Eads Eurocopter BO 105 CB-5 Flight Manual page 337

EUROCOPTER
D.5.3 MODIFIED FLIGHT PATH TO CLEAR HIGH OBSTACLES
D.5.3.1 Modified Takeoff Flight Path
Some heliports may require an increase in the standard TDP height due to obstacles in
close proximity of the site. For this purpose, the following procedure for varying the TDP
standard height is permissible.
Depending on the location of the obstacle relative to the heliport, two different procedures
have been established:
D.5.3.1.1 Distance From Heliport To Obstacle is Less Than the Takeoff Distance Required
(see Fig. D11)
Establish the TDP height such that the minimum height presented in Table D1 is not lower
than the obstacle height plus the minimum clearance as defined by operational rules.
EXAMPLE:
Determine:
Known:
Solution: 1. Add minimum clearance as defined by operational rules (e.g. 35 ft) to
2. Using Table D1, select for the derived minimum height (75 ft) the corre-
Fig. D11 Modified Flight Path to Clear High Obstacles
LBA APPROVED
Rev. 0
(see Fig. D11 and Table D1)
TDP height for Short Field takeoff
Obstacle height
Obstacle distance
known obstacle height (40 ft) to obtain minimum height for takeoff (75 ft).
sponding TDP height = 200 ft.
Section 11
FLIGHT MANUAL BO 105 CB-5/CBS-5
40 ft
200 m (in direction of departure)
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