The FEI also does not allow the Dr. Bristol. Both Dressage and Eventing disciplines allow the Dr Bristol in our U.S. national competitions My suggestion is that for USEF National Eventing Competitions we accept the same bits that USEF National Dressage competitions do in the interest of keeping it simple.
Percussion Instruments. Bass Drum - The bass drum is a percussion instrument and is the lowest and largest member of the drum family. Bass drums are used in orchestral music as well as marching bands. Cymbals - Percussions are music instruments that are either struck, shaken or scraped and may or may not have pitch. Cymbals are a perfect example of a non-pitched percussion instrument. The type that is used in marching bands is called crash cymbals.
Marching bands typically consist of several musicians marching and playing different instruments at the same time. Most marching bands have some type of percussion instruments. This section of the marching band is sometimes known as the drum line or the battery. Bass drums are some of the most common and easily recognized types of marching percussion instruments. These are often the largest of the percussion instruments in a marching band. They are typically around 14 inches (35.6 centimeters) deep and up to 36 inches (91.4 centimeters) in diameter.