Emergency Pump - Part 1

This blog covers the fabrication and installation of the emergency pump

Pump
The factory supply's a hand pump with the kit that is installed under the floor panel but there was an all aluminium pump in the cupboard. This is similar in design to one used in a Cessna Hydraulic Emergency Hand Pump. They are light and have an integrated handle but are expensive. This pump was produced for the White Lighting from memory but the Cessna pump would be lighter as it is all circular.

Installation

Bracket

A mounting bracket was fabricated from 2'' x 2'' x 1/8'' 2024-T3 aluminium angle and was selected as it would offer the necessary stiffness without a lot of additional reinforcing. It was lightened by drilling a lot of holes and at the was was about 100 grams [est].

The mounting points were marked off the pump with a 1/4'' transfer punch and then the profile shaped and lightened. 

Provision was made for mounting with 4 mm pop rivets to ensure a strong attachment to the top side of the wheel well. 

You do not want a pump moving about when in use as there would be enough pilot stress at having to use it.

Pump mounted to bracket
May shorten handle at a later time
Plumbing is still open 

Both mounting bolts are a AN4 with shear nuts to save a little weight.

Comments
The lower hole should have been tapped 1/4 x 28 tpi as it required a lot of grinding to remove the fillet to install a nut and the vertical lighting hole would be a little smaller but functionally it works well.