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SkyMan last won the day on November 11 2013

SkyMan had the most liked content!

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13,284 Really bored when not online.

About SkyMan

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  1. Ok, probably a brand name but at least I have something to go on now. Thanks. Looks like it's used mostly for suspending plumbing and cables. Maybe Tristar would have it.
  2. I think this thread is missing the point though. It's not the 20 or 30 somethings that look 16 that get guys in trouble, well, jail trouble anyway. It's the other way around.
  3. It's close to this: That's a pocket door rail. What I'm looking for is heavier steel and instead of the single hole on top, the whole side has a line of holes down the center.
  4. I vote yes to old jeep phase out.
  5. I'm looking for a particular steel (might also come in aluminum) product but know that without a "sample" I'm going to be pretty much SOL finding it here without knowing the real name of it or at least having a picture. So I think if I describe it here maybe someone will known the name or perhaps a brand name or something. Here goes... Take a piece of heavy gauge 1.25" square bar. Remove about a 3/4" wide strip from the middle of one side and curl the 2 cut edges back towards the opposite side. Then down the opposite side put a line of say 3/8" holes all the way down. Maybe every 5th hole is a double so it's like 3/8"X3/4" slot. I thought this was called speed bar or rack bar or something like that but Google isn't helping. What's it called?
  6. Yea, Feb 1 to Apr 1 would still be inside 3 years but only by 3 days. I assume you went for this extension the end of last month? I believe on tourist visa you're required to apply for an exit clearance at least 7 days before flight. So if you extended to April 1st you'd be inside that 7 days. You could technically have had a flight out on April 4th and could have then got your 2 month extension. However, you would have then had to go back before the end of March to get your exit clearance and another 1 month extension. Best to get a flight out on or before April 1st (before to be safe), then go get a 1 month extension and exit clearance before the end of February.
  7. Right, which is why a typical US or European tracker setup won't work right here. Well, above the tropics, the E-W tracking is done by rotating the unit clockwise (maybe ~150 deg) and the inclination is set by tipping the panels back (0 - < 90 deg). Here that works through the winter until the Equinox when that system would get confused. The E-W actuator would want to follow the sun to the north but already be at the limit of it's travel so the N-S tracker would follow the sun by tipping back until noon but then it would be at the far end of it's travel. So my solution is to track E-W on a horizontal axis aligned with Polaris and declined 13.1 deg to the north from level. The E-W actuator would rotate the unit over the top, east to west. The inclination would be the zero position for the N-S tracker and correspond to solar tracking on 21 June. As the sun tracks south into the winter the N-S actuator would tip the panels up to horizontal and then up to 33.9 degrees for a total angle change of ~47 deg. I think if the angle of the (semi) horizontal axis is perfect, the N-S actuator would do nothing all day except for a sunrise correction under normal circumstances. It may be cheaper and easier to just cover the roof with panels but this is cooler and I think a fun project. And I get a functional sundial in my yard. I also found a cool thing that the lot line on the north side of my (where the tracker is going) lot is almost exactly lined up with the setting sun on 21 June. My current single panel is working just by laying on top of my dog kennel roof which pitched a bit south. I'll have to move it to the north side in a few months when the eaves of my house start blocking it. It's grid tied on a microinverter and will probably do the same with 3 more panels on the tracker. I plan to build the tracker to handle eventually 6 panels but perhaps going off grid with 2 additional panels.
  8. I think I'm going to go with the cheap actuators just get to work out any bugs. Then if they fail I can go with the strong ones. I normally go for better quality for less problems later but the cost difference is so high on these...
  9. Solar panels are fairly light but seem fairly strong. On a roof, no problem with wind but on a tracker I wonder about wind damage. If a panel was supported by steel braces across the back at say 25% and 75% of the height of the panel and standing up at 90 degrees awaiting the rising sun and a strong wind came from the east, would that be a problem for the panel or more the problem for whatever it's mounted on? The reason I'm asking is partly due to the strength of the actuators used to move the panels. There are fairly cheap actuators (~$30) with 300+ lift force and then some with as high as 7000lb force for like $250. The tracking system should be balance so the panels can be moved around with one finger without the actuators attached so the only reason I can see for high strength is if it is fighting wind. The other reason is because some tracking controllers have a wind speed input so you can park the panels at a safe angle in high winds but I wonder if that's due more to having weak actuators than the panels themselves?
  10. Me thinks some senator got stuck behind someone txting at a light.
  11. The 24 or 48 hours starts when you buy it right? Or can you state the day you want it to be valid? If you can buy it, get through the embassy and then depart the US in the validity period it might work. Actually, you'd have to get through the embassy and then into the Phils before it expires to be safe. That might be tough for some.
  12. But it's only real for 24 hours, right? To get the 9A you have to mail or go to the embassy and have your itinerary. So if you lived near an embassy I suppose you could go to the embassy in the morning and fly out in the afternoon.
  13. You should call and say, "Are you the guy with my $11.3M?
  14. Good reason to get a 9A before you leave then. Part of the 9A app is to provide your itinerary. So you still have to have an onward ticket but then it's all approved and you're ready to go. Don't know if the embassy would accept a flyonward ticket though.