The early manufactured P19's did not have a sub-deck in them ... The bridle attachment angles on the standard P19 was 45' .... this makes the engineering calculations really easy ...

Forestay Load X (cos 45')= load (in X axis) "vertical axis"
Forestay Load X (sin 45')= load (in Y axis) "horizontal axis"
ex: Forstay load= 1000lbs Cos45'=.5 sin45'=.5

Therefore Load Y =500lbs

Now I had repaired several P19's for some of my friends that had developed ripples/waves just in front of the frontcrossbar on the inside from what I believed to be horizontal loading of the hulls. Therefore when I converted my P19 to a MX rig I installed a N6.0NA bowfoil that changed the bridle attachment angle from 45's to 15's ... this GREATLY reduced the horizontal loading. The boat is much stiffer and does not "paddle foot" over waves but drives straight through. The "issue" is that w/ the bowfoil you must carry the spin-pole fairly low. I haven't scooped any waves (yet) but I have limited visiblity to leeward w/ the chute up. Combined w/ no snuffer system (yet) I use the boat w/ spin for "Distance" races and not "Bouys" races.

For bouy races I race her as a "sloop" rig w/ the bowfoil, this allows me to have higher mainsheet tension so that I can control the MX Squaretop Mainsail w/ a 8x1 mainsheet stack ..... No ripples yet on the inner bows!!!!

To make room w/ the bowfoil for the "MX" jib's hoist hieght I had Randy Smythe make the my jib 5" shorter of the standard MX on the luff length. It has worked out well and I still have my "downhaul" on my jib to adjust my luff tension "on the water" also.

Please note that my spinpole is a carbon fiber windsurfer mast, w/ 6" of prebend. I could use a straight 2" aluminum tube and adjust my spin bail up the mast, maybe gaining some visiblity ... but when the boat is heeled over I don't think I will really gain that much visiblity and I just don't like the visual of a 2" aluminum tube sticking out in front .... IT LOOKS LIKE SOME MAD PLUMBING JOB GONE WRONG !!!!

Sail Flat, Sail Fast, Sail Safe
Harry Murphey
TheMightyHobie18/#9458, Fleet54/Div11
P19MX/#86, CRAC