It's crunch time for the Oranges. They have to win the next 2 challenges to tie the series and save face. This week's challenge has the teams building a boat that will transport each teammember, one at a time, from an island to a floating dock. The first team to transport all 3 'castaways' to the home base, wins.

The Oranges will be undertaking a catamaran design. A motor will drive a propeller that will push them through the water. The propeller pulls water towards it and pushes it out the back, giving it forward movement. A catamaran is a boat with 2 pontoons and a deck connecting the two which gives the "crew" a place to stand.

The Yellows were going to make a boat and prop but decided to keep only the boat. Their propulsion system will come from a jet ski. A pump pulls water into a pipe and through a propeller which flings the water out the back through an "exhaust pipe". It's a fast system but tricky to build.
 
 
 

The Yellow Expert Lawrence Newing	The Orange Expert Richard Yemm
Let's play... Pick!  Your!  Prop!	That is a large engine Yellow...
For finding a propeller, Dave gets a kiss	Our judge is Tim Barkley
This jetski half will provide the VROOM for their boat	One of two pontoons for Orange
Robert & the judge play with their bath toys	Shen shows why he is a cut above the rest
The Yellows do some engine attachment	A rudder built from a bicycle handlebar and a piece of wood
Dick does an impression of Nurse Ratchet	Is there supposed to be water in the boat?