This article is from the Roller Coaster FAQ, by Geoff Allen geoff@eecs.wsu.edu with numerous contributions by others.
General Public
Literally refers to the non-enthusiasts who attend a park. The term is
used to connote those park patrons who like their roller coasters a
little (or a lot) less wild than the average enthusiast does.
Gully Coaster
A coaster that makes use of the natural terrain and gives an added
feeling of speed by keeping the track close to the ground through the
ups and downs.
[Images: BEASTPC.GIF]
Heartline Coaster
TOGO's steel coaster in which the center of gravity is designed around
the riders "Heartline". Formerly referred to as the "MEGA Coaster",
TOGO's Heartline Coaster contains drops and inversions very similar to
Arrow's <<Pipeline>> coaster, but its trains ride on top of the rails as
opposed to between them.
Heartline Flip
An element on B&M <<Inverted>> coasters which rotates the train in a
very small diameter corkscrew, producing a rotation about the rider's
"heartline". This is very similar to a barrel roll or B&M's "Camel
Back" inversion.
Helix
Corkscrew-shaped loops on either a vertical or horizontal plane. The
usual meaning is of spiral turns either descending (like going down the
bathtub drain) or ascending.
[Images: WILDONE5.GIF]
Hump
Sometimes used in reference to a coaster hill.
Immelman Loop
B&M's term for their "Diving Loop" as used on their <<Inverted>>
coasters. This new element is named after the German stunt pilot whos
famous air acrobatics inspired this coaster maneuver.
Incline Loop
B&M's new twist on a vertical loop, which is angled at a 45 degree
elevation. This is one-half of B & M's "Batwing" element.
Inversion
Any part of a steel roller coaster <<circuit>> that turns you upside
down.
[Images: DRACHEN3.GIF and many others]
Inverted
A coaster that rides below the track rather than on the track. The cars
on this type of coaster are rigidly connected to their wheel assembly
(Compare with <<Suspended>>).
[Images: BATMAN01-05.GIF, GADVBAT1-6.GIF, TOPGUN01-03.GIF]
Interlocking Loop
Two <<vertical loops>> that intertwine like two links on a chain. An
example would be the two loops on the Loch Ness Monster at Busch Gardens
in Williamsburg, Virginia.
[Images: NESSC01.GIF]
Lateral Gravity
Those forces which pull you to the side of the car (or slam you, as the
case may be), often found on <<flat turns>>, and often eliminated with
<<banked turns>> (especially on newer roller coasters).
Loading Platform
Portion of the station where passengers board the coaster trains.
[Images: CYCSTAT.GIF]
Long Line
3600 people waiting in front of you to ride a coaster!
[Images: MSTREAKC.GIF, TOPGUN01.GIF]
 
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