lotus



previous page: 8.2 Free Flight Boost and Rocket Gliders
  
page up: Model Rockets FAQ
  
next page: 8.2.2 What are some types of gliders?

8.2.1 What is the difference between a Boost/Glider and a Rocket/Glider?




Description

This article is from the Model Rockets FAQ, by Wolfram von Kiparski with numerous contributions by others.

8.2.1 What is the difference between a Boost/Glider and a Rocket/Glider?

In a Boost/Glider (referred to as a BG in the rest of the
FAQ), only a portion of the rocket as launched is required to
come down gliding. In a Rocket/Glider (RG), the entire model
remains in one piece, and the whole model glides down. BGs can
be higher performance because they do not have to carry the
dead weight of the motor while gliding down. But sometimes
that extra mass is helpful in trimming the model, and RGs have
the advantage of not having to chase multiple
pieces. Typically, this distinction is only important in NAR
competition, where these two classes are distinguished. An RG
is a legal entry in BG events, but a BG is not a legal entry
in RG events.

The other thing to distinguish is a philosophical distinction
between a BOOST/glider and a boost/GLIDER. The question is
which half of the flight the emphasis is on. A BOOST/glider is
a rocket that happens to have glide recovery. In reality, it
probably doesn't glide that well. The Space Shuttle and Tomcat
kits are good examples of this type of glider. A boost/GLIDER
on the other hand is a high performance glider that is carried
aloft by a rocket motor. These are the type of models
typically seen in competition, and the topic of most of this
FAQ.

Also note that regardless of the emphasis, all of these
gliders are launched within 30 degrees of vertical, like all
other model rockets. Horizontal launch and shallow climbing
supported by wing lift doesn't work for these models, and is
prohibited by the safety code.

 

Continue to:















TOP
previous page: 8.2 Free Flight Boost and Rocket Gliders
  
page up: Model Rockets FAQ
  
next page: 8.2.2 What are some types of gliders?