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Search: Posts Made By: Solandri
Forum: Gear & Maintenance   02-22-2015
Replies: 5
Views: 528
Posted By Solandri
Re: Solar panels on a radar pole?

How big are the panels? Stresses are higher in a cantilever (free-floating ends) than when both ends are supported. Stresses are much higher than if the panels are normally supported at multiple...
Forum: General Discussion (sailing related)   02-06-2015
Replies: 20
Views: 1,592
Posted By Solandri
Re: Mono hull to Cat

If you want an engineering answer. you don't need to hang rocks. You can just redistribute the weight, either concentrating it more towards the center or spreading it more towards the end.

Forum: General Discussion (sailing related)   09-08-2014
Replies: 19
Views: 1,896
Posted By Solandri
Re: Exceeding Hull Speed in Flat Water: Fantastic Sailing in Ideal Conditions

Hull speed isn't a "speed limit". When your boat moves through the water, the bow creates a standing wave (wave whose position doesn't not appear to move relative to your boat). As your boat moves...
Forum: Gear & Maintenance   09-05-2014
Replies: 79
Views: 6,052
Posted By Solandri
Re: Solar upgrade and energy questions... Help!

First, you're talking about amp-hours, not amps.

Amps is a measure of current.
Amp-hours is a measure of charge.
Amp-hours * Volts is a measure of energy.

If you talk about how many amps...
Forum: Gear & Maintenance   05-21-2014
Replies: 22
Views: 5,075
Posted By Solandri
Re: Best Cell Phone/Data Coverage East Coast, AT&T or Verizon??

Not exactly. 4g LTE supports a variety of formats, but most (including all the major carriers in the U.S.) are going with OFDMA. To explain how OFDMA works simply, each phone communicates on a set...
Forum: General Discussion (sailing related)   04-21-2014
Replies: 31
Views: 1,966
Posted By Solandri
Re: Go Green, Cruisers!!!

That's actually one of the best uses. Alkaline batteries suffer from depressed voltage under high current draw. That's what the "ultra" or "high power" alkalines are about. They don't store more...
Forum: Gear & Maintenance   04-04-2014
Replies: 300
Views: 13,379
Posted By Solandri
Re: safe cooking

Not gonna quote who I'm replying to, just gonna give the replies.

The reason propane is so popular is because it's a gas at room temperature but liquefies at a relatively low pressure (about...
Forum: Gear & Maintenance   11-14-2013
Replies: 27
Views: 11,551
Posted By Solandri
Re: Best way to soundproof engine compartment?

The lead/vinyl for the most part doesn't absorb the energy. Its purpose is to create a density change which reflects sound back into the engine compartment. Both density transitions (air to...
Forum: Boat Review and Purchase Forum   11-11-2013
Replies: 6
Views: 1,109
Posted By Solandri
Re: Sunk costs and boat purchasing

It's not really a sunk cost. A sunk cost is money which is unrecoverable regardless of which course of action you choose to take.

In this case, you lose the survey cost whether or not you choose...
Forum: Cruising & Liveaboard Forum   10-22-2013
Replies: 30
Views: 3,311
Posted By Solandri
Re: Galley Oven

I assumed any energy lost to transient heat while cooking (i.e. heating the air and your cabin instead of the food) would be the same for electric or propane. Since it scales the same for both types...
Forum: Cruising & Liveaboard Forum   10-21-2013
Replies: 30
Views: 3,311
Posted By Solandri
Re: Galley Oven

The problem with electric heat is that a gasoline generator is only about 30% efficient, a diesel generator about 40% efficient, and there are additional conversion losses if you use an inverter or a...
Forum: Gear & Maintenance   10-09-2013
Replies: 32
Views: 2,851
Posted By Solandri
Re: Which Smartphone for Sailing

That's not true at all.

The calculations to get an initial GPS position fix are very complex. If you had a dashbord GPS navigation unit from the mid-2000s, it took a minute or two to do those...
Forum: herSailNet   10-05-2013
Replies: 358
Views: 32,972
Posted By Solandri
Re: Is Sailing Sexist?

That's pretty much already happened. The defender's series for the 1995 America's cup had three contenders. One team, America3, had an all-female crew (with a male tactician). If I remember right,...
Forum: Cruising & Liveaboard Forum   10-03-2013
Replies: 30
Views: 3,311
Posted By Solandri
Re: Galley Oven

Propane is preferred because it liquifies under moderate pressure. This greatly reduces the pressure the tank needs to be designed to withstand - usually 200 psi or less (14 atmospheres or less).
Forum: General Discussion (sailing related)   10-03-2013
Replies: 33
Views: 2,122
Posted By Solandri
Re: Sunglasses suggestions

The phenomenon comes about because an LCD panel is itself a fixed polarizer sitting on top of a liquid crystal layer. The crystals polarize light as well, and their orientation can be controlled...
Forum: General Discussion (sailing related)   10-01-2013
Replies: 24
Views: 1,822
Posted By Solandri
Re: Whales don't like Red ?

Red vision is an adaptation among omnivores to easily pick out high-energy plant matter like fruits and berries. Herbivores are happy with grass, carnivores don't care for fruit. So plants make the...
Forum: Seamanship & Navigation   09-24-2013
Replies: 66
Views: 48,376
Posted By Solandri
Re: Dangers of LED navigation lights

Pardon this new member chiming in (I joined because I'm researching buying a sailboat and you have to sign in to search), but I'm a pretty big astronomy buff. I don't really understand the original...
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