Can a displacement hull plane? Whilst racing multihulls I heard people saying they were planing but I think it's impossible for such a narrow hull to plane. As I understand it a hull has to overtake it's own bow wave in order to plane. I've never seen or raced a multihull which has produced a significant bow wave, what I have felt is the hull and rig working in perfect balance and trim producing light sheet loads and increased speeds, a semantic planing feel perhaps?
Primer has been designed with a wetted hull shape which I hope will promote planing (if possible) or failing true planing a hull that can accelerate to relevant wind/hull speed and retain this velocity for maximum durations.
(max hull speed in displacement mode is the square root of LWL in feet x 1.34 = 2.41 knots for Primer)
Due to a very slight lack of overall buoyancy this particular hull may fail to achieve the above goals but everything learnt form Primer will be worked upon and improved in the MK II Primer or 'Rebound'. Mind you the buoyancy mistake could prove beneficial, when most IOM designs are heeled over you'll notice their bows are no longer in the water, their LWL is shorter and therefore max hull speed is reduced.
The picture below shows Primer on the verge or maybe planing in the true sense of the word! The bow which is normally 10mm under the waterline is now at surface level, the bow wave is moving aft and the rear of the hull appears to be floating on the waters surface and not ploughing a 4kg channel through the water. There's not a bad wake either!