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SIGMA TANDEM SYSTEM OWNER’S MANUAL
11301 - 00.00.0000
Section 3: Instructor Techniques • Chapter 3 - Freefall / Drogue-Fall
E. Reserve initiation altitude is 2,500 AGL
For all the reasons mentioned above, do not delay the execution of reserve procedures. If the situation calls for it,
make a decision and carry it out. The following chart (Fig. 1) shows the difference between freefall and drogue fall.
Notice the increase in speed and the decrease in available time.
STABILITY CONTROL
A. Arch
B. Anticipation
C. Manipulation
A. Arch:
What the Tandem Instructor does is more important than what the student does. The Tandem Instructor should
concentrate on good training for the student in the proper body position, and then on his own body position on the
exit with focus on using the relative wind to achive instant stability. If the Tandem Instructor attains a good arch right
out the door, then chances are the pair will gain stability easily.
Incredibly enough, many instability problems are caused by a bad Tandem Instructor body position. Specifically,
many problems start because the Tandem Instructor fails to throw a hard arch on exit, and ignore the relative wind .
While a poor exit resulting in instability is not inherently dangerous (except when it leads to unstable drogue
deployment), it is nonetheless unnecessary and unacceptable. A poor exit is defined as any exit creating a combination
of uncontrolled loops or rolls immediately after exit. It is not acceptable to loop an AFF exit, nor is it acceptable to loop
an airplane on takeoff with a first time student, and Tandem is no different. While everyone will “blow” an exit every
now and then, it should be the rare exception, and not the norm.
Ironically, the smallest students can be the most difficult to control.
Example: When you hit a badminton birdie, the weighted end always ends up below. The same can hold with a
Tandem pair. If a large Tandem Instructor makes a poor exit with a small student, it is very possible for them to end up
back to earth (with the heavier of the pair below).
8,400 Ft.
(2,560m)
Droguefall
12,500 Ft.
(3,810m)
Freefall
Distance
Covered
In
50 seconds
Fig. 1
Summary of Contents for TANDEM VECTOR
Page 1: ......
Page 4: ......
Page 6: ...CHAPTER 1 THESIGMA TANDEMSYSTEM CHAPTER 1 THESIGMA TANDEMSYSTEM...
Page 11: ......
Page 12: ...CHAPTER 2 APPLICANT COURSE INFORMATION CHAPTER 2 APPLICANT COURSE INFORMATION...
Page 17: ......
Page 19: ...CHAPTER 1 DESCRIPTION CHAPTER 1 DESCRIPTION...
Page 31: ......
Page 32: ...CHAPTER 2 OPERATION CHAPTER 2 OPERATION...
Page 38: ......
Page 39: ...CHAPTER 3 RESERVE CONTAINER CHAPTER 3 RESERVE CONTAINER...
Page 71: ......
Page 72: ...CHAPTER 4 MAINCONTAINER CHAPTER 4 MAINCONTAINER...
Page 104: ......
Page 106: ...CHAPTER 1 PREPARATION CHAPTER 1 PREPARATION...
Page 114: ......
Page 115: ...CHAPTER 2 IN AIRCRAFT EXITS...
Page 118: ......
Page 119: ...CHAPTER 3 FREEFALL DROGUE FALL CHAPTER 3 FREEFALL DROGUE FALL...
Page 125: ......
Page 126: ...CHAPTER 4 CANOPY CONTROL CHAPTER 4 CANOPY CONTROL...
Page 130: ......
Page 132: ...CHAPTER 1 RESERVE PROCEDURES CHAPTER 1 RESERVE PROCEDURES...
Page 135: ......
Page 136: ...CHAPTER 2 AIRCRAFT EMERGENCIES STUDENT REFUSAL CHAPTER 2 AIRCRAFT EMERGENCIES STUDENT REFUSAL...
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Page 140: ...CHAPTER 3 FREEFALL CHAPTER 3 FREEFALL...
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Page 146: ...CHAPTER 4 CANOPY CONTROL CHAPTER 4 CANOPY CONTROL...
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Page 151: ...CHAPTER 1 STUDENTSKILLS FORFIRSTJUMP CHAPTER 1 STUDENTSKILLS FORFIRSTJUMP...
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Page 156: ...CHAPTER 2 OTHER ACTIVITIES CHAPTER 2 OTHER ACTIVITIES...
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Page 160: ...APPENDIX...
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