Hamilton Jet HJ241, Manual

Page: 40 / 202

3.6
3 DESIGN BASICS
3.2 H
ULL
D
ESIGN
HJ-241 / HSRX
3.2.4 Trim Tabs
NOTE: Refer to “Precations Against Corrosion”
Section 4.1.4 if fitting stainless steel trim
tabs.
Trim tabs cannot be mounted directly alongside the
Jet Unit, as when moving astern, the reverse
waterjet will hit them and reduce reverse thrust.
It is possible to mount trim tabs under the Jet Unit
with control equipment on either side of the Jet Unit.
The adjacent diagram serves as a guide to the
maximum size of trim tab that may be located under
the Jet Unit. Contact C.W.F Hamilton & Co Ltd if
further details are required.
The Diagram shows the area within which the Trim
Tab must lie. From the maximum width "w" at the
Transom the area tapers inwards 25º per side until
it reaches the same width as the Reverse Duct
bottom corners.
Figure 13: Allowable Trim Tabs Location