RR, "its like 3 panels per HP at best,
12 HP 36 panels, no reserve"
yep, 750 watts per hp, the batteries alone might sink the boat. . . So 72 panels to power the boat in the sunshine and 144 panels to charge the batteries for low light and night time.
There is a reason Google abandoned their multibillion dollar solar project in Nevada and are trying to stick the taxpayers with the bill.
RR, "Im starting from 2x straight chord wings with no taper AR perhaps as low as 6
box spar with the bearings arranged within the wing on a shaft protruding out of the boat deckI think it makes a decent cantilever this way, but it means the shaft is more critical and has less diameter available for bearings"
We are looking at 20k to 30k lbs of force (torque) at the base of the mast. The problem is distributing the force, flexing will bind the shaft. I think the best solution is a spherical roller bearing at the top and a couple of needle bearings along the shaft.
The problem is the tolerance required, maintenance issues, cost, etc. it seems to require custom made bearings too.
I would like to use UHDPE but it has binding and sticky issues as well as wear issues, salt crystals could be an issue too. On the other hand if properly designed it could be easy to replace and maintain the system and it may be very durable and reliable. These kinds of bearings seem to be common for big boat propellors, but I don't think they have the same side loading. . .
Does anyone know if multiple layers of UHDPE would work in the the bearing surfaces? It would solve a lot of tolerance issues (adjustable thickness).
Talador
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Posted by: taladorwood@yahoo.com.au
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