Debbie, I have no memory of anything which might have happened at Bald Mountain (not Kamas). If I did, I would deny it. But if anything DID happen, it was purely intentional. (I only caught the Frisbee twice, and I never did see the sun's projected image.) Acutally, the amount of heat per unit area generated is proportional to the inverse of the f ratio squared of the scope, not the aperture. My 22" is an f6.3. An f4.5 would put more heat in a smaller spot. Brent --- Debbie <astrodeb@earthlink.net> wrote:
That is another reason I don't like to leave my scope up during the daytime, besides animals getting to it. A big dobsonian could cause a forest fire or blind someone.
Debbie
[Original Message] From: Patrick Wiggins <paw@trilobyte.net> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Date: 9/28/2004 11:10:18 AM Subject: [Utah-astronomy] Re: Star party etiquette forcrumbcrunchersandparents
I seem to remember many years back a star party up by Kamas where Brent's monster scope ended up catching a frisbee or two. But then I seem to also remember that later in the day the scope became a chimney when sunlight found its way to the primary mirror and smoke was seen emanating from the tube...
Patrick
Chuck Hards wrote:
Don't be so sure; I've seen many telescopes
(present
company excepted, of course) that may as well have been trash-cans...
--- John and Lisa Zeigler <john@johnstelescopes.com> >
Solid tube Newtonian telescopes, no matter how much they look like
trash cans or basket ball hoops are not for throwing things into..
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