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Dishpet said..pcw said..Windbot said..LeeD said..
Bottom plate is a +.
Yup as long as the system has a big enough bottom plate I wouldn't hesitate, the risk is worth the reward. I have regular Tuttle box board with a PowerPlate it does a great job distributing the load, so far my board has been great and I'm well through the initial trial stages. I think there will always be some element of risk the first few times you go with a foil in a board not specifically designed for it. I've heard of a foil breaking a freestyle board in two, but the failure was between the front and back straps and not at the finbox, implying the board's overall construction was too light. In general I've heard more good stories than bad with boards that pre-date foil-reinforced boxes.
Good luck Dishpet!
Yes if the bottom plate is large enough, should be OK. I had an RRD WH with a good bottom plate, for 9 months and 40 + sessions on two un-reinforced boards, a 124 isonic and an old 147 ultrasonic, no problems. Sure it had a short Tuttle fitting, but much of the load seems to go on the front edge of the bottom plate. I didn't used to, but have taken to using a leash on my SB Race, after reading the doomsayers comments ?? on seabreeze. A flat webbing strap that goes under the rear screw washer and to a footstrap screw.
I think the NP power box fitting has a larger sized screw than normal. As the power box is a more wedge type fitting I guess you would need to be sure the plate is bearing properly on the underside of the board.
Thanks for the informative reply, how would you describe the difference between the sb and rrd foils ? A what about the width between the two starboards?
First it's probably not fair to compare the SB Race directly with the RRD WH. The SB Race costs twice as much. However, I think the RRD WH is a good foil especially for flat water. It flies slower (and lifts off a bit earlier) than the SB Race and is not as secure downwind in chop or swell, lacking stiffness in the fuse perhaps and the longer mast. Upwind it can point as high as the SB Race, but not as fast. There is a RRD WH foil review on windsurf.co.uk and if you sail lakes, rivers or off shore winds, and you need to fit it to any board the RRD is great. It even fits the 4 screws of a Naish Hover board. It is a front footed foil, so need those footstraps well forward. Seems to work best with medium, say 85cm width boards and mid size sails (6 to 7m) like in the RRD promo videos.
The NP Glide, I have only sailed with a guy who had one, he found the foil easier than the 2018 NP alloy but the 70cm mast a bit limiting. Obviously a less performance oriented foil than the RRD WH.
The isonic I used was 85cm wide and I needed to sail front foot forward of the footstrap downwind. The 2013 year ultrasonic is 93cm wide and foot straps were all good. Good luck.