Originally Posted by
wrecker
The Spey 512W fitted to the HS Trident 2E had water injection.
Yes, on the Trident we only used water injection for take-off, 1st and 2nd segments so could use demineralised water, rather than water-methanol. One-Elevens could use water for Approach climb compliance so had to use methanol as anti-freeze to cope with the cold during cruise.