Thinking about getting the BMCL kit for my Prism2 early next year. Anyone switch to one? Any opinions?
WOB good or bad?
Does the wing push up against the CL restricting it?
Based on the testing that Hollis published the WOB of the 2019 P2 is functionally the same with FMCL or BMCL at 1.56 J/L at 75lpm on Air at 40m when Horizontal on the set and increasing for both FMCL and BMCL to 1.67J/L at 75lpm on Air at 40m when Vertical; with Hollis DSV. With Hollis BOV it increases to 1.90 J/L at 75lpm on Air at 40m when Horizontal; leading to a likely extrapolation of 2.0J/L - with the BOV fitted - when Vertical.
Clever observation about the wing, with it fouling the BMCL by design, as this was captured in their test reporting:
" QQ-1900385-HollisPrism-v1-1
1.3 Rear-mounted counterlung configuration
It was noted that the movement of the rear-mounted counterlungs during ventilation could be restricted by the position of the wing buoyancy compensator (WBC), particularly if inflated. It was also of concern that the function of the exhalation counterlung variable exhaust valve (VEV) could also be compromised.
Therefore, to ensure that any influence was kept to a minimum, the WBC was never inflated during testing."
Not seen reporting of the various changes made to CLs and fittings since Hollis published their 2019 QinetiQ testing so new units may differ but are unlikely to have lower WOB as they would have announced this.
For comparison the 2012 P2 tested with reference LSTF-0916-20120413_095648 had a WOB of 1.85 J/L at 75lpm on Air at 40m with DSV.