Visit Your Local PBS Station PBS Home PBS Home Programs A-Z TV Schedules Watch Video Donate Shop PBS Search PBS
Rough Science Photo of the Rough Science cast
 Home | Death Valley | Scientists | Jonathan | Rocket Diary - Day 2
Introduction
 
Series 4:
Death Valley
Rover
Communication
Spacesuit
Impact
Aerial Surveyor
Rocket
 
 
The Scientists
Director's Notes
Producer's Notes
Tune In
 
Series 1:
Mediterranean
Series 2:
Carriacou
Series 3:
New Zealand
 
About the Show
Discover More
Feedback
Site Map
 
spacer spacer spacer
Jonathan's Rocket Diary Day 1 2 3

Day Two

Today I have fun learning to braze the metal parts together to get a good seal. Unfortunately there weren't any cleaning brushes so I didn’t do a good job in cleaning up the parts before brazing and so it didn’t go well. But I had a lot of fun with the oxy-acetylene torch and managed to get the hang of it all okay.

The seal at the end of the rocket is crucial for the success of the thing taking off. Ideally it would be good to have a lead seal which would melt at a high temperature and then release the pent up pressure – and launch. However I could not get the lead to stick in properly and it leaked water anyway! So for a first try we used epoxy resin to seal the hole.

Tried out the first steam rocket experiments. Made up a launching system to hold the rocket upright while it is being heated. Unfortunately I found that the thing leaked and so had to go back to the drawing board. It didn’t leak at the epoxy hole though so it seems that the welding / brazing weren’t good enough.

< Previous

 

Jonathan and Kate test rockets
Scientists Diaries

It's nearly all over - but will the team be able to complete the final challenge? Follow the task in their diaries:

Ellen
Iain
Kathy
Mike