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KB2VXA > INFO 18.07.02 02:47l 52 Lines 2076 Bytes #999 (0) @ WW
BID : 51998_WT3V
Read: DB0FHN GUEST
Subj: Re: VK3ABK > ISS & HELIUM
Path: DB0FHN<DB0ZWI<DB0HDF<DB0ERF<DB0MRW<OK0PPL<RZ6HXA<SP7MGD<WB0TAX<N7FSP<
KB6LE<KB6LE<W0RLI<KA7AGH<N7QDN<N7QDN<K1UOL<K1UOL<WA2PNU<KC2COJ<WT3V
Sent: 020717/0312Z @:WT3V.#JS.NJ.USA.NOAM #:51998 [Lakehurst] $:51998_WT3V
From: KB2VXA@WT3V.#JS.NJ.USA.NOAM
To : INFO@WW
Hello Dick and helium breathers,
Have you ever wondered why the voices on your 2M radio coming from space
sound so strange? Well, it's the ame thing that keeps all satellites in
orbit, HELIUM! Get one of those child's ballons, inhale the gas and
speak, you will sound like a cross between Donald Duck and Chip and Dale!
Seriously, I don't know the formula representing the orbital velocity vs
neutral gravity and wouldn't want to bore you with it anyway. Helium will
do.
Speaking of which, high altitude balloons can only go as high as the
density of the atmosphere permits just like a jar filled with air can
only rise to the surface of the pond. Gee, I knew that!
OK, the trolley. You are the first I have read on packet (the first was
by e-mail) who answered correctly, sort of. While the trolley (wheel)
contacts the wire, a pantograph has a contact "shoe" much like the one
used on third rail systems, only larger. The term "trolley" hasn't
mutated one bit, it still refers to any grooved wheel running the length
of a cable. Suspended tram cars run on trolleys and so does the YL's bag
of clothespins as she's hanging the wash out to dry.
I don't know how an electric streetcar became a trolley, they were called
that when horses pulled them! Today, even in the US they are known as
"trams", although few are left having trolley poles, they have
pantographs like most others worldwide.
FYI, even on heavy rail, the "wire" the pantograph shoe contacts is
called the trolley although it has a flat underside, unlike the round one
the streetcars used. The actual current carrying conductor just above the
trolley is the runner and the catenary supports them by stringers.
Railroaders simply call the whole thing the catenary.
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LID: Wants to work ground wave, buries antenna.
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73 de Warren, KB2VXA
e-mail: kb2vxa@juno.com
Message timed: 03:14 on 17 Jul 02 UTC
[ Received via HF CLOVER at KB6LE ]
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