Jim Nolan P(N)-19 P-15 L138T LGYC #6
-----Original Message-----
From: Thos. Westerman <thomasw@vanion.com>
To: nolan_laboratories@email.msn.com <nolan_laboratories@email.msn.com>
Cc: potter mail list <wwpotter@tscnet.com>
Date: Monday, August 16, 1999 11:04 AM
Subject: Potters and high altitude
>>As far as altitude, I haven't sailed below 5200 feet elevation and the
>>practice pond out front is at 9000 feet elevation. Since it is closer to
the
>>jetstream you can sail faster.
>
>You forgot to mention effects of the altitude vis a vie: Lower air
>density. Of course we all know that with lower air pressure we have less
>resistance against the hull-an advantage. However one must also factor in
>the cooler temperature at higher elevation and the resulting densification
>of the air due to temperature, counteracting the low air pressure. Third,
>since air movement is essential to the propulsion system of your potter, we
>must factor the advantage that we gain in low air pressure/density against
>the hull (advantage) with the lower density/pressure of the air movement
>against the sails (propulsion system) (disadvantage). Seems they may
>cancel each other out.
>
>Certainly our gasoline powered motors are less efficient too due to the
>lower air density, thus less availability of O2 per intake to mix with the
>fuel for combustion.
>
>Dont even get me started on the UV rays thing. With less atmosphere (and
>in most cases smog too) to filter out those damaging little rays, items
>susceptible to UV damage (sailcloth, ropelines, wood, etc. including
>captain's epidermal tissue) wont last as long as might be possible in the
>low lands due to higher UV exposure/dosing. But at least we dont have to
>subject our precious equipment to that other menace--high concentration
>chemical salts ion attack.
>
>Were talkin high altitude potters here. Remember also, the self inflating
>type V life jackets work better up here and fill faster and more firmly
>than for our counterparts jackets do "down in the lowly lowlands"
>
>Thomas Westerman
>P19 #578
>Colorado Springs (6000 feet) (that's a mile plus an extra 1000 for safety
>or good luck, which ever comes first)
>