 Sep
It includes timing from stationary to top speed, measuring handling at top speed, timing a crash astern (top speed to backwards) and an extended full power trial to thoroughly test the plant. Acres of readings are taken, but it is all digitally recorded now 8/
Thommo @Thommo_Says · 18 Sep
Replying to @AndrewWatkis and @HMSQNLZ
As a YO I stood on the flight deck of a 22 as we did a crash astern during BOST. Amazing sight!
And yes, for some of my followers that was a sea dit- I don’t have many but those I do are good!